Re: Agony
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Joined: Feb 2009
Posts: 3,466
connoisseur
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connoisseur
Joined: Feb 2009
Posts: 3,466 |
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.
Pioneer PDP-5020FD, Marantz SR6011 Axiom M5HP, VP160HP, QS8 Sony PS4, surround backs -Chris
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Re: Agony
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Joined: Jul 2010
Posts: 233
local
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OP
local
Joined: Jul 2010
Posts: 233 |
Yes, here is the youtube video: http://www.youtube.com/watch?v=RWj5CUl7rioThe 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.
Axiom M80s + QS8s + VP180 <-- Pioneer VSX-1120-K <-- Squeezebox Touch / XBox360 / Oppo BDP-93
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Re: Agony
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Joined: Feb 2009
Posts: 3,466
connoisseur
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connoisseur
Joined: Feb 2009
Posts: 3,466 |
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.
Pioneer PDP-5020FD, Marantz SR6011 Axiom M5HP, VP160HP, QS8 Sony PS4, surround backs -Chris
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Re: Agony
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Joined: Dec 2008
Posts: 6,928
axiomite
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axiomite
Joined: Dec 2008
Posts: 6,928 |
So setting the gain at 100% would solve the problem(on A500)?
Half of communication is listening. You can't listen with your mouth.
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Re: Agony
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Joined: Feb 2009
Posts: 3,466
connoisseur
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connoisseur
Joined: Feb 2009
Posts: 3,466 |
Pioneer PDP-5020FD, Marantz SR6011 Axiom M5HP, VP160HP, QS8 Sony PS4, surround backs -Chris
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Re: Agony
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Joined: Dec 2008
Posts: 6,928
axiomite
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axiomite
Joined: Dec 2008
Posts: 6,928 |
Half of communication is listening. You can't listen with your mouth.
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Re: Agony
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Joined: Jun 2003
Posts: 8,488
axiomite
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axiomite
Joined: Jun 2003
Posts: 8,488 |
Geez, Adrian, just buy an amp for crying out loud.
bibere usque ad hilaritatem
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Re: Agony
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
Geez, Adrian, just buy an amp for crying out loud. Then you can cry out louder.
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Re: Agony
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Joined: Jul 2010
Posts: 233
local
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OP
local
Joined: Jul 2010
Posts: 233 |
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.
Axiom M80s + QS8s + VP180 <-- Pioneer VSX-1120-K <-- Squeezebox Touch / XBox360 / Oppo BDP-93
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Re: Agony
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Joined: May 2003
Posts: 18,044
shareholder in the making
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shareholder in the making
Joined: May 2003
Posts: 18,044 |
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.
I am the Doctor, and THIS... is my SPOON!
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