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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Lounge => Topic started by: Debbie Dunkley on March 21, 2014, 01:37:22 PM
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Looking for something different sub-wise but not interested in lugging around something stupid heavy or at least no heavier than my SRX718's.
These would be used with my PRX612's that I use for small gigs for band use. For a change I'd like to try 15's which would be more than adequate for the smaller venues round here.
I run SRX718's along with my SRX715's for the medium size venues.
I am interested in the new PRX715XLF subs but would like get some real world experience from anyone using them.
I havent heard much about the Turbosound range of loudspeakers but I get the impression from what I read - reviews and specs - that they are quite good and the pricing is very good. I see a couple different 15" subs listed on the website.
Any experience with these or anything else that might compare?????
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Looking for something different sub-wise but not interested in lugging around something stupid heavy or at least no heavier than my SRX718's.
These would be used with my PRX612's that I use for small gigs for band use. For a change I'd like to try 15's which would be more than adequate for the smaller venues round here.
I run SRX718's along with my SRX715's for the medium size venues.
I am interested in the new PRX715XLF subs but would like get some real world experience from anyone using them.
I havent heard much about the Turbosound range of loudspeakers but I get the impression from what I read - reviews and specs - that they are quite good and the pricing is very good. I see a couple different 15" subs listed on the website.
Any experience with these or anything else that might compare?????
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I should clarify a bit...It is the 'lower end Turbosound' subs that I am looking at...IQ15 BT and M15 bul 2200
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So no feedback on the PRX715XLF or similar ? Can't get to demo anything round here so I was hoping for a comment or 2 on how the 15" holds up in a small bar type setting.......??????
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So no feedback on the PRX715XLF or similar ? Can't get to demo anything round here so I was hoping for a comment or 2 on how the 15" holds up in a small bar type setting.......??????
Well Debbie, on the second page of the Lounge right now, there's a post from Novemberish with reviews on the PRX715XLF. Someone posted in it yesterday so that's why it bumped back up. Give it a read... good hands-on reports there.
-Ray
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Well Debbie, on the second page of the Lounge right now, there's a post from Novemberish with reviews on the PRX715XLF. Someone posted in it yesterday so that's why it bumped back up. Give it a read... good hands-on reports there.
-Ray
Thanks Ray.
After I posted yesterday I had come across this thread in a google search but figured it was more about the PRX710 and PRX715 pair up and holes (or lack thereof) in the frequency range and didn't give much away about the actual PRX715 performance. Also the comment about the fan noise got mentioned twice in that thread and that is something I was hoping would be addressed by someone here who owns the PRX7i5 sub.
Maybe they are just not that popular but there is something about them that I like - err weight and size maybe???
I don't really expect them to go as low as the PRX618xlf/PRX718xlf cabs or my SRX718's but for smaller spaces (kick drum and lower end bass frequencies) and for pure convenience, if they will suffice...I'd like to give them a try unless someone here has had a bad experience....
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What you should be looking at is NOT the size of the driver-but RATHER what parameters you need to achieve a particular set of performance criteria within a specific price range.
Who cares if that set of parameters can be achieve with a 10" or a 48" driver.
Things such as max SPL at a particular freq and a specific box size.
Wattage should be way down on the list of parameters. A box with a higher sensitivity can achieve a particular SPL with less power (and probably sound better doing so-due to less driver movement and therefore less distortion).
To me driver size is like looking for a new mixing console and saying it needs to have 3/4" knobs on it.
There are things that are much more important than driver size.
But driver size and wattage are the things that many people are "drawn to" even though they may "think" they understand them-but in most cases really have no idea how those numbers really relate to actual performance-or how little importance they really have in terms of overall performance.
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Hi Ivan,
I've learned not to even worry too much about wattage from what I have learned here so that isn't a concern. Not sure the 1500 watt stamp stands for much anyway - does it?... I also realize that the max SPL on the PRX715 is less than the PRX's big brother -the PRX718 - 131db compared to 134db and of course the frequency response is at 44hz compared to 35hz.
Years ago, I ran 15" subs for PA for local bands (including my own) for years and felt they did a great job but now it seems everyone wants 18's and if you mention using 15" subs - it's like saying - ..."Yes, my 15" subs are totally inadequate - unlike my colleagues who all use 18" ".
And don't get me wrong - I LOVE my SRX 718's but it's nice to not have to take an extra amp rack with me when I use my powered set up.
I'd love to use a pair of 15" powered subs in a small bar and blow people away with the bottom end.....If EQ'd well, is that even possible??
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A friend of mine just purchased PRX715 over PRX715XLF. When he and I were discussing what to replace his previous setup with (Jbl EON15G2 over PRX618XLF) he stated that he wanted subs with close the same output but more compact and lighter so that he could carry them himself if he has to. I haven't been able to get out to his gigs since he got the new system a few weeks ago, other than a couple hours earlier this week, because I just had quad bypass surgery a few weeks ago. Do the 15's play as low as the PRX618XLF does? Nope. But my initial impression was that they are still enough sub suitable as a more compact alternative for small venues. As for the difference in rated max output between the 18 and the 15, it's only a 3dB difference and will not likely be noticed by the average person. I'll be getting out more, now that I'm allowed to drive myself around again. I want to get a better idea of their pwrformance closer to the end of the night when the bar is more energetic.
Sent from my Galaxy S4 using Tapatalk
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A friend of mine just purchased PRX715 over PRX715XLF. When he and I were discussing what to replace his previous setup with (Jbl EON15G2 over PRX618XLF) he stated that he wanted subs with close the same output but more compact and lighter so that he could carry them himself if he has to. I haven't been able to get out to his gigs since he got the new system a few weeks ago, other than a couple hours earlier this week, because I just had quad bypass surgery a few weeks ago. Do the 15's play as low as the PRX618XLF does? Nope. But my initial impression was that they are still enough sub suitable as a more compact alternative for small venues. As for the difference in rated max output between the 18 and the 15, it's only a 3dB difference and will not likely be noticed by the average person. I'll be getting out more, now that I'm allowed to drive myself around again. I want to get a better idea of their pwrformance closer to the end of the night when the bar is more energetic.
Sent from my Galaxy S4 using Tapatalk
Good to know Travis and stay well...
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Debbie the danley TH mini is pretty small and has impressive performance for the size. It's a different level of equipment than the prx stuff, but perhaps worth checking out.
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EV has a new powered line coming out that has a 15" sub. I only got to hear a short demo at NAMM but it did seam to sound good for all of what I heard from it.
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Debbie the danley TH mini is pretty small and has impressive performance for the size. It's a different level of equipment than the prx stuff, but perhaps worth checking out.
Probably very good quality and sound for its size...do you use any of these Cailen??
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EV has a new powered line coming out that has a 15" sub. I only got to hear a short demo at NAMM but it did seam to sound good for all of what I heard from it.
The ETX series that I am seeing? Another good consideration. Good specs but quite heavy for a 15" I see. - almost 92 lbs. Looks very nice though and well built - should do well...
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I use the th112 in a couple of our venues. We also have th118s. I have not used the TH mini but it seems to exceed the specs on the 15" prx, and is pretty compact.
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I use the th112 in a couple of our venues. We also have th118s. I have not used the TH mini but it seems to exceed the specs on the 15" prx, and is pretty compact.
Hard to find online....I still need to come and hear your systems.....
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Changed my mind but I need some advice as to how well this will work for me.
After some consideration, I decided that space was more important than weight.
As I already own 2X SRX718's and 2x SRX715's which works great for larger bars and restaurants and I am selling my K-Subs which I use with my PRX612's or my K10's in small bars, what about this?
What if I get a single PRX718xlf, use it on its own with the 2 PRX612's in small bars, and use it from aux on the mixer as an extra sub with my SRX series if I need a bit more bottom end when using that system.
A friend of mine insists if I put the PRX718 on one side of the stage and the 2 x SRX718's on the other, they SHOULD play nicely together. And I am hoping that as I have been happy for the most part with the K-Subs in small venues, I should be very happy with the single PRX718 sub.....??????
Allows for a little scalability............Yes, maybe???
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Changed my mind but I need some advice as to how well this will work for me.
After some consideration, I decided that space was more important than weight.
As I already own 2X SRX718's and 2x SRX715's which works great for larger bars and restaurants and I am selling my K-Subs which I use with my PRX612's or my K10's in small bars, what about this?
What if I get a single PRX718xlf, use it on its own with the 2 PRX612's in small bars, and use it from aux on the mixer as an extra sub with my SRX series if I need a bit more bottom end when using that system.
A friend of mine insists if I put the PRX718 on one side of the stage and the 2 x SRX718's on the other, they SHOULD play nicely together. And I am hoping that as I have been happy for the most part with the K-Subs in small venues, I should be very happy with the single PRX718 sub.....??????
Allows for a little scalability............Yes, maybe???
keep the K-subs. if you need more LF get 2 more. easy to transport, a great product from a company that supports its product. if you just have to have 18" go with the KW181
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Changed my mind but I need some advice as to how well this will work for me.
After some consideration, I decided that space was more important than weight.
As I already own 2X SRX718's and 2x SRX715's which works great for larger bars and restaurants and I am selling my K-Subs which I use with my PRX612's or my K10's in small bars, what about this?
What if I get a single PRX718xlf, use it on its own with the 2 PRX612's in small bars, and use it from aux on the mixer as an extra sub with my SRX series if I need a bit more bottom end when using that system.
A friend of mine insists if I put the PRX718 on one side of the stage and the 2 x SRX718's on the other, they SHOULD play nicely together. And I am hoping that as I have been happy for the most part with the K-Subs in small venues, I should be very happy with the single PRX718 sub.....??????
Allows for a little scalability............Yes, maybe???
I have PRX718XLF that I regularly use with PRX612 and 615. It's a good combination. Also, while I haven't measured things yet, I've used PRX718XLF and SRX718 together (and my fairly picky ears didn't notice any issues). I always recommend measuring to verfiy, but they seem to play nicely together.
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keep the K-subs. if you need more LF get 2 more. easy to transport, a great product from a company that supports its product. if you just have to have 18" go with the KW181
Hi Tim.
I agree that QSC are a great company who stand by their products and I would also say that the K-Subs are well made and very reliable - no complaints at all.
However,. Getting more K-Subs wouldn't benefit me because I couldn't use them efficiently with my SRX subs and have the flexibility of using them with both systems.
I started this thread by asking for feedback on switching to 15" subs but I took my 18's out again this weekend and reconsidered which had me considering a more scaleable system.
I would consider the KW181- its a good sub but I'd like to be able to use my PRX612's without taking my C/O with me and if I get the JBL, I can do that. HPF in sub - not top.
Because the SRX system is quite power hungry, it does not work well in small places - those cabs need power and unless they are being driven, they do not perform as well. That is why I always keep an alternative PA for those places where I have to keep the volume down and my powered speakers have been great for that - K-Subs included. Just trying to get a sound closer to my SRX718's I suppose but in a box that I can use with my PRX612's and perhaps add to my SRX system if extra bottom end is required. Doesn't happen much but nice to have if needed.
If I could afford it, I would keep the K-Subs and get a powered 18". That way, I would be able to use them when the situation suits as they are good looking, small footprint, easy to transport etc, etc, etc. but I've got to get some money back on these so they have to go......
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I have PRX718XLF that I regularly use with PRX612 and 615. It's a good combination. Also, while I haven't measured things yet, I've used PRX718XLF and SRX718 together (and my fairly picky ears didn't notice any issues). I always recommend measuring to verfiy, but they seem to play nicely together.
Good to know Scott. No guarantees - I know that, but I think I stand a good chance of being able to get them to work together. The worst that can happen is I only get to use the PRX718 with my PRX612's (eliminating the need for a C/O ) - not such a bad downside....
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Sorry for my english.
Have you looked at Db technologies sub15d?
We have a few at our shop, I offen use them with prx612m. Sums pretty good.
Nice punch, but maybe lacking a bit of lowend. But size and weight are fantastic.
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Sorry for my english.
Have you looked at Db technologies sub15d?
We have a few at our shop, I offen use them with prx612m. Sums pretty good.
Nice punch, but maybe lacking a bit of lowend. But size and weight are fantastic.
Thank you Johan - There is nothing wrong with your English !!!
Good looking subs from what I can tell. The problem I always have is that I don't want to buy something I haven't heard and I never get to hear anything but JBL, EV, QSC or something far less (Harbinger and alike -ouch) round these parts.
Yesterday, I had a surprise offer on my K-Subs and I sold them in one day. Soon afterwards, I started to regret my decision as I always do (probably could have asked more, love the attached wheels, well built, small footprint, elegant look, great covers etc etc) but then figured I'd go listen to the JBL PRX718xlf in my local GC - after all, this was part of the plan.
I was very happy to find that I found it similar in tone to my SRX718's and more what I have been looking for. It was bigger than I had imagined but with my plan to only carry the one with the powered setup, it would still be a slightly smaller footprint than the 2 K-Subs and more compatible with my PRX612's.
So, I bought it and brought it home.
I tried it out in my living room. Great sound and clear lows. - it sounds really good to my ear.
My only concern though, might be whether it will be loud enough - in comparison to the 612's. I only say this because to get it to where the lows are nice and full, I was running it at just over 3/4 but the 612's at 1/3. Does this seem about right or is it possible I prefer the sound of a bass heavy system? I always had the K-Subs set higher than the 612's or the K10's I used with them but I figured with a 4db increase in SPL with the PRX, I would be setting the gain no higher or even lower than where the K-Subs had always been. The desk was very low of course in my home and would be much higher at a gig but it was the big difference between the 2 settings that I was wondering about. Remember the plan was not to get 2 of these which would defeat the object so it needs to be loud enough as a single unit.
Love the sound though - much prefer it for the music I play. I know the bands I do sound for will like it in those smaller bars.
Still playing with it and really pleased with the decision so far.
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Tops will always outpace subs in terms of output so having to dial it up to "match" the tops is not out of the ordinary.
It really comes down to how it sounds, and if you like how it sounds then that's that. Being able to do a "dry run" of the new setup where you can really let it stretch its legs may be in order. You may find that with some extra volume things may change than when they're in your living room.
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Tops will always outpace subs in terms of output so having to dial it up to "match" the tops is not out of the ordinary.
It really comes down to how it sounds, and if you like how it sounds then that's that. Being able to do a "dry run" of the new setup where you can really let it stretch its legs may be in order. You may find that with some extra volume things may change than when they're in your living room.
Hey taylor...Yes, you are right......it will be a whole different ball game in a larger room and I should wait till I put the system through its paces before I start getting concerned about the sub's capabilities. I am also hoping that the throw will be better with the PRX than the K-Subs which was always a downside to those K-subs.
I am really really pleased right now and looking forward to the first show - if I can get close the sound I get from my SRX system but at lower levels, I'll be very happy.....
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I just tried the system again in the same gain positions and inverted the polarity - made a noticeable difference. Didn't think of it before now....duh...
But I don't really understand why. If the crossover is selected, none of the frequencies are overlapping so why should this make a difference?? My understanding is that there will be some overlap on the c/o slopes to an extent depending on slopes used,would this be the reason??
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If the crossover is selected, none of the frequencies are overlapping so why should this make a difference??
Crossovers vary in slope, steeper crossovers overlap less, but both top and bottom speakers response overlap through the acoustical crossover region. The region moves up in frequency if the subs are set with more gain than the tops.
Reversing polarity of the sub or top will result in either an increase or decrease in level the overlap region, which may be from a fraction of an octave to over an octave depending on the slope selected and the sub and tops frequency response. Polarity is just the first step to proper alignment of the subs and tops.
Louder subs "throw" further, all subs drop at 6 dB for each doubling of distance outdoors.
In small rooms, the room modes dominate, so response varies in level with frequency throughout the room. It is not uncommon in small rooms to find areas further away from the sub location to actually be louder than near locations.
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Crossovers vary in slope, steeper crossovers overlap less, but both top and bottom speakers response overlap through the acoustical crossover region. The region moves up in frequency if the subs are set with more gain than the tops.
Reversing polarity of the sub or top will result in either an increase or decrease in level the overlap region, which may be from a fraction of an octave to over an octave depending on the slope selected and the sub and tops frequency response. Polarity is just the first step to proper alignment of the subs and tops.
Louder subs "throw" further, all subs drop at 6 dB for each doubling of distance outdoors.
In small rooms, the room modes dominate, so response varies in level with frequency throughout the room. It is not uncommon in small rooms to find areas further away from the sub location to actually be louder than near locations.
Thanks Art, so I was on the right track I suppose. Thank you for the explanation. I added the last sentence as an edit to my last comment because I gave it some thought and realized that it must have something to do with those slopes. The 180 polarity switch definitely makes a difference even at the low volume I use in my house.
I've not paid much much attention to polarity over the years and it makes me wonder just how many times this has caused those frequency overlaps in the past and I didn't even realize.
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Speaking of polarity ....I have a question.
My understanding is that the polarity dictates whether (in my simplistic terms) the driver moves in and then out or out and then in right? either with, or opposite to the accompanying speaker. .....OK - so the polarity button on the back of the cabinet, it seems it would be really easy for some eejutt to press it in while the speaker is working.
Would this cause damage to suddenly have a driver change direction whilst moving? . When I was checking between the 2 polarities earlier today, I turned down the source material and even turned down the gain control on the back of the cabinet too before pushing in the button each time. Is it anything to worry about? Would a better design have been to recess the button or use a switch??????
Am I being too careful??
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BTW...I LOVE you guys.....you are the bestest !
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Speaking of polarity ....I have a question.
My understanding is that the polarity dictates whether (in my simplistic terms) the driver moves in and then out or out and then in right? either with, or opposite to the accompanying speaker. .....OK - so the polarity button on the back of the cabinet, it seems it would be really easy for some eejutt to press it in while the speaker is working.
Would this cause damage to suddenly have a driver change direction whilst moving? . When I was checking between the 2 polarities earlier today, I turned down the source material and even turned down the gain control on the back of the cabinet too before pushing in the button each time. Is it anything to worry about? Would a better design have been to recess the button or use a switch??????
Am I being too careful??
The term "polarity" simply indicates that all components of the system are receiving the same signal. Meaning, all "+" connections on the speakers should be connected to the "+" end of the amplifier(s); same with the "-" connections. As well, all interconnect cables (XLR, 1/4", etc...) should all be wired allowing "+" to " + " and " - " to " - " connections. With interconnect cables, you shouldn't ever have to worry about these being wired out-of-polarity because they are factory made (unless you make your own!). The biggest observation of polarity issues is in the speaker connections between the amp and the speaker; however you are using all powered speakers, so polarity issues (with respect to wiring) will not affect you.
I'm not aware of any issues with pushing the polarity button on the back of powered speaker while they are in use. The speaker is already moving forward/backward. Switching polarity "on the fly" is just changing the direction of the cone (which it is already doing).
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Yes - push the button while the band is playing to hear the effect. I do this all the time, and the result can be surprising. You'll find the low-end dispersion can change, sometimes better, other times worth. It does no harm to the speaker to change the polarity button while playing at full volume.
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Yes - push the button while the band is playing to hear the effect. I do this all the time, and the result can be surprising. You'll find the low-end dispersion can change, sometimes better, other times worth. It does no harm to the speaker to change the polarity button while playing at full volume.
Thanks Steve. I'll try it..
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Follow - up on the PRX718XLF...I friggin love it !!
I am very surprised at how much of an output this thing has. Bear in mind, my powered system used to comprise 2 K-subs and 2 PRX612's. So this was my comparison. Well, I used to couple the K-subs AND set them 50% higher than the tops to balance. Now, I set the PRX718 at around the same as the tops and I only have one - not 2 and the sub stays with the tops. This seems crazy considering usually much more power is required for the low end.
Admittedly I have only run sound in moderately small venues so far but I am very happy with this sub. I have 4 PRX612's in total and I would be interested to see just how far I can push the system if I got another 718 and ran the 2 subs coupled with the 4 tops - would be great for larger venues or outside.
I usually run my SRX system on the bigger gigs which I love the sound of but I'm beginning to get it with powered speakers....no amp rack, money tied up in drive rack and huge amps, less space in the van, no heavy speakons, easier set-up. I never felt this way when I used the Ksubs because I never felt it came close to my SRX system but with the PRX718......it's really close especially for the places we play. I have a whole bunch of money tied up in my SRX system and could get another PRX718 and bank the rest.....What do you guys think???
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I think I am still waiting on a JBL PRX module repair. No more JBL for me ever. Used maybe if its a great deal.
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Debbie, I use the JBL PRX618S-XLF subs with SRX 722's and I am very happy with the system. My subs are about two years old now and have been trouble free so far.
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Debbie, I use the JBL PRX618S-XLF subs with SRX 722's and I am very happy with the system. My subs are about two years old now and have been trouble free so far.
Good to know. I am liking the 'powered' thang .......
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I think I am still waiting on a JBL PRX module repair. No more JBL for me ever. Used maybe if its a great deal.
I'm sorry Tim. I can see how things like this would affect your comfort level with a manufacturer. I'd probably feel the same way.
I am like that with Sony products. Everything I have ever owned Sony has either crapped out just outside of warranty or been a continuous PIA from day one. YET I know people who swear by Sony and love everything about them.
All I can say is even with my recent repair situation on my PRX612, I have owned so much JBL over the years and when I first started singing I owned Altec Lansing and I have NEVER had any problems. Although I get the impression its more the poor care you have received than the actual breakdown right???
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I had used my new PRX718xlf a couple of times and had pretty good results so far. Nice tight low end and enough power even with just the one - small/medium sized bars.
So this weekend I used it on the louder rock band in a local bar/restaurant. Mmmm...... bit disappointed.
It might have helped a bit if I could have placed it by a wall but it was a good 6 ft away from a thin partition wall.
I was having to push it hard to get decent levels and it left me wanting.
I really do not want to have to buy another one - that wasn't the idea behind selling both my K-subs and going to the 1 PRX718xlf instead. This is supposed to be my smaller system when I don't want to lug around my SRX system with amp racks, heavy speakons etc.
I was convinced that I would get as much out of the PRX as I did both my K-subs that I sold.....but I don't think so.
I really like the sub but it might not be enough for some bands/venues and I'll have to use the other rig more often...darn...
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I had used my new PRX718xlf a couple of times and had pretty good results so far. Nice tight low end and enough power even with just the one - small/medium sized bars.
So this weekend I used it on the louder rock band in a local bar/restaurant. Mmmm...... bit disappointed.
It might have helped a bit if I could have placed it by a wall but it was a good 6 ft away from a thin partition wall.
I was having to push it hard to get decent levels and it left me wanting.
I really do not want to have to buy another one - that wasn't the idea behind selling both my K-subs and going to the 1 PRX718xlf instead. This is supposed to be my smaller system when I don't want to lug around my SRX system with amp racks, heavy speakons etc.
I was convinced that I would get as much out of the PRX as I did both my K-subs that I sold.....but I don't think so.
I really like the sub but it might not be enough for some bands/venues and I'll have to use the other rig more often...darn...
The PRX XLF subs are known for having good extension and being light weight not the (punchiest) for kick on rock music. Did you try to boost the 70-80hz range?
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The PRX XLF subs are known for having good extension and being light weight not the (punchiest) for kick on rock music. Did you try to boost the 70-80hz range?
i tried a couple different things....boosting various frequencies including the 70-80hz range and switched polarity. I'll try again.... Last night I took out the SRX system and those SRX718's ROCKED so maybe I expected too much from a single PRX718xlf...?
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So this weekend I used it on the louder rock band in a local bar/restaurant. Mmmm...... bit disappointed.
It might have helped a bit if I could have placed it by a wall but it was a good 6 ft away from a thin partition wall.
I was having to push it hard to get decent levels and it left me wanting.
The sub didn't change, the room did. The changed room also dictated a placement that is pretty much guaranteed to create problems. Think in wavelengths, specifically when a reflection is 180° late in phase and what happens when that meets the un-reflected sound.
At 100Hz, the physical wavelength is 11.3ft; at 80Hz - 14.13ft; at 60Hz - 18.8ft; at 50Hz - 22.6ft.
That you boosted EQ but could not hear a difference equal to the electrical change applied is a big clue that the problem lies in time (distance), and not magnitude.
When you grok this concept, I will have hopefully changed your (audio) life. Time, what a concept!
You're welcome. Please drive through. ;)
edit ps: I used your sig line today while talking to an artist. He was amused. Thanks.
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The sub didn't change, the room did. The changed room also dictated a placement that is pretty much guaranteed to create problems. Think in wavelengths, specifically when a reflection is 180° late in phase and what happens when that meets the un-reflected sound.
At 100Hz, the physical wavelength is 11.3ft; at 80Hz - 14.13ft; at 60Hz - 18.8ft; at 50Hz - 22.6ft.
That you boosted EQ but could not hear a difference equal to the electrical change applied is a big clue that the problem lies in time (distance), and not magnitude.
When you grok this concept, I will have hopefully changed your (audio) life. Time, what a concept!
You're welcome. Please drive through. ;)
edit ps: I used your sig line today while talking to an artist. He was amused. Thanks.
ha ha...you are welcome...rather funny isn't it???
You are such a clever fella 'bout this stuff and I love to learn so I will read your response 17 times and hopefully I'll understand 50% of it !!!!
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ha ha...you are welcome...rather funny isn't it???
You are such a clever fella 'bout this stuff and I love to learn so I will read your response 17 times and hopefully I'll understand 50% of it !!!!
I took my first Smaart class 10 years ago and consider myself to still be a student of time. I can measure it, manipulate it, and sometimes do good with those. But thinking of how time works has fundamentally changed how I think about acoustic signals.
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I took my first Smaart class 10 years ago and consider myself to still be a student of time. I can measure it, manipulate it, and sometimes do good with those. But thinking of how time works has fundamentally changed how I think about acoustic signals.
We don't hear about it a lot even among those of us that overly geek out measuring. ( "I know eventually we will have a show, but I am having fun NOW", Jay said to the band waiting to soundcheck) but this type of negative information is useful to me in my decision making process. If I can't hear the result of system changes I want to know why.
One of the best things you can do with a portable system is to take the time to simply push the subs around and pay attention to how they respond to their locations. Over time placement will become a little more second nature and you will be able to look at the actual options a room offers and choose which you like best. Also take the time to walk around the room and listen for changes in the pattern.
And then once you think you have it down, some room will surprise you and then you start over with a little deeper understanding.
You can also play around in one of the modeling programs but at some point you need to relate the images to what you can actually hear.
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The sub didn't change, the room did. The changed room also dictated a placement that is pretty much guaranteed to create problems. Think in wavelengths, specifically when a reflection is 180° late in phase and what happens when that meets the un-reflected sound.
Hey Tim....just wanted to say you were right about the room.....used the sub many times since and it has been fantastic every time....
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Another way to work a sub and room is what home theater teachs. To place the sub at the listening seat and walk the room for the sound. Then place the sub in the place where you find your sound.
Another one is take advantage of the corner of the room to get your six to twelve db boost from the corner
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Another thought on the subject of the 15 inch sub is that if you placed an 18 inch sub in the same place the measured response at that location will not change. If you have a dip at 80 hz than that will still be the problem for a 15 and 18. If you cannot get EQ to adjust in a frequency it is a null in the acoustics and you cannot change the room on a mobile system. Another problem is with a mobile system you never have enough time to test the venue and get a good sound check with the band.
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I have the SRX718 and was looking for a 15" sub for smaller gigs . I ordered a pair of JBL VRX 15" subs and I really like them . They're really compact and weigh only 58 lbs . Tighter sounding and I like the 4 ohm speakers .
Nice....I am sure the VRX box is a very nice one. I wanted powered though and those VRX prices are a little out of my budget .
The PRX is 81 lbs which is of course a lot heavier than the VRX box but it does balance nicely when carried since JBL moved the side handles with the PRX700 range.
I use the PRX718xlf along with 2 x PRX612's when I don't want to take / don't have room for my amp rack and I can also use it aux send to add to my SRX system as I did this weekend. Maybe one day Ill come across a good deal on a couple 15" subs worth getting and pull the trigger.....
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Nice....I am sure the VRX box is a very nice one. I wanted powered though and those VRX prices are a little out of my budget .
The PRX is 81 lbs which is of course a lot heavier than the VRX box but it does balance nicely when carried since JBL moved the side handles with the PRX700 range.
I use the PRX718xlf along with 2 x PRX612's when I don't want to take / don't have room for my amp rack and I can also use it aux send to add to my SRX system as I did this weekend. Maybe one day Ill come across a good deal on a couple 15" subs worth getting and pull the trigger.....
The new PRX 715 xlf is 56lbs, if you don't need extended low end the larger 18" has (35-44hz) it looks like it may offer a good compact solution.
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The new PRX 715 xlf is 56lbs, if you don't need extended low end the larger 18" has (35-44hz) it looks like it may offer a good compact solution.
That is exactly the type of sub I what I was looking for if you check out my first post in this thread.
As things went along, I talked myself out of the 15" as I wasn't convinced it would be what I was looking for and more people had experience with the old PRX618xlf with great results.
I use the 18" as a single and it is quite capable in the smaller bars and venues and yes- it does have that nice low end...
But...yes....I would still like to hear a PRX715 xlf and compare it to the 718. One of the nice things about getting 2 of the 15" would be that each one is kinder to the back even though the 2 together weigh more than the one 718 of course...
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I'd like to hear from someone too, who compared 718 and 715,...
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