ROTEL RX-450
¥ 44,500 (around the early 1970 s)
Commentary
A high-performance stereo receiver using Rotel technology.
The tuner section is composed of 5 IF stages and uses FET and ceramic filter.
The audio section uses an all-silicon transistor SEPP output circuit.
The preamp section and main amplifier section can be separated for use.
Model Rating
| Type | FM/AM stereo receiver |
| <Audio section> | |
| Music Power (IHF) | 80W (4 Ω) 60W (8 Ω) |
| Effective power | 20W/20W (8 Ω) |
| Harmonic distortion factor (1 kHz) | 0.3% (at 15W output) 0.2% (at 1W output) |
| Intermodulation distortion factor (70 hz : 7 khz = 4 : 1) | 0.3% (at 15W output) 0.2% (at 1W output) |
| Frequency response (at 1W output) | 15 Hz ~ 50 kHz + 0 -1.5 dB |
| Output band characteristic | 25 Hz to 30 kHz |
| Damping factor | 30 (8 Ω) |
| Aux Rise Time | 2.5 μ s (10 kHz) |
| Phono Overload | 70mV(1kHz) |
| Phono Equalizer | 50Hz -13.5dB |
| Signal-to-noise ratio | Phono : 60 dB or more Aux : 70 dB or more |
| Residual noise | 1 mV or less |
| Input Sensitivity / Impedance | MAG : 3mV/50k Ω Aux : 200mV/100k Ω Tin : 400mV/15k Ω |
| Tone control | Bass : ± 13 dB (50 Hz) Trebel : ± 13 dB (10 kHz) |
| Loudness control | 50Hz |
| Speaker impedance | 4 Ω ~ 16 Ω |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Antenna impedance | 300 Ω balanced / 75 Ω unbalanced |
| Sensitivity (IHF) | 2.0 μ V |
| Harmonic distortion factor (400 Hz, 100% modulation) | mono:0.5% stereo:1% |
| Signal-to-noise ratio | 65 dB or more |
| Image interference ratio | 50 dB or more |
| Spurious response | 80dB |
| Intermediate frequency interference ratio | 80dB |
| Capture ratio | 3dB |
| Selectivity (IHF) | 45dB |
| Subcarrier suppression ratio | 40dB |
| Stereo - Mono Auto Level | 50 μ V |
| De-emphasis | 50 μ s |
| <AM Tuner Section> | |
| Receiving frequency | 535 kHz to 1605 kHz |
| Practical sensitivity | 25 μ V (S/N = 20 db) |
| Image Ratio (1 mhz) | 60dB |
| Intermediate frequency interference ratio (1 MHz) | 50dB |
| Signal-to-noise ratio | 50dB |
| <General> | |
| Semiconductor used | Transistor : 40 FET : 1 Diode : 21 |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 140VA |
| External dimensions | Width 435x Height 130x Depth 320 mm |
| Weight | 7kg |