I just purchased a GFA 5400 Amp and only 1 channel is working - Seller claims it worked when he Shipped. Is there a way to test the channel that doesn't work? Right Channel works Great!

Check output transistors

THE AMP HAS 4 FUSES INSIDE, 2 PER CHANNEL. YOU NEED TO CHECK THESE FUSES. BE CAREFULL, HIGH VOLTAGE- UNPLUG POWER CORD AND LET THE AMP STAY FOR COUPLE HOURS. REPLACE ONLY WITH PROPER VALUE FUSES 5AMP. IF BLOWN AGAIN, NO MORE ATTEMPT TO REPLACE - YOU NEED TO SEND IT TO REPAIR FACILITY LIKE THIS

no this AMP is not bridgable to get more power out of this amp you need 4 ohm speakers.

Power rating
1 - 150 watts into 8 ohm speakers
1 - 225 watts into 4 ohm speakers

Hi...

I've contacted ADCOM before and they sent a pdf of the electricals

http://www.adcom.com/default.aspx

also try:

www.stereomanuals.com

I would contact Adcom for a service place near you

Connect the two speakers in parallel. That will present a 4 Ohm load to the amp.

Dan

This amp is not designed to be bridged and can not be used in the mode you wish. Sorry, but internal circuit changes would be necesary for the amp to work as a single channel.

Dan

Try just the power amp on ..nothing connected
no Dakiom thingy either. It's a matter of elimination. Start at the output device and work back. Keep the Dakiom out of the loop.
If there's hum with just the Adcom..then it's the ADCOM

First of all, when bridging an anp, the impenence that it can handle usually goes UP not down. I don't believe that the GPA555 can be bridged without circuit modification.

Dan

Use the niles for more than one speaker hookup. As far as the sub hookup, use a powered sub with speaker inputs
then use the right or left speaker and tag a couple wires to the sub. Good Luck
BIGRED