Axiom Home Page Forums General Discussion The Water Cooler Agony

The distortion was actually due to the 0-cross, push/pull of the class AB design. It occurred when the gain was set near 2/π (63.66%). It's actually a pretty common design flaw in variable gain AB amps.

Yes, here is the youtube video: http://www.youtube.com/watch?v=RWj5CUl7rio

The only way I would be able to tell for sure if I have "higher than spec" distortion is to measure it with equipment like that.

Oh, most separates don't offer continuously variable gain. Some have no gain selection at all, and always run 100%. Other's have different amounts of gain depending on whether they are run single-ended or differential (RCA or XLR). Other's have selector switches for a discrete number of gain settings.

So setting the gain at 100% would solve the problem(on A500)?

Yeah, it would.

Tks, Chris.

Geez, Adrian, just buy an amp for crying out loud.

Then you can cry out louder.

The EPQ1200 is rated 425 Watts RMS, 600 Watts peak, into 4 ohms.

The Axiom M80 specs say, "Max Amp Power: 400 Watts". Is that RMS or Peak?

Trying to decide if I should set max gain and be careful with the source volume. With the source at 100% the gain at 28 was scary loud -- I don't want to experience 32.

Don't stress on that. Axiom tests those puppies with >kilowatt amps--and you're unlikely to get anywhere close to 400W output without your head melting.