Pioneer SR-303 Stereo Reverberation Amplifier 1980 BBD Delay and Chorus

Such a cool looking piece of equipment. It was intended to add reverb or chorus to a stereo system and does that well, but can also be used for instruments, recordings and so on. Has an amazing display that lights up in waves as it receives signal. It is from the early 80s and uses a bucket brigade delay style. Sounds awesome, looks really cool, and is built incredibly well. The feet have been removed from this unit. This does not affect functionality.

Note: when the reverb time knob is pulled out, delay times are shortened and the effect becomes more of a chorus—so it’s kind of a dual effect.

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The Pioneer SR-303 is an all electronic reverberation amplifier which incorporates an audio-use delay element known as a bucket brigade device (BBD).

Unlike conventional mechanical reverberation amplifiers this particular unit is not in the least affected by external vibration or fluctuations in the reverberation effect.

Furthermore, the delay element features a C Mos IC semiconductor which contributes greatly to yielding such impressive characteristics as a high signal to noise ratio of 90dB and a low total harmonic distortion.

Specifications:

• Input sensitivity: 150mV
• Frequency response: 5Hz to 70kHz
• Total harmonic distortion: less than 0.05%
• Signal to noise ratio: 90dB
• Reverberation time: 0-3s (effect 1), 25-100m/s (effect 2)
• Output level: 150mV
• Semiconductors: 8 x IC, 1 x FET, 14 x transistors, 16 x diodes
• Dimensions: 420 x 99 x 336mm
• Weight: 4.3kg