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Author Topic: Best amp for pair of Labsubs (Poll)  (Read 7192 times)

Raj Sookraj

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Best amp for pair of Labsubs (Poll)
« on: June 01, 2005, 08:59:27 pm »

I sold a MA5000VZ for new amps to match a pair of Labhorns.  Can you help me pick out the best amp to run these subs?
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Timmahh

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Re: Best amp for pair of Labsubs (Poll)
« Reply #1 on: June 01, 2005, 09:25:06 pm »

Im useing one EWI HS3600/pair of Labs. 2 Amps 4 Labs. PLENTY OF POWER. Very Happy im very satisfied with the performance. this subject has been beat to death 4 times over, do a search. it mostly boils down to properly setting up your system for what you have, and not pushing it beyond its limits. That being said, i would think you could of run the pair of labs off one side of the Crown, and still have room for more LABS when you build more, cuz you know you will. we all will. Twisted Evil guess i dont really follow your logic in selling the Crown.
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David Trotter

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Re: Best amp for pair of Labsubs (Poll)
« Reply #2 on: June 02, 2005, 11:47:07 am »

Depends upon a lot of things, some people have found 2k a lab too much power and some people do it day in day out ...

If its heavy sub dance music and your using them 1 or two a side, then PLX 3402 all the way mate to avoid damage.

If your doing live shows, cluster of 4 and good protection etc. Then RMX1850's.

i blew 4 drivers using macrotechs and can't afford the risk of blowing them again. two 3402's have given us ample bass and the weight saving is quite important for me too. We're yet to clip them, although i've heard of people clipping one channel into a single lab with no failures.





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Raj Sookraj

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Re: Best amp for pair of Labsubs (Poll)
« Reply #3 on: June 02, 2005, 09:13:56 pm »

From all the posts I've read, it seems like everyone is using, or recommends the RMX1850 as the perfect match for one labhorn.  I can get the 2450 for the same price as the 1850.  Would driving a 2450 bridged with 1800 watts output (using limiters) be too stressfull for the amp considering the ohm load?  How do you guys compare those two amps bridged used one per labhorn?  Thanks for your advice.


Raj
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John Roberts {JR}

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Re: Best amp for pair of Labsubs (Poll)
« Reply #4 on: June 02, 2005, 10:02:42 pm »

bubblersound wrote on Thu, 02 June 2005 20:13

From all the posts I've read, it seems like everyone is using, or recommends the RMX1850 as the perfect match for one labhorn.  I can get the 2450 for the same price as the 1850.  Would driving a 2450 bridged with 1800 watts output (using limiters) be too stressfull for the amp considering the ohm load?  How do you guys compare those two amps bridged used one per labhorn?  Thanks for your advice.


Raj


I'm not sure I understand your question... the 1850 is pretty much the same amp as the 2450 but with slightly lower rail voltage. This means you will have slightly less peak power, but it will run cooler so you can get very loud for more duration.

Putting a limiter on a 2450 does not give you an 1850, it gives you a 2450 that only puts out 1850W but runs hotter than a real 1850 so it will thermal out quicker. I see no benefit from doing this unless you anticipate some other use for the amp later that the 2450 would be better for.

In that case forget the limiter and  make sure it gets plenty of cool air.

JR
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Raj Sookraj

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Re: Best amp for pair of Labsubs (Poll)
« Reply #5 on: June 05, 2005, 12:06:00 pm »

I got a QSC RMX-4050HD for a real good price so i bought it to power 2 labs in stereo.  I think its like 2 RMX-1850HD's with a little more power.  I can't wait to put this system together.  Will have pics up in a couple of weeks.


Raj
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jeffhtg (Jeff Kenney)

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Re: Best amp for pair of Labsubs (Poll)
« Reply #6 on: June 06, 2005, 03:14:54 pm »

im wondering.. i never like the rmx amps at all.. i have used one of the 5050's on a install with some yamaha subs and it sounds okay.. but i was told that rmx is made in china.. if it breaks you throw it away.

I love the plx amps.. but what is yalls experience with the RMX HD amps? I mean.. its really "bottom of the barrel".. In fact im revisiting the amplifier question myself right now
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Roland Hogen

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Re: Best amp for pair of Labsubs (Poll)
« Reply #7 on: June 07, 2005, 08:40:27 pm »

For the money I think the rmx is a decent amp.  I use 2 2450s 1 for mains, 1 for monitors and a 1400 for subs.  Most of this gear is the bands.  They play 80's covers for corporate gigs and some outdoor stuff.  I have yet to have the 1400 thermal on me running it briged at 4 ohms. If I had the money I would switch to the plx's or Crown K series (to save my messed up back.)
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Evan Kirkendall

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Re: Best amp for pair of Labsubs (Poll)
« Reply #8 on: June 10, 2005, 01:44:10 pm »

I run all RMX amps. They sound fine to me. MAtter of fact, I really dont think there is a sound quality difference between the 2 amps. The PLX are just lighter. They are also pretty tough amps. I run mine hard and bridged at 4ohms. They havent failed me yet, even in the toughest conditions.
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jeffhtg (Jeff Kenney)

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Re: Best amp for pair of Labsubs (Poll)
« Reply #9 on: June 10, 2005, 05:03:26 pm »

define tough conditions..

my defination of "tough conditions" is something like

105 degrees, 90%humidity
10 hours constant full volume - hard compression and just up to full power
hard banging drum and bass, hip hop, or other form of dance music with a couple mics, guitars, and drums thrown in for a show - also played at full volume..

couple of beers spilt on amp rack.. fat chick dancing ontop of rack - high heels penetrating power cords and speaker wires.

next day we're gonna be on the beach - 100+ degrees lots of salt spray, some sand, the occasional hermit crab that wanders to close to the distro

now do this at LEAST 5 times a week... is the RMX still gonna be a tough amp?
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Evan Kirkendall

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Re: Best amp for pair of Labsubs (Poll)
« Reply #10 on: June 10, 2005, 05:46:05 pm »

Well, this is what my amps have been through:

95 degree heat, 80% humidity and being run at nearly full power for about 6hrs. I did that 7 times last summer and the amps held up just fine. Mind you I do sound for those loud rock bands with their mesa boogie half stacks, 8X10 bass cabs and loud ass drummers.

I dont have to deal with beers and high heels. I dont run my cables where people will step on them, and Im too young for bars...

Sure, there are better amps, but I think you cant beat the RMX amps for the price. They are built tough and sound fine. (flame suit on, Im ready to back this statement up  Twisted Evil )
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jeffhtg (Jeff Kenney)

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Re: Best amp for pair of Labsubs (Poll)
« Reply #11 on: June 11, 2005, 01:21:41 am »

7 nights of use hardly is enough to give an amplifer a positive rating.. well okay.. perhaps you may like the way it sounds.. but alot of people here are running there amps 200+ nights a year.. thats umm 29x more than you did in a year..

seriously.. im not saying rmx sucks- yet.. im just wondering how they hold up in the long run - and HOW HARD people are pushing them that use them.. al you got any comments on that?

for my test bed I have 8 labs running since 1/2005.. they have run 6 nights a week for 5 hours at a time - full blast in a hot humid club.. ive used diffrent amps - but the install crown vz5000's and mx3000's are 5-8 years old.. thats phenominal as far as im concerned.. i want that same life out of a mobile system.. 200 shows and im happy.. 400 shows and im really happy.. you get the drift? Smile
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Evan Kirkendall

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Re: Best amp for pair of Labsubs (Poll)
« Reply #12 on: June 11, 2005, 10:01:33 am »

WEll, the 7 times wasnt the only times I used the system last year... I did a fair amount of shows last year, and the year before. The amps are still holding up fine. Imm happy with my purchase.

I also know a few people that depend on their RMX amps every weekend everyone month of the year. Last I talked to some of them they are still holding up fine.

Yes, I know there are better amps, and Im sure there is a limit to their use, but Ive never had any problems with mine.
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Nathan Lehouillier

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Re: Best amp for pair of Labsubs (Poll)
« Reply #13 on: June 14, 2005, 03:53:27 pm »

 Well lets see if my plow can get threw your drift.
I have own 10 rmx's all bridged 4 ohms and I have
130-150 shows on them my only complaint is the cheesy
Vol. Pots. I have had to replace 4 of them and clean
the rest of them every two to three months.
I would compare them to Mx series in reliability any day.
The Mx's just have better vol. pots.
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jeffhtg (Jeff Kenney)

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Re: Best amp for pair of Labsubs (Poll)
« Reply #14 on: June 14, 2005, 07:20:44 pm »

THATS what i was looking for.. im just leary of alot of made in china stuff.. MX's were made in the USA - and i still have some that are years and years old
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dj-flexxx

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Re: Best amp for pair of Labsubs (Poll)
« Reply #15 on: June 23, 2005, 10:13:35 am »

i've always stuck to Crown amps for bass applications, there's a reason QSC doesnt give you a slew rate, plus the dampening factors way better with a Macro2400
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Al Limberg

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Re: Best amp for pair of Labsubs (Poll)
« Reply #16 on: June 23, 2005, 11:24:01 am »

A little reding might help you understand that the two "specs" you mention have nearly as much to do with performance as the color of the faceplate and whether the gain controls are knurled or plain.  

?;o)
Al


p.s.  I think maybe it's "damping" factor,not dampening.
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Nathan Lehouillier

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Re: Best amp for pair of Labsubs (Poll)
« Reply #17 on: June 23, 2005, 11:48:05 am »

I to misunderstood these specs.
You will improve your damping rate more by changing to
8 ga cable than increasing the amps damping factor.
And just so you know QSC does publish it's damping
rate on it's spec sheets.
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Michael 'Bink' Knowles

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Re: Best amp for pair of Labsubs (Poll)
« Reply #18 on: June 24, 2005, 05:16:10 pm »

dj-flexxx wrote on Thu, 23 June 2005 07:13

i've always stuck to Crown amps for bass applications, there's a reason QSC doesnt give you a slew rate, plus the dampening factors way better with a Macro2400


Malarkey. Both Crown and QSC offer amplifiers that work well with bass. One of the subwoofer shootouts held by LABsters determined that the QSC PL 9.0 PFC was the best amp for that application. Different strokes for different folks. Slew rate and damping? Just numbers for the marketing guys. Looks like you bought the story.

My impression of people who say one amp sounds better than another is that at least one of the amps wasn't powerful enough or voltage wasn't high enough. It's when the amp is pushed too hard when its sound signature changes from very very flat to something else.

-Bink
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Jeff Woodford

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Re: Best amp for pair of Labsubs (Poll)
« Reply #19 on: July 01, 2005, 05:52:58 am »

I've been running 4 LABs off 2 Crown vz5000 in stereo and it seems to be a good match.
I've only popped drivers once, 1 box went down because a t-nut came loose on a driver and made an air leak. Other than that they seem to be able to handle as much as i can give them. I cross em at 35hz though as i'm a little weary of going any lower at high power and to be honest don't need to go any lower, there is plenty of sub.

On the RMX amps, i've been powering my Martin W8C's at 4 ohms off a 4050HD for a year or so i have spanked the arse out of them in all maner of dirty illegal rave venues as well as cold damp fields and beer covered night clubs, never had a problem with em. for the cash they are damn fine amps. My old mids ran 3x12's at 2.66 ohm off the 4050's and they loved it.

Going to have 6 LABs out in a pack outside this weekend all running of Crown 5k's, first time in the UK, much looking forward to the results. Razz
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Gary Perrett

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Re: Best amp for pair of Labsubs (Poll)
« Reply #20 on: July 05, 2005, 10:19:21 am »

I have been running a pair of LABsubs on a 4050, 5 nites a week for 2 years. No outdoors, but stupid hot and muggy, smoke so thick you could cut it with a pair of scissors, and I kick the livin SHIT out of that amp, and a couple 2450's for mids, doing DJ 3 nites and livesound 2...every week...NO failures (except for the previously mentioned cheesy volume pots).

I have more trouble with my Crown MA 3600's and MT2400's than the RMX's.

A friend did fry one channel of and 1850HD but I know not of the circumstances of the failure.

Gary Perrett
Twilite Zone Productions
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jeffhtg (Jeff Kenney)

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Re: Best amp for pair of Labsubs (Poll)
« Reply #21 on: July 13, 2005, 03:24:52 pm »

you should have kept the 5000vz.. 2 labs per side in parallel mono is ungodly.. and it gives you room for 2 more on the other side Smile
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