can you elaborate further? not sure exactly what that means.
JimmyM - first let me restate - I am an Ampeg man and I really do respect your opinions and knowledge on all that is ampeg. I'm still looking for the perfect fliptop for some stuido work I'm planning.
All that said, my first practice amp was an ampeg combo and I just kinda got hooked on the tone. Nothing else really sounds exactly like an Ampeg rig to me. I tried some other tone monsters (i.e. the Aguilar DB750/GS412 combo and the Mesa 400+/Mesa610, etc.) but never found anything that spoke to me like an ampeg. So I traded in my main rigs and bought an new Ampeg SVT-VR (looked for a mint condition blue line but gave up after a few months). I paired up the SVT-VR with my Berg HT322 (a really great smaller cab) and liked how the Berg let the Ampeg sound come thru without coloring it too much but the HT322 was much too hifi for the SVT-VR, I wanted that classic early '70s rock tone.
So after reading a number of posts on TB that compared the NV610 favorabily with the Ampeg 810 I took a low cost plunge on a used rat fur NV610 in mint condition. Knowing how much I like the classic Ampeg sound I figured if I didn't like the Berg I could flip it out for what I paid.
I played thru that for well over a year and really liked the sound and volume I got with it. About a year ago I wondered what I was missing by not having an 810 so I went to Guitar Center and bought one new (this was in the last year and it was new, so I assume it was an 810e) I hooked it up along side the NV610 and played the hell out of both of them with the SVT-VR for the better part of a week.
I used every type of guitar I have (vintage P bass, Pedulla fretless, Alembic, Stingray's, Jazz basses, Reverend rumblefish, single coil teles, acoustic electric, 4 strings, 5 strings, active, passive, round wounds, tapewounds, flat wounds - heck I even ran my stratocaster and les paul guitars thru them).
In nearly every case the NV610 had the same Ampeg snarl, growl, punch and feel of the Ampeg 810. I even set them to the same sound levels in a studio environment, turned my back on them and had my wife swap cables back and forth. It was difficult to tell them apart, in fact I wasn't even sure which one was the Ampeg or the Berg. But I did notice that one of them consistantly had a slightly more distinct or slightly more well defined tone. That's the one I chose - it was the Bergantino NV610.
So in my experience the NV610 is an Ampeg 810 knockoff in every regard except looks and bulk. I do like the looks of the Ampeg better and wish my Berg grill matched my SVT-VR grill. I've thought about getting some Ampeg grill cloth and putting it on the Berg but haven't done it yet.
The only test that I never got a chance to do was an Ampeg 810 vs Berg 610 outdoor full volume chest pound. I do wonder if the Berg with 2 less speakers and the associated lack of surface area could keep up the the Ampeg.
Again, I'm an Ampeg guy and the reason I bought the Berg was it sounded like the Ampeg and was lighter and less bulky. The tonal differences we're not huge. Had it not sounded like the Ampeg I wouldn't have kept it.