Super Reverb ext speaker

Joe E · From: Houston Texas

How is the ext speaker jack on a Super Reverb connected. Ser or par ?

The schematic looks like parallel but I can't imagine connectings a parallel load to this amp.

Joe

Jay Fagerlie · From: Lotus, California, USA

It should be connected parallel with an internal switch to disconnect the main speaker jack when you use it.
That's the way they are usually set up.

Jay

Ken Fox · From: Nashville GA USA

Other than the Ultra-linear output transformer models (late seventies and early eighties, the speaker jacks are in parallel. I would never hook-up an extension to it either! As it is a 2 ohm load, anything else added in parallel is a near dead short to the output transformer.
Why Fender put an extension jack there is a mystery. Perhaps because it is the same chassis and almost identical electronics used for the Vibroverb (8 ohm load amp) and the Bandmaster Reverb head (4 ohm load amp). Then again, those amps were not around in the Blackface era!

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