Zenith Cobramatic Stroboscope - Muffled Audio?

[Dubis7]

Just for sake of an update, I think I have a plan worked out. It's a bit convoluted so bear with me.

I've been wrapping up a restoration project on a Norelco EL3542. Thing's basically done, I'm just seeing if I can quiet down the takeup reel clutch before I haul it back up to my office.

A few days ago, I picked up a Wollensak T-1500. Unrestored, but it came with an adapter cable that allows a 1/4" audio jack to connect to an external source using alligator clips.

So - knowing that the Norelco is tested and sounds great, and with that cable in hand, I should be able to comfortable check the speaker on the Zenith and then work my way back to the amplifier to see if I can narrow down the source to a speaker or amp issue. Worst case, if it's the amp I can crack that open and see about sorting out the issue.