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In Reply to: RE: my god; much respect for these Emotivas posted by Satie on January 28, 2016 at 18:39:24
Unless I am missing something in the XPA1's here are no such options. There may be in the second generation version which claim Class A and Ab power.
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The Amt of class-A bias needed will be affected by speaker impedance mag/phase, fans as suggested are essential because its the most cost effective way to control heatsink temps with out a total revamp, there are also other factors involved that will limit how much you can actually increase the class-a operation by, but if you are driving loads below 8 ohms you will benefit from some increase in Class-A operation, absolutely knock some of that glare off.
Regards
Hi: Can you be specific about what I should do? Purchase a small fan for each amp etc? Sorry. Do not quite understand. MAgneplaner 1.7 uses a 4 ohm load fairly consistently but can drop to 3 ohms. Thanks
You would need a fan for each amp and work out a way to have them blow over the heat sinks in a permanent arrangement. Then take the amp in to an electronics repair shop that does pro audio or audiophile equipment and have them raise the bias on the amps to 20 to 30 watts. Consult with them about how high you would want to go realistically. I prefer having the techs rig up the cooling.
There is a bias pot inside and the fan installation should be done by a pro. The point is that given convective cooling the amp has enough cooling capacity to handle operation well into class A as opposed to a couple of watts as it comes out the factory.
I have played with bias for every SS amp I used on the midrange. I have yet to come across one that didn't sound better with higher bias despite the fan noise and vibration.
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