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On the inside back wall of the 1986 Adcom GFA-555 Stereo Power Amplifier there are four fuses,two for each channel. Would you tell me please, what amp fuse they are and if they are the fast or slo-blow type? I paid for this once and got no answer. Please check your records for the credit card information that I sent to your web site!

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Original are AGC 6/250v acting fast fuse

Posted on Jun 25, 2015

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Sorry to contact you this way but i've spoken to an older colleague of mine and it appears that before 1992 in the Adcom GFA-555 they were using bipolar transistors and the amp was rated fo a minimal impedance of 4 ohms - not like in the newer ones that have MOSFETs and are rated for 1 ohm in bridge mode. So the fast fuses that you need are of 6 amps , not 20 like in the newer models.
Sorry for my mistake.

Posted on Jul 12, 2010

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