Vintage Digital
My Effects Rack

Boss Pro Series

The Boss Pro Series, launched in 1990, delivered studio-quality processing in compact half-rack units designed for professional use. Made in Japan, the range included the NS-50 Noise Suppressor, CL-50 Compressor Limiter, PQ-50 Parametric Equaliser, GE-21 Graphic Equaliser, EH-50 Stereo Enhancer, and the SE-50 and SE-70 multi-effects processors. Each model offered professional connectivity, clear metering, and optional 482.6 mm rack mounting via the RAD-50 adaptor. Combining clean signal paths with Boss’s renowned reliability, the Pro Series became a popular choice for musicians and engineers seeking compact, high-performance digital and analogue processing.

1990
Other Analogue Effects
/ Made In Japan

Boss NS-50 Stereo Noise Suppressor

The Boss NS-50 is a half-rack stereo noise suppressor using BOSS’s fast VCA-based downward expansion to remove noise without dulling highs, with flexible single-ended connections, visual gain-reduction metering and remote footswitch control, plus PRO Series power and level options.
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Boss NS-50
1990
Boss CL-50
Compressors & Limiters
Made In Japan /

Boss CL-50 Compressor Limiter

The Boss CL-50 is a half-rack VCA compressor/limiter with integrated gate, fast time constants, clear metering, side-chain and stereo link, and switchable −10 dBm/+4 dBm levels, designed for professional integration in a 482.6 mm rack via the RAD-50 adaptor.
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1990
Equalisers
/ Made In Japan

Boss PQ-50 Parametric Equaliser

The Boss PQ-50 is a half-rack 4-band parametric equaliser with per-band frequency, Q and level control, selectable peak or shelving on Low and High bands, overload indication, remote in/out switching and optional 482.6 mm rack mounting.
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Boss PQ-50
1990
Boss SE-50
Other Digital Effects
Made In Japan /

Boss SE-50 Stereo Effects Processor

The Boss SE-50 is a half-rack stereo multi-effects unit with 24-bit internal processing, 16-bit converters, 28 preset algorithms, space for 100 user patches, and deep MIDI and pedal control for studio or stage.
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1990
Equalisers
/ Made In Japan

Boss GE-21 Graphic Equaliser

The Boss GE-21 is a precise 21-band half-octave graphic equaliser with ±15 dB sliders, ±15 dB Total Level control, overload warning, and pro-grade low noise and distortion.
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Boss GE-21
1991
Boss SE-50
Other Analogue Effects
Made In Japan /

Boss EH-50 Stereo Enhancer

The Boss EH-50 is a half-rack stereo enhancer with five modes, level-dependent expansion options, clear metering and pedal-switchable bypass, designed for studio and live integration with optional 482.6 mm rack mounting.
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1993
Other Digital Effects
/ Made In Japan

Boss SE-70 Super Effects Processor

The Boss SE-70 Super Effects Processor, introduced in 1993, delivered 35 effects and 45 algorithms in a compact rackmountable unit. With vintage effects, real-time control, MIDI integration, and studio-quality sound, it became a versatile and highly respected processor for guitarists, bassists, keyboardists, and producers.
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Boss SE-70