by new05002 » Thu Mar 08, 2012 11:55 am
also depends on if your talking Gen1 or Gen2 Model T originals, the reissues should have never even had the name Model T, its completely different than the originals and sounds nothing like them, whether or not the sound is good is up to you on the reissues, IMO i dont like it much.
Now the Gen1 originals are pretty much Superlead clones with 6550s running in ultra linear output with a large plate and screen voltage driving up the output power.
The Gen2s are a little more interesting then changed the tonestack to baxandall with an inductor based cathode mid control added on. this eliminated the cathode follower driving the tonestack and also modified the stage biasing as well. The master was changed to affect pre tone stack and pre phase inverter drive so the sound of the amp changed even from Gen 1 to Gen2.
the 1200s is the guitar version of the 2000s, the 4 x 6550 bass amp that Sunn made which was quite clean. so the preamp clean level is probably close to the v4 but again power levels all around can be a little different
Now the V4 is a totally different beast, with a much different preamp that is quite a bit more complicated than a Model T. It has 2 channels which are summed using anode mixing where each channel is identical. The EQ is a baxandall stack plus a multi tapped toroid inductor feedback based mid range control not unlike say an op amp control with a bandpass/bandreject filter where the mid notch/boost is selectable. The amp is quite clean till u crank it up a lot, for those with the non master volume models its unlikely they would achieve much amp clipping without really making the fucker loud while the master volume models (i have a v4 with a master) can achieve some grit before the amp is really loud. Its an awesome amp for pedals, period
I am unsure if you can achieve the same sound on both amps given the strong differences in circuits but probably with a dedicated pedal setup