Goertz MI2 and amp oscillation

Pops, you are lucky. Several of my amps have no protection circuitry in them by design. If i forget to attach the zobel networks, up in smoke they'll go. I caught one screw-up as i could literally smell the amp "cooking". This was only after about 1/2 an hour or so of idling after being connected and powered up. Would have been an expensive "oversight" if i had left the house for a bit or something else came up. That is why i try to stress the importance of using the Zobel's if unsure. As in your case, you might not have tell-tale signs instantly, but that doesn't mean that the amplifier likes it long term. Better to be safe than sorry. Sean
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Has anyone noticed ANY change in sound quality using the Zobel jumpers? It just seems like it must affect the sound to some degree.

I haven't noticed any difference at all - I've listened to them both ways they sound great.

The factory supplied Goertz networks are designed to come into play at 160 KHz. As you might guess, this is WAY out of our hearing range of what is supposedly 20 KHz. Since i only know of one speaker that actually could make it out to 100 KHz, i don't think that we have to worry about the results being audible. Shoot, many components and most sources are way down by the time they get to 100 KHz let alone 150+ KHz. In fact, some are specifically designed for very limited bandwidth. Sean
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Just another note on goertz networks - use them! My amp was idleing last night and when I went downstairs to shut down I noticed it was fairly hot, like it is when I use it for an extended time or my Thiels put it to task. I checked connections and 1 of the networks had slipped off a binding post from moving the speaker. These are fantastic cables. However, it's hard to believe only 1% of all amps oscillate with these - I use a Classe and fortunately they are very stable and have a protection circuit.