Wondering if anyone has seen the insides of a Black Jack 21 MKII and how close it is to an ODS circuit? The price is nice and they seem to. K views · 5 years ago. 21 watts of classic rock and blues tone take you from studio to stage, night after night. Pair the head up with one of our. Blackjack™: 2 x 6V6 Watts Class AB 3 x 12AX7 Preamp tubes. . The Blackjack 21 MKII is powered by 2 x 6V6 tubes and 3 x 12AX7 Preamp tubes. At 21 watts of tube power, this amp can handle studio and stage volume. Today we take a look at the Fuchs Blackjack 21 amp Support us on Patreon! / zimmsguitars. Available as a head, or combo. This amp hits a nice sweet spot between tone and affordability. The Blackjack is one of our best selling amps in our companies history. With a non-master volume clean channel and overdrive channel with input gain control, the Fuchs Blackjack 21 lets you dial in a perfect amount of tube grit. . The 12”. Fuchs Blackjack 21 Demo. Fuchs Audio Technology Casino Blackjack 21 Watt 1x12" Tube Guitar Combo Amp · Watts: 21 Watts of Class AB power · Tubes: 2 x 6V6 Watts Class AB, 3 x 12AX7. Fuchs black Jack 21 MKII Play through with a Fender Strat and a PRS S2 Signal chain- x2 Marshall 4x12's mic'd with a Shure Sm 57 and an AEA. Many boutique amps are over $2,, but the Blackjack head can be had for around $, but is.