Bergantino NV412 or 610, but b##gered if you'll find one at that price.
Other 610s....
Ashdown, Warwick, .........
Other 610s....
Ashdown, Warwick, .........
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Honestly, at that price, and if you want to stay in the Ampeg family, a used 810 is your best bet. It gets a lot of speakers moving and some closer to your ears vs your knees. 2nd may be the svt212av, but that breaks the budget, likely even used.
For me, especially for outdoor gigs, with the V4B, only the 810 could hang. 100w tube without a ton of speakers behind it ran out of gas. And, the sound is heavenly.
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Get an Ampeg 810 cab. You won’t be disappointed.Hello all,
I'm currently using a v4b reissue with 2x 210AV cabs. It has great tone but Im looking for more attack and bass impact with more headroom and volume. Can anybody recommend a reasonably priced cab to add to this setup that has experience with such? I thought about adding another 210av but I don't think it will get me where I want to be; They just don't put out much bass.
Mine tooThe V4B on top of two 212AVs is one of my all time favorite rigs.

Is anyone running KT66 or EL34 power tubes?
The 66 would be interesting. I tried KT88 on a 70’s V4b but changed them out quickly.Is anyone running KT66 or EL34 power tubes?
Is anyone running KT66 or EL34 power tubes?
To what end? You won’t get more power out with the same output transformer and it’s questionable whether the power transformer could handle the increased heater voltage. On the vintage amps running 6550, EL34, etc, causes the PT to run excessively hot. I’ve owned three vintage V4s including one with a 6550 conversion, the sound was pretty close between them, likely more down to preamp tube differences and component level drift/variance as much as anything. But the 6550 amp ran significantly hotter, you ideally wanted to run it with a fan. Who knows what the modern reissue PT can handle.
I wanted to ask the question again if anyone here has experience with the SVT-15 E/EN cab and SVT-210AV cabs specifically with the V4B. What are the sonic differences between the two cabs? Do you think they would pair well together?
15e is deeper in lows and less bright. Which is fine, but I favor the rolled off and slightly brighter tones of the 810e and I get on extremely well with the 210av no matter what amp I use.I wanted to ask the question again if anyone here has experience with the SVT-15 E/EN cab and SVT-210AV cabs specifically with the V4B. What are the sonic differences between the two cabs? Do you think they would pair well together?
I know a couple folks on here who used to do that, although most just used the same amp. Only thing I would caution about is that the 210av speakers are medium duty so don't be blasting insano with the micro amp.Awesome, thanks for the feedback. How about this crazy idea.....: I'm thinking of adding 2 more SVT-210AV so that I can make up to a modular 8x10 system depending on the size of the gig. Additionally I was thinking of adding a small class D amplifier to "multi-amp" the speaker array using the line out on the V4B into the power amp. The idea is that I could blend in the clean power from the class D amp for clean lows and additional power to driver the speakers to whatever level is required while also retaining some tube flavor and drive from the v4b. Does anyone see any issues with this in regard to impedances and driving the same speakers in parallel from two different amps? Any power amp only recommendations with a line input "thru" so I could still output to the board for PA support? It's a lot and pretty wild, I know.