are extremely difficult to find in the aftermarket. Rockman Guitar Monitor The Rockman Guitar Monitor is a Guitar Stack that can be used with the Rockmodules or XPR. It was introduced in 1991. The components include a Rockman PA500 amplifier (a modified Carver PM175 2x250-Watt), up to four linear 3-way cabinets and stage head that provides mounting for the amp, pre-amp and other rack-mount components. Studio Series The Studio Series consists of two 19-inch rack-mount systems that were both briefly built in 1991. This includes the Pro Bass Rockman and PGE-2 two-channel programmable equalizer. Only around 20 of the Pro Bass Rockman were made. Just ninety-nine PGE-2's were made. Pro Bass Rockman The Pro Bass includes compression and a 9-band graphic equalizer. A foot-switchable 3-band equalizer can also be used to change the EQ during a performance. It has an onboard stereo chorus, overdrive, tape input, tuner output and headphone output. PGE 2 The PGE 2 is a 1U rack-mount, two-channel, MIDI programmable graphic equalizer. It includes two complete 14 band graphic equalizers and input/output overload indicators. The controls are fully programmable with up to 100 presets. Ultimatum The Ultimatum products are based on two distinct clipping stages in series. The first part of the Ultimatum circuit has a compressor, clipping stage and cabinet simulation. A second clipping stage simulates the saturation of a power section in an overdriven tube amplifier. Both the A12-50 combo and Ultimatum distortion generator are based on this circuit. A12-50 combo The A12-50 combo was released in 1993. It is a two-channel (distortion and clean) 1x12 50-Watt mono combo. It lacks the chorus and reverb of the other Rockman products, but provides an effects loop for using external effects. It is probably the most conventional of the Rockman guitar amplifiers. Distortion generator The Ultimatum Distortion Generator was introduced in 1994. It was designed primarily for use as a distortion with a standard guitar amplifier. It can also be used as a pre-amplifier for directly connecting a guitar to a mixing console. Final Products Acoustic guitar pedal The Acoustic Guitar Pedal was released in 1994, designed for clean guitar work. It is basically a compressor with bass and treble controls. It is intended to make an electric guitar sound more like an acoustic guitar. The Acoustic Guitar Pedal was produced by SR&D and Dunlop. The SR&D version can be identified by its grey button. The Dunlop