It's a modeling amp - it uses digital technology to emulate various classic amps. So it has a setting for 'Fender Blackface' and 'Vox AC30', which are intended to sound like the originals. It also has some built in effects. The unique thing about the valvetronix series is that they actually use a valve/tube for this modeling. This may be a marketing gimmick, or may be an essential part of the technology. Either way it gets pretty good reviews & is known for being very responsive to your playing(pick harder & it distorts more) I have the 15 watt version and I use it as a practice a
