Aurex Preamp PREAMPLIFIER MODEL SY-330 Type: Control Amplifier RIAA Deviation: 30Hz～15kHz ±0.5dB S/N Ratio (IHF): Phono: 70dB, Aux: 90dB Input Sensitivity/Impedance: Phono MM: 2.5mV/47kΩ, Aux: - Phono Maximum Allowable Input: 150mV (RMS, 1kHz) Dimensions: Width 450 x Height 93 x Depth 245mm Weight: 2.7kg Sound output confirmed from TUNER and AUX. BASS, TREBLE, MODE, LOUDNESS, VOLUME, and BALANCE adjustments confirmed. Slight scratchy noise present. TAPE MODE, PHONO, and MIC MIXING untested. Due to its antique nature, some scratchiness may be present. The sound quality has an antique acoustic character, which may be a matter of preference. I find it appealing. The body shows discoloration and scratches due to aging.