Rockman Vintage SR&D Sustainor 100A + Stereo Chorus/Delay 100A Rack Pair - Vintage 1985-1987 - Blue Face/Black Casing - 2units/1U Rack

Vintage 1985-1987 SR&D Rockman Sustainor 100A + Stereo Chorus/Delay 100A Rack Pair Reverb Condition: Good Vintage matched SR&D Rockman rack pair consisting of a Rockman Sustainor Model 100A and Rockman Stereo Chorus/Delay Model 100A. Both units were connected to a guitar and amplifier and tested. All tested functions operated properly. These are original blue-face Scholz Research & Development Rockmodules from the classic Rockman era, made in Waltham, Massachusetts. Included in this listing: - Rockman Sustainor Model 100A - Rockman Stereo Chorus/Delay Model 100A - Both original-style hardwired AC power cords - Rack ears as photographed ROCKMAN SUSTAINOR Model: Sustainor 100A Serial Number: SP11398 Manufacturer: Scholz Research & Development, Inc. Location: Waltham, Massachusetts, USA Era: 1987 production The Sustainor serial and Model 100A configuration place this example in the 1987 blue-face production period. The rear factory label is date-stamped “MAY 19”; the year portion of the physical stamp is obscured. The serial number and known Sustainor production sequence support 1987 production. The Sustainor was designed as a comprehensive guitar preamp / signal-processing system incorporating compression, gating, distortion, clean and semi-clean voicings, tone shaping, output control, and an external effects loop. Front-panel functions include: - Guitar input - Preamp gain - Compression - Sustain Longer control - Gate trigger control - Hi Cut - Overdrive threshold - Gain Boost - Auto Clean - Semi Clean - Dist / Edge / Clean operating modes - Frequency control - Phase Notcher - Treble Boost - Rhythm Volume - Dual output level controls - Bypass - Power Rear-panel connections include: - Bypass - Volume - Channel - Dist / Edge Return - All Return - Send - Output The rear panel notes that the loop is located after the compressor and gate and before the distortion section. ROCKMAN STEREO CHORUS/DELAY Model: Stereo Chorus/Delay 100A Serial Number: CD02016 Manufacturer: Scholz Research & Development, Inc. Location: Waltham, Massachusetts, USA Era: original mid-1980s blue-face production The Stereo Chorus/Delay was produced during the original SR&D Rockman rack era. Serial CD02016 is an early-production example consistent with the 1986-era introduction of the unit. The ©1985 SR&D marking visible on the front panel is a copyright/design marking and is not being represented as the exact manufacture date. The Stereo Chorus/Delay combines stereo chorus, doubling, delay, and stereo output-mixing functions in a single Rockmodule. Front-panel functions include: - Guitar / line input level selection - Drive level - Headroom indicators - Chorus sweep-speed control - Chorus On - Long Chorus / Normal mode selection - Mode Select - Delay On - Feedback control - Delay Time - Long / Short delay selection - Output Mix - Wide / Normal / Equal / Subtractive mix options - Stereo / Mono output configuration - Bypass - Power Rear-panel connections include: - Bypass - Mix A/B - Chorus/Delay footswitch - Wide Mix - Processed output - Direct output - Input The Stereo Chorus/Delay was designed as a true stereo spatial processor and is a period-correct companion to the Rockman Sustainor. MATCHED ROCKMAN SYSTEM The Sustainor and Stereo Chorus/Delay were designed to complement one another within the Rockman rack system. Together, the pair provides: - Guitar preamplification - Compression - Noise gating - Clean and distorted voicings - EQ / filtering - Stereo chorus - Doubling - Analog-style delay - Stereo output processing This Sustainor + Stereo Chorus/Delay combination represents a substantial portion of the classic SR&D Rockman rack signal chain associated with the highly processed guitar tones of the 1980s. FUNCTIONAL STATUS Both units were connected to a guitar and amplifier and tested. All tested functions operated properly. The following were verified through practical guitar/amp testing: - Both units power on - Signal passes correctly - Sustainor preamp functions - Sustainor gain / distortion functions - Sustainor clean / semi-clean functions - Sustainor compression / sustain response - Sustainor gate operation - Sustainor tone / filtering controls - Sustainor output controls - Stereo Chorus/Delay signal path - Chorus operation - Delay operation - Feedback and delay-time controls - Output-mix functions - Front-panel controls and switches No functional fault was identified during testing. COSMETIC CONDITION Reverb Condition: Good Both units are fully functional but show visible cosmetic wear consistent with vintage rack equipment. Observed wear includes: - Scratches and scuffs across the top and bottom chassis panels - Rack-use and handling marks - Finish wear along chassis edges - Minor oxidation / tarnish around some rear jack hardware and screws - General surface wear and age-related marks The blue front-panel…