🏷️ Basic Information Identification Make: Marantz Model: 2270 Year: Unknown Generation: Unknown 📋 Manual Details General Manual Type: Service Manual Language: English Format: PDF Availability: Downloadable 📄 Audio Specs Performance Output Power Rms Per Channel: 70 Watts per channel into 8 ohms Total Harmonic Distortion Thd: 0.1% Frequency Response: 20Hz - 20kHz Damping Factor: 45 Inputs Phono Sensitivity: 1.8mV Aux Sensitivity: 180mV Microphone Sensitivity: 0.5mV Tuning Tuning Range Fm: 88-108 MHz Tuning Range Am: 530-1600 kHz If Frequency Fm: 10.7 MHz If Frequency Am: 455 kHz Features Mode Selector: Stereo, Mono Tone Controls: Bass, Treble, Midrange Filters: Low Filter, High Filter Tape Monitor: Yes (2 decks) Noise Filter: Yes Power Supply Power Requirements: 100-120V or 200-240V AC, 50/60Hz Power Consumption: 180W 📄 Internal Components Transistors Estimated Transistor Count: Approx. 30-40 Vacuum Tubes Vacuum Tube Count: 0 Circuitry Stereo Decoder: Dolby FM