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Author Topic: JBL SRX subs  (Read 12225 times)

Ryan McGinn

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JBL SRX subs
« on: October 25, 2007, 01:05:43 pm »

 Confused

Hello everyone,

I am looking to purchase a subwoofer for my band that I plan on running on a Crown Xti4000 or Xti2000.

I know that if I were to go with the MRX528 I could get away with the Crown2000, but I would need the Crown4000 for the SRX728.

We play small to mid-size venues, and at the current time, I only have the budget for one sub and amp.  I could swing the SRX/xti4000 combo, but I am just wondering if it is worth the extra cash.  I will most likely be expanding on the system (obviously i will not always be running 1 2x12) but do not have the cash now, and I am looking to get the most thump for my buck.

Again, these are small to medium size venues, and I'm not necessarily interested in the weight of horn cabs.

Can someone help me with some input?

Thanks in advance!
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Wayne Parham

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Re: JBL SRX728 or MRX528
« Reply #1 on: October 25, 2007, 02:19:00 pm »


In my opinion, a Crown XTi2000 bridged is plenty for a JBL SRX728S.  Good stuff, sounds great.
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Wayne Parham
π Speakers
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Jeff Babcock

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Re: JBL SRX728 or MRX528
« Reply #2 on: October 25, 2007, 03:39:08 pm »

Keep in mind there are many options out there besides JBL.  Nothing wrong with what you have already considered, but they are quite power hungry as are most JBL products.  If you are looking at JBL MRX why not also look at some other decent midrange fairly compact subs such as JTR Growler, Yorkville LS800p, Yorkville UCS1, EAW LA400, and many others.  Some of those will come in less costly than the JBL and have a bit more output with less power amp required.

Josh Oswald

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Re: JBL SRX728 or MRX528
« Reply #3 on: October 25, 2007, 11:30:55 pm »

Hey man, i don't know where you are located but there is a pair of LS808's for sale in the Lab Marketplace for a song; like $500 for the pair before shipping. You could get those, bridge your XTI2000 and rock hard.
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Evangel Temple Church
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Ryan McGinn

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Re: JBL SRX728 or MRX528
« Reply #4 on: October 26, 2007, 10:00:25 am »

I've read in a lot of places that people think that JBL's are power hungry subs.  At the same time, however, I've heard the subs and they have some great clarity.  I guess that price in the long run is not a huge concern, but I'm looking for something that I can expand on eventually as well.  If i were to expand on the SRX line would it be noticably better sound that if i were to expand on the MRX line?

I guess I'm one of those people who likes the JBL name and everything, so if I were to go JBL, I guess I'm mostly curious about the rating of the MRX vs. SRX.

MRX Specs:
Frequency Range: 35 Hz - 250 Hz
Frequency Response: 40 Hz - 250 Hz
Sensitivity: 97 dB SPL; 103 dB SPL
Nominal Impedance: 4 ohms
Power Capacity: 1000 W / 2000 W / 4000W
Rated Maximum SPL: 133 dB SPL(139 dB SPL)*
Coverage Pattern: 70
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Jim Duyck

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Re: JBL SRX728 or MRX528
« Reply #5 on: October 26, 2007, 10:19:57 am »

that, and not that i'm overly impressed with the srx one, but the srx box will be stouter than the mrx one...more so that the mrx felt cheaper - more resonant, etc....i wonder how much do a pair of VT4880's run used???  since you're wanting the jbl name...heck, I have a pair of SR4719X's sitting around.... Rolling Eyes
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~jim~

John Schmidt

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Re: JBL SRX728 or MRX528
« Reply #6 on: October 26, 2007, 10:47:10 am »

There is no comparison between the drivers in the SRX728 and MRX528. The 728 uses a differential drive model with 23mm Xmax, while the 528 uses a very basic driver with 9.5mm Xmax.

John
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Jeff Babcock

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Re: JBL SRX728 or MRX528
« Reply #7 on: October 26, 2007, 01:31:28 pm »

A pair of growlers will come in at a similar price (just a bit more) than 1 srx728 and will definitely have more output.  They will also seem to throw sound farther.  SRX728's to me sound good in close but once you get away from them they seem weak.  There are some other users who were on SRX728, switched to Growlers and are very happy.  Maybe a good fit for you?

You said you have only budget for 1 sub and 1 amp.  Why not 2 growlers and 1 amp?  I would do that in a hearbeat.

Growlers would be easier to transport and more flexible to deploy (you're not stuck with one big sub that might not always be able to be put in the center of the stage), that to me would make for awkward positioning in many scenarios.  So what if your subs have a JBL logo on them?  If you are that worried about names just put a JBL sticker on the side of your fx rack....  I'd rather have a pair of better compact subs than one with less output that has an orange sticker on the front.

My 2c
Jeff

Ned Cullen

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4 SRX718S vs. 2 SRX728S
« Reply #8 on: October 26, 2007, 04:53:34 pm »

I've already got a pair of SRX718S's and the plan is to expand to 4 but was wondering if 4 718s will sound as good as 2 728's or if there is basically no difference.
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Ken Freeman

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #9 on: October 26, 2007, 11:52:11 pm »

Hey Ned,

Same parts...I think you have more flexibility with the smaller enclosures.

Ken
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Ned Cullen

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #10 on: October 27, 2007, 12:14:25 pm »

Thats what I thought too but wanted a second opinion.
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Ryan McGinn

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Re: JBL SRX728 or MRX528
« Reply #11 on: October 29, 2007, 12:05:06 pm »

John,

Does that statistic hold through to the SRX tops and mids?  725 and 722?  I guess overall, how much better would you rate the MRX vs. SRX series.  I guess like someone up top said, I would probably want 2 single cabs instead, where in this case I could just go with 2 SRX718s bridged through an Xti 4000.  

If I'm looking for expandability and good sound, the SRX would probably be the better route even for the extra hundreds and thousands of dollars in the long run.  Is the benefit of the better xmax worth the $$$?  

Also, what is Xmax exactly?  Just trying to get more familiar with the details.

Thanks
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Jeff Babcock

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Re: JBL SRX728 or MRX528
« Reply #12 on: October 30, 2007, 01:30:10 pm »

Ryan,
Maybe you should move this post over to the lab lounge.  Really this forum is not so much for "what sub should I buy" advice but rather to discuss the Lab Sub and various related discussion topics, mostly around horn-loaded subwoofer designs.  You will get more responses there.

BTW, Xmax is important but not the be-all and end all of driver specs.  There are some good past discussions regarding drivers and what makes them suitable for a given cabinet, that will get you started into learning about this very broad subject.

Jeff

Josh Oswald

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #13 on: October 30, 2007, 03:50:24 pm »

Read this...
http://srforums.prosoundweb.com/index.php/m/147332/14824/?sr ch=scalability+oswald#msg_147332
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John Schmidt

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Re: JBL SRX728 or MRX528
« Reply #14 on: October 30, 2007, 10:33:25 pm »

Ryan McGinn wrote on Mon, 29 October 2007 09:05

Does that statistic hold through to the SRX tops and mids?  725 and 722?  I guess overall, how much better would you rate the MRX vs. SRX series.

SRX is pretty much a level up from the MRX series. For example, the MRX series uses those little HF drivers with the polymer diaphragms, while the SRX725 HF driver alone costs more than a complete MRX525!

Quote:

Also, what is Xmax exactly?

Well, not exactly, but generally, Xmax is the distance forward or backward that the cone can travel and have the voice coil still remain fully in the magnetic gap. That alone, though, does not necessarily mean the speaker with a greater Xmax can acceptably put out that much more sound, though more Xmax generally means you have more overhead to play with, without stressing the speaker.

John
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Miguel Castro Rios

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #15 on: October 30, 2007, 10:34:26 pm »

I have used the SRX and I must say that for some reason, compared to other similar boxes, they sound good and all. But after you walk away from them they seem to loose a lot of power. I know that doesn't make much sense but that's how I ''feel'' them.

Now I have never used Growlers but I hear a LOT of good comments about them.

Miguel
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Vic Cowles

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #16 on: November 15, 2007, 11:12:54 am »

Had nothing but problems with 728's.  Bought JTR Growlers, and sold the 728's.  The new owners are happy with the 728's. I still can't believe the performance of the Growlers. So,  I spose this is a lesson in opinions.  As they say, everybody's got one.
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Jeff Babcock

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #17 on: November 15, 2007, 12:40:41 pm »

Seems like the OP has his heart set on JBL for some reason.  IMHO there are so many superior offerings out there, even at a lower cost.  But hey, to each his own.

Brad Gibson

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #18 on: December 06, 2007, 08:34:56 pm »

The 728's are hungry for power, but when you give them the power they want they are great (3200 watts program).  I dont find that they are week at a distance at all.  I would say for the market that they are intended for they are great.  

Brad index.php/fa/12779/0/

Drew Curtis

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Re: 4 SRX718S vs. 2 SRX728S
« Reply #19 on: January 11, 2008, 10:03:02 am »

Brad Gibson wrote on Thu, 06 December 2007 19:34

The 728's are hungry for power, but when you give them the power they want they are great (3200 watts program).  I dont find that they are week at a distance at all.  I would say for the market that they are intended for they are great.  

Brad index.php/fa/12779/0/


That stack could have used some straps.

I'll second those who have mentioned the fact that the SRX728 needs LOADS of power to get moving. The grilles and finish on the new SRX cabinets are very fragile as well.
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