Played one of these last weekend at studio101nola.com… MAN, what a sweet amp! back-to-backed it with my SF Deluxe Reverb, which is also there, and the Vibro just ran RINGS around the DR! The DR did clean chime better, but the Vibro had the sweetest brown tone I have ever heard. One thing did perplex us- by all accounts, the Vibro is a 30-watt amp, the DR 22 watts- but the DR was easily louder and had more head room. Both amps have a confusing history- the DR seems to have been “black faced-” the “Pull-Bright” function is disabled; the Vibro was apparently butchered by some misguided soul who wanted it to sound like a Twin (like I said, misguided) and then put back by a very well-respected amp tech in New Orleans. The only thing we could figure was the Vibro was de-tuned to be more brown, at the expense of power. We thought it was worth the trade-off. Wish I had my Ampeg Jet J12T with me, would have liked to A/B it, too. That amp has actually pissed me off- I though I was done with amp shopping. Now, I want a Vibrolux!

Wrong. This is not a piggy back cab, it is a 1-12″ speaker (8 ohm) combo. Additionally, there are single speaker piggyback cabs with 10″, 12″, and 15″ speakers, all 8 ohm.

That’s actually two 8 ohm speakers wired in parallel to get you 4 ohms. Like every fender piggyback style cab was wired.

The guy from Fender was probably confusing it with the later Vibrolux Reverb that had two 4 ohm speakers. My ’61 Vibrolux has a single 12″, 8 ohm speaker. I have Jensen P12N in it now, but originally it had an Oxford. My output transformer is marked “125A7A”, and is designed for an 8 ohm output, but iI have heard of early Vibroluxes where someone installed a 4 ohm OT at a later date.

I own one of these (1963, mint except for aftermarket speaker). I have a question about the speaker impedance though. Here it is listed as 8ohms. However, the guy I emailed at Fender thought it would be 4ohms. I need clarification!