Amplifier & Audio SpecificationsPower Output: 45 watts per channel into 8Ω (stereo) Frequency Response: 10Hz to 40kHz Total Harmonic Distortion (THD): 0.04% at rated power (drops to 0.025% at half power) Damping Factor: 32 Speaker Impedance: 4Ω to 16Ω Inputs & SensitivityPhono Input (MM): 2.5mV / 78dB Signal-to-Noise RatioLine Inputs (Aux/Tape): 150mV / 95dB Signal-to-Noise RatioDIN Input: 180mVTuner SectionTuning Bands: FM and MW (AM)FM Tuning Range: 88 to 108 MHzTuning Indicators: Two analog VU meters (one for signal strength, one for FM center-tuning) Physical & General DetailsDimensions: 430 mm × 142 mm × 300 mm (Width × Height × Depth)Weight: 8.2 kg (approx. 18-19 lbs) Power Consumption: 450 W Color Variations: Silver (SA-400) and Brown (SA-400K) Front Panel Features & ControlsTone Adjustment: Independent click-less knobs for Bass and Treble.Filters & Switches: Built-in low filter (to eliminate record-player motor rumble), loudness switch, and an FM muting mode.Speaker Selection: Push-button matrix supporting "Main" and "Remote" stereo pairs.Headphone Jack: Dedicated front-panel 1/4" output.