lineup is to put the Stereo Echo after the Stereo Chorus. The Stereo Chorus was introduced in 1987, following the Stereo Chorus/Delay in the Rockmodule lineup. It is a dedicated analog chorus and adds foot-switchable controls for long-chorus and sweep stop. The Rockman Guitar Compressor is a professional quality compressor tailored for use with guitars. Since many of the Rockman products include a compressor (Headphone amps, Sustainor, Distortion Generator, XP Series, Acoustic Guitar Pedal and Ultimatum based products), this effect is primarily intended to add compression when it is not provided by other equipment in the signal chain. The Rockman Smart Gate is a dedicated noise gate that builds on the noise gate technology in the Rockman Sustainor. Control devices The control devices include the Midi Octopus and Dual Remote Loop. The Midi Octopus is used for controlling other effects. It could be used with a Midi pedal board, or be controlled by a Midi sequencer. The Dual Remote Loop is used to interface effects and amplifiers that can't controlled by other means. XP series The XP series started in 1989 as a rack-mounted programmable preamplifier called the XPR that was intended for direct connection to a full-range PA system. There is a three-band EQ that allows pre-distortion changes to the EQ. The clean signal can also be mixed with the distorted signal. The distortion is followed by a second 5 band EQ. The effects follow, including a stereo chorus that has a programmable sweep speed, along with a reverb. XP 100 combo The release of the XPR in 1989 was complemented by the release of the related XP100. The XP100 is a complete amplifier that packages the XPR pre-amplifier with a 2x50-Watt stereo amplifier and 6-inch speakers. The speakers are in a dual enclosure that can be separated. 1991 models 1991 brought a number of XP series products, that were all produced in small numbers. A low-noise update to the XPR was released, called the XPRa. Similarly, the XP100a combo was released as a low-noise version of the XP100. Another combo was released in 1991. Instead of 6-inch speakers like the XP100 and XP100a, 12-inch speakers were installed, in a 2x12 single-cabinet configuration. This product was called the XP212. A head version was also produced, called the Rockman Superhead. It is basically a XP100, without the speakers. Due to the small production numbers, the XPRa, XP100a, XP212 and Superhead