How much DC is considered safe?

An 8 ohm speaker with 32mV across it would dissipate 128 microwatts or .000128 watts. I think you are safe.

Plato:
In short-0
But-My understanding is that measuring dc with ac present usually results in unreliable readings. Especially true with most garden variety digital meters. Probably not to worry over those readings. Tweeters generally safe from low amounts because of the caps. Do you hear any pops from the woofs when you fire them up?

There are more tech oriented forums than here. As a failsafe try asking your Q at the Asylums DIY page or bottlehead.

The world ain't right when Plato is taken rif from Clueless.

Great parting comment, Clueless :^)! Anyone here monikered Aristotle??? Cheers.

Thanks guys. I think I'm fairly safe at the level of DC the amps exhibit, but was just wondering at what DC voltage threshold would one need to be concerned?

If anyone here can answer that, by all means do so, otherwise I may do as Mr. Clueless suggests and pose my question in a more technical forum. BTW, that parting comment should have read, "takin' riff" not "taken rif." ;P