amp called the JVM410HJS which features noise gates in place of reverb on the front panel. Around the same time as the release of the JVM, Marshall also released an amplifier called the Vintage Modern, which is designed to be much simpler, with a single channel and designed to be controlled more by the player's style and guitar than by channel switching or multiple settings, reminiscent of the vintage "Plexi" and JCM800 range, but with modern conveniences such as foot-switchable dynamic ranges (distortion levels), effects loop and reverb. The Vintage Modern series consists of the 2466 100-watt head and 2266 50-watt head with matching combos and a matching cabinet loaded with G12C 25-watt Greenbacks. The Vintage Modern is the first Marshall since the late 1960s to be powered by KT66s, a European version of the 6L6 valve. Vintage series In 2001, Marshall reissued many of its earlier amplifiers, such as the Model 1959-SLP, which is designed to be a reissue of the late-1960s era "Plexi" amplifier, but which are in reality reissues of the post-1973 Super Lead models in that they use printed circuit boards internally to reduce manufacturing cost. The original design utilised hand-wired circuits on turret boards, which is now available for a premium in the "hand-wired" series. Other reissues are similarly PCB designed, even where the originals were hand-wired, except where explicitly noted (i.e., the "hand-wired" range currently offered). Solid-state amplifiers Marshall's "Valvestate" amplifiers contained a hybrid of valve and solid-state technology. Currently named the "AVT series" (although these are now out of production, being replaced with the "AVT tribute" for a short time), there are a number of different models, all of which are less expensive than their all-valve counterparts. It is Marshall's current line of "hybrid" amplifier, featuring a 12AX7 preamplifier valve employed in the preamplifier (to "warm up" the signal) as well as solid-state components, with a solid-state power amplifier. These are considered and marketed as intermediate-level equipment to bridge the gap between the higher valve range and lower range MG series. In January 2009, Marshall released their latest variant of the MG line of practice amplifiers. Replacing the MG3 line, the MG4 has been designed to offer the guitarist a whole host of features whilst keeping the control of the amplifier simple. Bass series Marshall currently manufactures a professional, all-valve bass rig called the VBA400. It houses eight 6550 power valves plus three