I have to say sunn model t amps are simply the best amp I have ever used. Currently in my new band Pombagira I use two sunn model t amps, a 1st generation and a second generation red knob model t. The 2nd generation Sunn has lower frequency end to it and is fractionally louder. I run these two amps alongside an Orange OR120 amp from '75 and a Marshall JMP Mark 2 from '78. The combination of four amps and the subtle difference between makes of amp results in the most amazing range of sound. I play in a doom, stoner band coming out of London. A voodoo lab one in and four out means that this feat is actually possible. Worship the amp/worship the sunn. www.myspace.com/pombagiradoom