Some early run Limpet amps require modification to correct ground loops when using UNbalanced cabling. The amps affected carry serial # 540049 thur 540095 and 540101 thru 540143.

NOTES:

1)The AMP serial # is different than the SPEAKER serial #.

2) You must remove the amp to find the amps serial #.
There are 6 hex head socket bolts and the wires from the amp to the speaker are VERY short, so be careful.