The X100B series valve amps were a mainstay on many arena stages and MTV videos throughout the 1980's. Artists such as Frank Zappa, Craig Chaquico with Jefferson Starship, Warrant, Warren Cuccurullo with Missing Persons, and Steve Vai all played X100B amps. Frank Zappa raved about the Clean channel on this amp. Steve Vai recorded a song called "Blue Powder" featuring the X100B. The release of Series IV includes a master volume switchable to boost mode and a 4 button optional footswitch with LED indicators (Channel, Effects, Reverb, Boost). As a tribute to the original X100B amps, the new Series IV is badged with the vintage Carvin logo.

The X212B combo has all the same features of the X100B head in a 2 X 12 package. It's loaded with 2 Celestion Vintage 30 speakers speakers for that great vintage tone.

- Dual channels: Clean & Lead
- Master volume with switchable boost
- Bass, Mid, Treble, Presence and Reverb controls
- 5 band graphic EQ assignable to clean or lead channel
- 25/50/100W output switch
- Bias switch for 5881, 6L6GC’s or EL34 power valves (supplied with EL34)
- Loaded with 2 Celestion Vintage 30 speakers
- Cabinet voiced XLR balanced output
- Foot switchable Effects Loop
- Four–EL3 4 & 3–12AX7A
- Weight: 27 kg
- Made in San Diego, California