Join Date: Feb 2001
Location: Nokomis, Fl. USA
Mentioned: 2 Post(s)
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Moodyda, is that splitter an active device, meaning it's plugged into 120 volts. If so, suspect that before anything else. In fact if your Adcom amp is capable of 4 ohm output and your four speakers are 8 ohms (likely) you don't even need that splitter.
Did you disconnect all speaker wires and read ohms? But connected to that 4 in 8 out splitter your readings may be skewed. But if you read an open, the problem lies elsewhere. Your speaker wires will be indirectly connected to 120 volts only by induction in the Adcom transformer so no GFI needed except that in the garage the amp should be plugged into a GFI protected circuit.
The lagging current of an inductive load like a speaker, even with 2 or 3 way crossovers with small capacitors won't give you a shock when they are no longer connected.
Did you read voltage with your meter, both AC and DC? If it's gone, it may have been capacitive. But if it's still there, you need to remove it.