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Sansui RA-700 Reverberation Amplifier

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Page last updated Apr 01, 2026

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Description

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Step back in time and elevate your audio experience with the Sansui RA-700 Reverberation Amplifier, a standout piece in the world of effects processors. Designed for those who appreciate the warmth and texture of analog sound, this vintage gem is perfect for musicians and studio engineers looking to add depth and rich ambience to their recordings. With its classic wood paneling and intuitive interface, the RA-700 not only provides exceptional sound quality but also adds a touch of retro charm to any studio setup.

The RA-700 offers a straightforward approach to sound manipulation, boasting an all-analog signal path that ensures your audio retains its natural character. This unit is versatile, allowing for seamless integration into existing setups, making it a favorite among those who value both form and function. Whether you’re looking to add subtle echoes or dramatic reverbs, the RA-700 delivers with remarkable clarity and precision.

Key Features:

Classic analog reverberation amplifier design
All-analog signal path for natural sound retention
Intuitive interface with easy-to-use controls
Seamless integration into existing studio setups
Vintage wood paneling for added aesthetic appeal
Ideal for adding depth and ambience to recordings

Videos

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Throwback Chevy

Sansui RA 700 Vintage Reverb - Throwback Chevy

Throwback Chevy

SANSUI RA-700 REVERBERATION AMPLIFIER

Ricardo Vieira

Sansui RA-700 Reverberation / reverb unit hifi component demo with Whitney

D-Widdy

Sansui RA-700 Reverberation Amplifier

Retrodiggs

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Sansui RA-700 Reverberation Amplifier.

Features and functionality

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The RA-700 is favored for its colorful display, often used as a visual complement to audio setups.
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Fluttering noise increases in intensity with higher reverb settings; not typical for this model based on video comparisons.
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The RA-700 can add static noise when increasing reverb, possibly indicating a need for internal restoration or repair.
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Use cases and applications

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Owners enjoy adding reverb effects to classical and early 60s blues rock, enhancing tracks by Procol Harum and Cream.
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Tapping the spring tank results in the expected spring sound, confirming some functional aspects of the reverb tank.
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The RA-700 is often considered for its visual appeal and console bling, making it a popular choice for those looking to add aesthetic value to setups.
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Setup and maintenance

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The RA-700 uses a spring reverb system, which can be challenging during repairs, especially concerning high voltage in the scope power supply.
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Some owners use the RA-700 as a switch box due to its capability to integrate multiple analog components into a single audio system.
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A common issue is fluttering noise at higher reverb settings, potentially caused by bulging capacitors or oscillation within the circuit.
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Capacitors, especially large blue ones, may need replacement if they appear bulged, as they could be close to failing.
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Replacing electrolytic capacitors and transistors may not resolve fluttering issues, indicating deeper circuit problems.
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Some users anticipate needing to open and restore the RA-700, suggesting it may require attention to maintain optimal performance.
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Comparisons

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While the RA-500 is also popular, users are drawn to the RA-700 for its more vibrant visual display.
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User experience

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Owners note the RA-700 gives extra depth to some songs despite needing maintenance, highlighting its potential for enhancing audio experiences.
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