Hitachi Receiver Model SMR-7240
Hitachi SMR-7240 is a
vintage 4/2-channel quadraphonic AM/FM stereo receiver introduced in the mid-1970s. It was designed during the peak of the quadraphonic audio era to handle both discrete 4-channel audio formats and standard 2-channel stereo setups.
Key Technical Specifications
- Power Output: 10 watts RMS per channel into 8 ohms (20–20,000 Hz) with all four channels driven, at 1% Total Harmonic Distortion (THD).
- FM Tuner Sensitivity: 2.2 µV (IHF).
- Capture Ratio: 1.2 dB.
- Stereo Separation: 36 dB at 1 kHz.
- Signal-to-Noise Ratio: 64 dB
Core Audio Features
- Built-in Matrix Decoders: Includes dedicated circuitry to decode quadraphonic formats, heavily focusing on the Hitachi CD-4 Quad sound system and matrixed formats.
- Twin Tuning Meters: Features dual physical meters for signal strength and fine-tuning alignment, a visual premium typically reserved for higher-priced decks at the time.
- Tape Dubbing Capabilities: Equipped with two independent tape deck inputs, allowing users to monitor a radio broadcast while simultaneously dubbing or recording tapes.
Excellent Condition