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Ampeg Rocket Bass Combos

The RB112 seems the obvious choice although I checked the manual and it is slightly larger all round than the PF112HLF, not sure I could stack them...

It would be interesting to find out how the 100w RB112 compares for volume with my PF-50t + PF112HLF.
No extension speaker capability for the RB-112. However, I do own this amp and it is really loud for a 100 watt amp, especially with the SGT engaged.
 
Well, there is a drummer in there and the guitarist is using a Fender GTX 50!! Trouble is, you just begin to hear the bass rumble only and can't really distinguish the notes during a song (fills). Then, I pull out my Fender 800 Stage with the Fender NEO115 and it's a different ballgame. Yes, I was wondering if the RB-115 + the "210"; I was actually wondering if the Ampeg Portaflex PF-115LF (400w) would be a "better" choice for a cab?
 
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It's a good observation. The Rumble 500 is rated at 350 watts at 8 ohms, and the RB-210 is rated at 250 watts at 8 ohms. Both are 500 watts at 4 ohms.

I wonder if both are similar loudness without extension cab, and Rumble is over-estimating watts while Ampeg is under-estimating watts. Or is the Rumble 500 truly louder.
There is actually not that much difference in volume between a 250 and 350 watt amp. The math says that doubling the wattage will only get you about 15-20% more actual volume with similar enclosures. You would need to actually triple your power for your bass amp to have a significant increase in perceived actual volume (about 10 db).
 
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Eighty-five bleepin' pages. It is obviously obvious that Fender scored such a hit with the new Rumble series that other companies want a piece of that.
We hear good reviews on the Rumble and it sells, but the name “Rumble” has always puzzled me. You’d think Fender marketing people would have been able to come up with a better name, I don’t know a bass player anywhere who wants to sound rumbling, lumbering or bumbling.
 
Second rehearsal even better!! Used it at band rehearsal in the garage, with loud lead guitar player, not-as-loud rhythm guitar player, and drummer who uses rocket sticks.
Master volume at 2 o'clock, no use of SGT. EQ at 12 o'clock for all three.
I moved to standing beside the loud player and his amp with the 110 pointed at me, and was not overwhelmed at all. He, who is a big of a gear snob, said it sounded amazing for $115.
 

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