The RA-810
is propably one of the most versatile, most professional stereo pre-main
amplifiers ever developed. Possessing an
abundant 180 watts music power, the specially designed split power supply
drivers almost any quality speakers stably and smoothly. The direct coupling
circuitry incorporated ensures an excellent frequency response and negligible
IM distortion. The transistors used are all long-life, low-noise silicon types
that give the RA-810 its superb S/N and extended dynamic range. Note that a
wide 5 to 50,000 Hz power bandwidth and THD of 0,3% or less are also achieved
by this highly advanced equipment. Naturally the controls and the connection
facilities are just as awesome. Most of all, see the RA-810 in actual, and find
out its personality yourself.
Special
Features
All
long-life, low-noise Silicon Transistors.
Direct
Coupling Circuity.
Split Power
Supply.
Specially
designed protection circuits to prevent damages to your speakers and to the
amplifier.
Separable
Pre-Amp and Main-Amp sections for many versatile uses.
3-stages
Direct Coupled pre-amplifier.
Usage of 2
pairs of speaker systems, one pair at a time or simultaneously at the same
time.
Facility for
two tape recorders, with monitoring and dubbing features.
Facility for
two record players, with switcheable input sensitivities and impedances for one
of them to match characteristics of your cartridge.
Facilities
for a stereo tuner, two auxiliary inputs for such as another tape recorder and
8-track tape player.
Facility for
two Tape DIN Jacks.
Facility for
3 AC Outlets.
Long-stroke
Slide Tone Controls, convenient for precise and effective tone adjustments.
Volume
Control, Selector Control, Mode Control, Monitor control, Speaker Selection
Control and Balance Slide Control.
"Push-Push"
type switches for Muting, Loudness, High and Low Filters, Tone and Power.
A Power
Indicator Lamp for easy visual indication.
A front
panel Headphone Jack.
Specifications
Power
Amplifier Section
Total Music
Power (IHF):
180
watts at 4 Ω;
125
watts at 8 Ω
Continuous
Power (RMS, both channel driven, THD less than 0,5%):
60
watts/channel at 4 Ω;
40
watts/channel at 8 Ω
Harmonic
Distortion: less than 0,3% (20 -20,000 Hz at 40 W/ch)
Intermodulation
Distortion: 0,1% at 40 W/ch
Frequency
Response: 4 to 75,000 Hz; +0 -3 dB
Power
Bandwidth (IHF): 5 to 50,000 Hz at 8 Ω
Input
Sensitivity/Impedance: 1 V/30 k Ω
Damping
Factor: 35 at 8 Ω
Speaker
Impedance: 4 to 16 Ω
Pre-Amplifier
Section
Output
Voltage: 1 V (rated), 3 V (maximum)
Harmonic
Distortion: less than 0,1% at rated
output voltage
Frequency
Response: 3 to 50,000 Hz, +0 -3 dB
Hum and
Noise:
Phono 1 and
2 : 65 dB
Tuner, Tape
In : 75 dB
Aux 1 and 2
: 75 dB
Residual
Noise: 1,5 mV
Input
Sensitivity/Impedance:
Phono
1 : 2 mV/ 100 k Ω
Phono
2 : 2, 4, 8 mV/30 k, 50 k, 100 k Ω
Tuner,
Tape In : 200 mV/45 Ω
Aux 1
and 2 : 200 mV/45 Ω
Tape
DIN : 330 mV/100 k Ω
Phono
Equalizer: EEF type, RIAA ±0,5 dB, 50 to
15,000 Hz
Phono
Overload: 125 mV
Loudness
Switch: +10 dB at 50 Hz; +6 dB at 10,000 Hz
High
Filter: -10 dB at 10 kHz
Low
Filter: -10 dB at 50 Hz
Muting
Switch: -20 dB at 1 kHz
Bass
Control: ±10 dB at 50 Hz
Treble
Control: ±10 dB at 10,000 Hz
Crosstalk: 43 dB at 1khz
Square Wave
Risetime: 5 microseconds
General
Power
Requirements: 100, 117, 220, 240 V 50/60
Hz
Power
Consumption: 150 watts max.
Dimensions
(W x H x D): 420 x 140 x 304 mm (16½" x 5½" x
12")
Weight: 10 kg (22 lbs)
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