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RE: Bias settings in solid state amp? adjustable, and higher would be more class "A"...?

One really needs to be careful here. I converted a pair of Threshold S300 (150 WPC Class AB) to a SA/3 (50 WPC Class A), and yes, it does sound (subjectively) better. However, the conversion involved the following:

• Changing the output rails from the power transformer to a lower voltage
• Changing the rail fuses to accommodate the higher current
• Adjusting the bias and DC offset to match the new parameters

In general, the designer of the amp takes all of this into account when the amp is manufactured. So, just bumping the bias up could have a number or unintended consequences as a result (mostly failure from too much heat).

A safer method here may be to simply see if you can borrow a Pass Labs XA amp for a listen. That way, you can hear the effects of high bias first hand, and hear for yourself.

" Don't look back. Something may be gaining on you"

Satchel Paige


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  • RE: Bias settings in solid state amp? adjustable, and higher would be more class "A"...? - Freo-1 05:31:31 05/05/12 (0)

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