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  #1  
Old 11-20-2010, 08:07 AM
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Join Date: Nov 2008
Location: Marlton, NJ
Recommend power amp for Tech 21 RBI and GK Neo 112s

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Hi -

Can you guys recommend a power amp to use with a Tech 21 RBI and 2 GK Neo 112s (300 watts each)? I've been looking at Crown Drivecore, QSC GX3 and GX5, Carvin, etc. Would appreciate any feedback. I play mostly bar/club gigs with an occasional outdoor gig, usually with no PA support on the indoor gigs.

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  #2  
Old 11-20-2010, 08:12 AM
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Location: NE CT
The new Peavey IPR1600 is super lightweight . If I didn't already have an older Carvin DCM1000 I'd pick one up myself.
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  #3  
Old 11-20-2010, 08:31 AM
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Quote:
Originally Posted by Roadkill
The new Peavey IPR1600 is super lightweight . If I didn't already have an older Carvin DCM1000 I'd pick one up myself.
Thanks! Will look into this one also.
  #4  
Old 11-20-2010, 08:43 AM
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Join Date: Jun 2009
Location: North Bend, WA
I play through a RBI /Carvin DCM 600/SWR 410 and it sounds great. Some off the newer carvin power amps are lighter but I have not used them yet.
  #5  
Old 11-21-2010, 10:34 AM
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Location: Winnipeg, Manitoba, Canada
Quote:
Originally Posted by jwn1969 View Post
Thanks! Will look into this one also.
Check some reviews on the Peaveys. I have heard these lightweight amps clip and overheat without being run very hard.
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  #6  
Old 11-21-2010, 10:43 AM
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Join Date: May 2008
Location: Dayton OH
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Quote:
Originally Posted by Geddyfleaharris View Post
Check some reviews on the Peaveys. I have heard these lightweight amps clip and overheat without being run very hard.
I feel like part of this would be due to not using the amps correctly. The low frequencies <40hz (approximately the fundamental of your E) are usually cut or rolled off by a high pass filter in amplifiers. A few that don't have this will seem underpowered when they're really just trying to amplify these super low frequencies that we can't hear. I believe SWR has this issue?

Anyways, I'd be interested to know if people are using the built in high pass filters when they report these results or if they're trying to amplify within the 10-30 hz range and creating flub while driving the amp and their cab too hard. The Peavey has a built in HPF but I'm assume it needs to be manually switched on/off or whatnot if I read the specs correctly.

Another thing to note is the frequencies and THD (total harmonic distortion) that each amplifier is rated at. Often these are manufacturer specific and somewhat non-comparable. Old crates rated at .5% THD where as Ampeg often used 5% THD and they both had the same parent company. Neither gave the pitch of their sine at rating. Peavey noted it's rating at 1kz. I don't know how much of a difference that'd make, but I'm sure it has some effect.

Last edited by christw : 11-21-2010 at 10:46 AM.
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