Technics SA-4500
¥ 58,000 (around 1973)
Commentary
This is the first FM/AM stereo receiver in this class that uses a fully connected differential amplifier OCL circuit in the audio section.
Low-noise PNP silicon transistors are used for all stages of the preamplifier.
A low-noise FET is used for the FM tuner section.
Electronic transistor protection circuit is adopted.
There are two sets of speaker jacks, Main and Remote.
NF type tone control is adopted.
.JPG)
Model Rating
| Type | FM/AM stereo receiver |
| Amplifier Unit | |
| Music Power (IHF) | 55W (4 Ω) 40W (8 Ω) |
| Effective power (IHF) | 12W/12W (8 Ω) |
| Power band wiz | 20 Hz to 50 kHz, -3dB |
| Frequency characteristic | AUX : 30 Hz to 50 kHz ± 3 dB |
| Total harmonic distortion factor | 0.8% or Less (Rated Output) |
| Intermodulation distortion factor (60 Hz : 7 kHz = 4 : 1 at effective output) | Not more than 1.2% |
| Damping factor | 40 (at 8 Ω Load) |
| Input Sensitivity / Impedance | Phono (Low) : 3.5mv/50k Ω Phono (High) : 10mV/50k Ω Ceramic : 30mV/33k Ω AUX : 170mV/35k Ω |
| Tape monitor | Rec Out:170mV Playback : 170mV/35k Ω |
| Tone control | Bass : 50 Hz, ± 10 dB Treble : 10 kHz, ± 9 dB |
| High filter | 6 kHz, -6dB/oct. |
| Loudness control | 100 Hz, + 5 dB 10 kHz, + 3 dB |
| <FM Part> | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity (IHF) | 2.8 μ V |
| Selectivity (IHF) | 40dB |
| Signal-to-noise ratio (IHF) | 55dB |
| Capture ratio | 3dB |
| Image interference ratio | 55dB(84MHz) |
| IF interference ratio | 70dB |
| Spurious interference ratio | 70dB(84MHz) |
| AM suppression ratio | 38dB |
| Stereo separation | 35dB |
| Total harmonic distortion factor | Not more than 0.7% |
| <General> | |
| Semiconductor used | FET : 1 Transistor : 40 Diode : 38 pcs |
| Pwer | 100 VAC, 50/60Hz |
| Power consumption | 60W |
| External dimensions | Width 417x Height 147x Depth 340 mm |
| Weight | 9kg |