I recently bought a 90's Ampeg Reverberocket R-212R (with 6L6 output tubes) and have a question about the speakers.
They are only labelled as "Ampeg" and provide no wattage or impedance info on the label. What is the wattage and impedance? Are they in series or parallel?
What is an equivalent speaker for replacement if you were replacing just one? What speakers would you recommend for a "jump" blues player? I might buy a new pair if I can find some that are lighter and have that crisp sound that it is now producing. Neodynium?
They are only labelled as "Ampeg" and provide no wattage or impedance info on the label. What is the wattage and impedance? Are they in series or parallel?
What is an equivalent speaker for replacement if you were replacing just one? What speakers would you recommend for a "jump" blues player? I might buy a new pair if I can find some that are lighter and have that crisp sound that it is now producing. Neodynium?
The original speakers were Jensen, the model and specification, is online. You can tell by looking at them if they are series or parallel. The ReverbeRocket never used 6L6, the most common was 6V6. 6L6 will destroy the mains transformer due to the heater current!
7591A was used originally with a 5Y3 rectifier then 7868 with solid state rectifier followed by 6V6.
I would fit Jensen Blue speakers or Eminence Beta if you cannot afford Jensen. The wattage is not important as the amplifier only produces 20Watts or so.
7591A was used originally with a 5Y3 rectifier then 7868 with solid state rectifier followed by 6V6.
I would fit Jensen Blue speakers or Eminence Beta if you cannot afford Jensen. The wattage is not important as the amplifier only produces 20Watts or so.
I am inexperienced with this forum and apologize if my post is in the wrong area.
Could you point me to the correct area?
TIA
Incredible, Jon. You should contact Ampeg immediately and correct them as they are dispensing incorrect information. I am attaching their "wrong" user manual stating that the wattage is indeed 50W and the output tubes are indeed 6L6.
Just incredible. Your post did not correctly address one question.
From having serviced these types of guitar amplifier in a past life, your 90's version does, in fact, use 6L6GC output tubes. The original (vintage) rockets had smaller tubes and point-to-point wiring on a tag board. These are the expensive and sought after ones. I'm not sure just when the "reissued" versions began, but yours probably is. That's why the 6L6GCs. And according to pictures on the web, the speakers are in parallel.
Attachments
Thanks so much for a germane post.
Most dual speakers are in parallel so, if one fails, the other carries on, yes?
The speaker "spec" from Ampeg (in my attachment) is for both the R-12R and the R-212R and calls out 8ohm, but I fear that that is for the single-speaker model. I find it hard to imagine that Ampeg uses two different output transformers for the two models, but find it equally hard to imagine they would allow that kind of impedance mismatch too.
My thought is that they might use two parallel 16ohm speakers for the R-212R, but there are no markings on the speakers. Thus, my query -- in the wrong forum section, I am told.
Yes, mine has the signal going through op-amps on a PCB. The problem is the original Reverberocket doesn't have the power of the 6L6's. I guess I really want a Twin Reverb, hmmm?
Thanks again for the insights.
Problem Solved
With a dental mirror and a flashlight, I found a small label on the underside of the magnet. The speakers are 16ohm as suspected.
Sorry again for the mis-posting. Can anyone tell me where this should have been posted?
Anyone? Anyone? Beuller?
With a dental mirror and a flashlight, I found a small label on the underside of the magnet. The speakers are 16ohm as suspected.
Sorry again for the mis-posting. Can anyone tell me where this should have been posted?
Anyone? Anyone? Beuller?
Yes to the first part above.
I'm no longer an expert on these amps because I've been away from them for years. But it's all pretty simple stuff in general. Maybe they used a tapped secondary for either four or eight ohm speakers. Maybe they compromised the secondary impedance for six ohms. This way the mismatch would be less but within acceptable working tolerances. The O/P transformer part numbers would shed some light on this if they are the same of different. In any case guitar amplifiers are not as critical as hi-fi to their load. There are few absolutes. Many choices in amplifier design are a compromise depending on ones goal.
Ok, just saw your last post on the speakers. Good work. Where to post: top of page>"forums">"live sound">"instruments and amps".
I had that amp in the 90s.
It has 16 ohm speakers. Mine was a EL34 model. Power caps went bad quick...I replaced the WIMA coupling caps w/mallory 150's. I replaced one speaker w/a greenback which was obviously less sensitive. Sounded pretty good.
It has 16 ohm speakers. Mine was a EL34 model. Power caps went bad quick...I replaced the WIMA coupling caps w/mallory 150's. I replaced one speaker w/a greenback which was obviously less sensitive. Sounded pretty good.
The forum referenced by others is Instruments and Amplifiers where I have moved this thread.So did the Mallorys make a noticeable difference to your ears? I looked at all the op-amps in the signal path and just assumed that the caps were the least of my worries. I really am interested in your experience.
The Greenback is a 25W speaker, yes? Do you know the wattage of the original Ampeg? I realize that you don't necessarily match wattages, but I still want to know.
TIA
The Greenback is a 25W speaker, yes? Do you know the wattage of the original Ampeg? I realize that you don't necessarily match wattages, but I still want to know.
TIA
I am really curious about your coupling cap experience. Did the Mallorys make a noticeable difference to your ears? I saw all the op-amps in the signal path and thought that the caps would be trumped by all the ICs. Big difference?
Any idea what the wattage of the original speakers are? 25W would be sufficient for a pair. Any idea?
Any idea what the wattage of the original speakers are? 25W would be sufficient for a pair. Any idea?
Depends what Wima's he had. M150s are not bad at all though. If you can get a hold of the good 6l6s for sure use em.
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