Audio Database

The

ROTEL RX-450
44,500yen(around the 1970 in-the-early time)

Description
 
The stereo receiver which introduced the technology of ROTEL and attained highly efficient-ization.

The tuner part has 5 steps of IF composition, and has adopted FET and the ceramics filter.

The audio part has adopted the output circuit of the all silicon transistor SEPP.

A preamplifier part and a main-amplifier part can be separated and used.


Rating of a mode
Form FM / AM-stereo receiver
<Audio part>
Music power (IHF) 80W (4ohm)
60W (8ohm)
Effective output 20W/20W (8ohm)
THD (1kHz) 0.3% (at the time of 15W output)
0.2% (at the time of 1W output)
Cross modulation distortion (70Hz:7kHz=4:1) 0.3% (at the time of 15W output)
0.2% (at the time of 1W output)
Frequency characteristic (at the time of 1W output) 15Hz-50kHz+0 -1.5 dB
Output band property 25Hz - 30kHz
Dumping factor 30 (8ohm)
Aux rise time 2.5 microseconds (10kHz)
Phono overload 70mV(1kHz)
Phono equalizer 50Hz -13.5dB
S/N ratio Phono: 60dB or more
Aux: 70dB or more
Remains noise 1mV or less
Input sensitivity/impedance MAG: 3mV / 50kohm
Aux: 200mV / 100kohm
Tin: 400mV / 15kohm
Tone control Bass: ±13dB (50Hz)
Trebel: ±13dB (10kHz)
Loudness control 50Hz
Speaker impedance 4ohm-16ohm
<FM tuner part>
Received frequency 76MHz - 90MHz
Antenna impedance A 300ohm equilibrium / 75ohm unbalance
Sensitivity (IHF) 2.0 microvolts
THD (400Hz, 100% modulation) mono:0.5%
stereo:1%
S/N ratio 65dB or more
Image stonewalling ratio 50dB or more
Spurious response 80dB
Intermediate-frequency-jamming ratio 80dB
Capture ratio 3dB
Selectivity (IHF) 45dB
Subcarrier supression ratio 40dB
Stereo mono-auto level 50 microvolts
Demphasis 50 microseconds
<AM tuner part>
Received frequency 535kHz - 1605kHz
Practical speed 25 microvolts (S/N=20dB)
Image ratio (1MHz) 60dB
Intermediate-frequency-jamming ratio (1MHz) 50dB
S/N ratio 50dB
<Synthesis>
The semiconductor used Transistor: 40 pieces
FET: One piece
Diode: 21 pieces
Supply voltage AC100V, 50Hz/60Hz
Power consumption 140VA
Dimensions Width 435x height 130x depth of 320mm
Weight 7kg