The Technics SU-9070 (also known as the Stereo Flat Preamplifier) is a highly regarded, vintage audiophile preamplifier manufactured in Japan during the late 1970s. Part of Technics’ elite Professional Series, it was designed with a “less is more” philosophy, omitting standard bass and treble tone controls in favor of an ultra-clean, low-distortion “flat” signal path.
Key Specifications & Features
Ultra-Low Distortion: Features a Total Harmonic Distortion (THD) of just 0.003%, offering incredible signal purity.
Advanced Phono Stage: Highly prized by vinyl enthusiasts, it supports up to three turntables simultaneously (2x Moving Magnet (MM) and 1x Moving Coil (MC)).
Signal-to-Noise Ratio: Features robust separation and high-fidelity output with a 106 dB ratio for Aux inputs.
Streamlined Control: Offers a subsonic filter (20 Hz, -12 dB/oct), a -20 dB muting switch, and an input selector, completely bypassing traditional tone equalization.
