I had several of John Iverson's amps including the Electro Research and the Eagle 7s. This was a long time ago, however, and regardless of how good I found them then, they are probably surpassed today. For example I use a Citation 7.1 four channel amp on my subwoofers. I bridge the left and right two channels. I had actually looked for my old Eagles when I needed a subwoofer amp, but could not find them.
John's amps are rather straight-forward so I think someone competent in circuits could repair them.
John's amps are rather straight-forward so I think someone competent in circuits could repair them.