You are here

Amplifier Help

For performing musicians and engineers: stagecraft, engineering and gear.

Amplifier Help

Postby Crazy Callaway » Mon Mar 05, 2012 1:34 am

I have 2 Peavey SP-2Ti's Sound Reinforcement System (Max Power: 600W RMS / 300W RMS) & 2 QSC KW122 1000 Watt 12 Inch 2-Way Active Loudspeaker, but the on-board amps for the QSC's are both out. I'm very new at live audio, so I was wondering what would be the best amp set up to run all 4 of these speakers???
Crazy Callaway
Posts: 1
Joined: Mon Mar 05, 2012 12:00 am

Re: Amplifier Help

Postby Bob Bickerton » Mon Mar 05, 2012 4:37 am


The first question to ask is why are the amps on the KW122 speakers out? I'm not familiar with the Peaveys but a quick look online would leave me to believe the QSCs would sound way better!

Also the KW122 are designed to be active speakers - no easy way to power them from an external amp - and why would you when they sound so good driven by their custom designed internal amp with all the processing and protection you you want.

If you're having difficulty connecting up the QSCs maybe give us a full breakdown of your set up, maybe we can help.

User avatar
Bob Bickerton
Frequent Poster
Posts: 2943
Joined: Fri Dec 20, 2002 12:00 am
Location: Nelson, New Zealand

Re: Amplifier Help

Postby Mike Stranks » Mon Mar 05, 2012 10:05 am

I'm with Bob :D

... but in your 'report back' please let us know if the QSCs have ever worked for you and, if so, how did they fail? Did they make any pfft noises, emit smoke or smells or what? If you connect them to mains-power now do the lights come on and can you hear anything at all if you GENTLY increase gain/volume?
User avatar
Mike Stranks
Jedi Poster
Posts: 4378
Joined: Fri Jan 03, 2003 12:00 am
Location: Cirencester, UK


Re: Amplifier Help

Postby grab » Mon Mar 05, 2012 12:15 pm

That reminds me. A friend of mine sold some fairly decent powered speakers to a local promoter (he needed the money to finance a Musicman bass, IIRC). Some time later he happened to be at a gig organised by that promoter, and was told that the speakers were rubbish. My friend had a look at them, and found that the promoter had taken a power amp and hooked up an outlandish chain of adaptors to get from Speakon outs to the speakers' XLR inputs! One speaker's power amp was toast, and the other was distinctly unhealthy.

Never underestimate the ingenuity of incompetence. (Remembering some of the ways I've screwed up, I completely count myself in that too!)
Frequent Poster
Posts: 2381
Joined: Sat Jul 07, 2007 11:00 pm
Location: Cambridge, UK


Who is online

Users browsing this forum: seablade and 3 guests