Audio Database

The

ROTEL RA-1210
73,000yen(around the 1970 in-the-early time)

Description
 
The Integrated Amplifier which adopted as the main-amplifier part 2 power-source schemes (the transformer, capacitor which became independent to the right-and-left channel) of the perfect discrete type.

The whole page hardwired-connection OCL semi- complimentary which uses one step of differential amplification for a main-amplifier circuitry is adopted.
Since there is also no output capacitor, the high output of little stability distorted from low-pass to a high region is obtained.

The three-step hardwired-connection E-E feedback of only a PNP type transistor is adopted.

A speaker will be damaged, if a pop noise comes out and the noise of pulse nature enters, since supply voltage is not a steady state from the power activation time for 5 to 6 seconds.
In order to cope with this, there is a delay circuit, and also a fuse is respectively put into a power circuit, and the circuit breaker is put into the speaker circuitry.
If it carries out for a while even if it operates at the time of an overload, since a circuit breaker is an auto return, it will return.


Rating of a mode
Form Solid-state stereo amplifier
<Main-amplifier part>
Music power (IHF) 4ohm: 230W
8ohm: 160W
Effective output (RMS) 4ohm: 80W+80W
8ohm: 60W+60W
THD Output power: 0.5%
55W output: 0.1% (20Hz - 20000Hz)
Cross modulation distortion 55W output: 0.1%
Frequency characteristic 3Hz - 100,000Hz, and +0 -3 dB
Output band property 5Hz - 50,000Hz
Dumping factor 35 (8ohm)
Input sensitivity/impedance 1V/30kohm
Speaker impedance 4ohm-16ohm
<Preamplifier part>
Output voltage 1V-3V
THD 0.1%
Frequency characteristic 3Hz - 50,000Hz, and +0 -3 dB
S/N ratio Phono1, 2:70dB
AUX1, 2, Tape In: 80dB
Remains noise 0.5mV
Input sensitivity/impedance Phono1:1mV/100kohm
Phono2:1, 2, 4mV/30, 50, 100kohm
Tuner, AUX1, 2, Tape In:180mV /, 45kohm
Tape DIN: 330mV / 100kohm
Equalizer Deflection of less than ±0.5dB from a RIAA standard curve
Loudness 50Hz:+6dB
10kHz:+2dB
A high filter 10kHz:-10dB
A low filter 50Hz:-10dB
Muting 10kHz:-20dB
Bass 50Hz : ±10dB
Treble 10kHz : ±10dB
<Synthesis>
Supply voltage 100V, 117V, 220V, 240V, 50Hz/60Hz
Power consumption 150W
Dimensions Width 420x height 140x depth of 304mm
Weight 13.7kg