Audio Database

The

Pioneer SA-8800
58,500yen(around the 1975 time)

Description
@
The stereo Integrated Amplifier which raised cost performance, such as a control which adopted generous power and FET.

The power amplifier part consists of whole page hardwired-connection pure complimentary OCL circuitries of one step of first rank differential.
Furthermore, high-quality sound-ization, such as using as a stabilizing supply the transistor of the pair to which the property was equal, adoption of a large-sized radiator, and a pre driver or before, and banishing the transitional crossover distortion at the time of a minute output, is attained.
Moreover, adoption of }2 power source by an OCL circuitry, the bias compensation circuit which always stops the direct current component which leaks to an output by a temperature change, etc. are carried for the improvement in stability.

FET is adopted as the flat amplifier of a control part by the first rank. There is no transition of the noise by a volume location by this, and the noise is stopped in any volume locations.
While NFB is applied to the flat amplifier of a two more step hardwired connection also in direct current also in alternating current and making a distorted component into a relative minimum, sending of a low-impedance can be performed to the tone circuitry of the following stage, and the tone circuitry is used on more ideal requirements.
Moreover, noises, such as a switchpoint switching, are stopped because a control circuit also adopts }2 power source.

The 2 steps of turnover change is adopted as a tone circuitry, the span of a tone control is expanded, and a more ideal coordination is possible.

The three-step hardwired-connection type amplifier of }2 power source which uses a low-noise transistor for the first rank was adopted, the large gain of the first rank could be taken, a lot of stable NFB were applied, and the equalizer part has realized a low distortion and high SN.
Moreover, the shocks at the time of a switchpoint switching etc. are eliminated with }2 power-source scheme.

Two tape decks can be connected and tapes dubbing from 2 to 1 is made to tapeses 1-2 by turning ON a duplicate switchpoint.

The protection network which protects a speaker and the amplifier itself from a corruption is built in.
Furthermore, the it1 noise at the time of power-source on-off is also eliminated by parallel built-in relay two circuitries per •Ð channel.

The row / high filter, the loudness contour, and the muting circuit are carried.

Rear
Internal

Rating of a mode
Form Stereo Integrated Amplifier
<Power amplifier part>
Circuit system 1 step of differential whole page hardwired-connection pure complimentary OCL
Effective output (both channel drive, 20Hz - 20kHz) 45W+45W (4ohm)
40W+40W (8ohm)
THD (20Hz - 20kHz) 0.1% or less (at the time of an effective output)
0.05% or less (at the time of 20W output 8ohm)
0.05% or less (at the time of 1W output 8ohm)
Cross modulation distortion 0.1% or less (at the time of an effective output)
0.05% or less (at the time of 20W output 8ohm)
0.05% or less (at the time of 1W output 8ohm)
Output bandwidth (IHF, both channel drive) 5Hz - 30kHz (0.1% of distortion)
Frequency characteristic 10hz-80kHz+0 -1 dB
Input sensitivity/impedance Power amp in: 1V/50kohm
Output-terminal Speaker A-B: 4ohm-16ohm
Speaker A+B: 8ohm-16ohm
Headphone: 4ohms - 16ohms
Dumping factor (20Hz - 20kHz) 25 (8ohm) or more
S/N (IHF, A network, a short circuit) 100dB or more
<Preamplifier part>
Circuit system Equalizer amplifier: Positive/negative 2 power source, a three-step hardwired connection
Control amplifier: Positive/negative 2 power source, first rank FET
Input sensitivity/impedance Phono1, 2:2.5mV/50kohm
Tuner, Aux, Tape PB1, 2, DIN:150mV /, 50kohm
Phono maximum permissible input (0.1% of THD) 200mV(1kHz)
An Output voltage/impedance Tape Rec1, 2:150mV
2 (Din):30mV of Tape Rec / 80kohm
Pre out: 1V/1kohm
THD (20Hz - 20kHz) 0.05% or less
Frequency characteristic Phono(RIAA deflection): 30Hz-15kHz}0.3dB
Tuner, Aux, and Tape PB:10Hz-50kHz+0 -1 dB
Tone control
Bass: }7dB (100Hz) / }11dB (100Hz)
Turnover frequency: 200Hz/400Hz
Treble: }7dB (10kHz) / }11dB (10kHz)
Turnover frequency: 5kHz/2.5kHz
Filter Low: 30Hz, 6dB / oct
High: 8kHz, 6dB / oct
Loudness contour (Volume-40dB) +8.5dB(100Hz)
+4dB(10kHz)
Muting -20dB
S/N (IHF, A network, a short circuit) Phono: 70dB or more
Tuner, Aux, Tape PB: 90dB or more
<Synthesis>
The semiconductor used Transistor: 35 pieces
FET: Two pieces
Diode,others: 21 pieces
AC outlet Power-switch interlock: Two lines
Power-switch un-interlocking.: One line
Supply voltage AC100V, 50Hz/60Hz
Power consumption 100W (rate)
280W (maxima)
Dimensions Width 420x height 150x depth of 345mm
Weight 10.9kg