Pioneer SA-8500 II Integrated Amplifier

Designed for Power to Spare
Advanced DC stability and high gain are realised in the power amplifier by incorporating a dual plus-minus power supply, a 1st stage differential amplifier and a current mirror type differential amplifier in the pre-driver stage. Negative feedback is applied in an optimum design for minimised distortion. New type power transistors in the output stage form a parallel push-pull composition in a purely complementary OCL circuit.
Continuous power output is 60 watts per channel min. RMS, at 8 ohms or 75 watts per channel at 4 ohms from 20 Hertz to 20,000 Hertz with no more than 0.1% total harmonic distortion.
Ample reserve power becomes available with low distortion. Chimney type heatsinks are also employed which focus the generated heat to increase thermal dissipating efficiency.

High Stability Twin Transformer Power Supply
Superb regulation and stability are achieved by the massive twin power transformer design that in essence combines two monaural amplifiers to form symmetrical left and right channel amplifiers. The dual plus-minus power supply system also incorporates four large 10,000 microfarad electrolytic capacitors, providing greater stamina in this important section. Low frequency reproduction becomes clear and distinct. The preamplifier section also includes a carefully engineered voltage regulator circuit and balanced positive and negative power supply, assuring low distortion from low to high output levels.

Class A SEPP Equaliser Section
Low noise PNP transistor differential amplifier 1st stage and class A purely complementary SEPP final stage are featured in the three stage direct coupled equalizer circuit. At ± 25 V power supply voltage, the maximum phono input (at 1 kHz) is more than 250 mVrms providing plenty of dynamic margin. Stringent standards for the high precision circuit elements contribute to holding the RIAA deviation to within ± 0.2 dB in the range from 20 Hz to 20 kHz. The extremely flat response enables accurate reproduction of delicate program source material.

Protection/Muting Circuit for both Reliability and Listening Ease
Valuable speaker systems and semiconductors are protected against damage in event of speaker terminal shorting or the appearance of DC current at the output terminals. If these types of malfunctions occur, the relay type protection circuit immediately opens the output circuit, thus preventing further damage. The circuit also performs a muting function to prevent noise bursts when the power switch is operated on-off.

PHONO Input Circuit with Selectable Load Capacitance
An input capacitance switch allows optimum matching of the phono 1 and 2 circuits to the cartridge output characteristics. Various types of responses can also be obtained from a single cartridge by varying the input capacitance with the input capacitance switch to provide differences in playback sound quality.

Selectable Turnover Tone Controls
In addition to the familiar bass and treble controls, turn over switches are provided which can be used to select the point where the tone controls take effect. Precise tone adjustments become possible according to listening room acoustics, phono cartridge and speaker system frequency characteristics and other objectives. Since a tone defeat switch is also included, a flat frequency response can be obtained when desired to allow listening comparisons of various tone control settings.

Convenient DUPLICATE Switch for Tape Dubbing
Two tape decks can be connected and dubbing performed in either direction (from tape 1 to tape 2, or from tape 2 to tape 1 ). Simple switch selection permits extremely convenient tape duplication and program editing.
Continuous power output of 60 watts* per channel, min. RMS, at 8 ohms or 75 watts* per channel at 4 ohms from 20 Hertz to 20,000 Hertz with no more than 0.1%total harmonic distortion.

Power Output: 60 W into 8 Ω; 75 W into 4 Ω
Power Amplifier Section
Circuitry: 2-stage differential amplifier Parallel PP direct-coupled OCL
Total Harmonic Distortion: at 20 Hz to 20 kHz
Continuous rated power output: 0.05%
30 watts per channel power output, 8 Ω: 0.01%
1 watt per channel power output, 8 Ω: 0.01%
Intermodulation Distortion:
Continuous rated power output: 0.05%
30 watts per channel power output, 8 Ω: 0.01%
1 watt per channel power output, 8 Ω: 0.01%
Frequency Response: 5 Hz to 100 kHz 0/- 1 dB
Input (Sensitivity/Impedance)
Power Amp In: 1 V/50 kΩ
Damping Factor (20 Hz to 20 kHz, 8 Ω): 30
Hum and Noise (IHF, short-circuited, A network): 110 dB
Preamplifier Section
Circuitry
Equaliser amplifier: 1st stage differential amplifier 3-stage direct-coupled A class SEPP
Control amplifier: 1st stage differential amplifier 2-stage direct-coupled, NFB type
Input (Sensitivity/Impedance)
Phono 1 & 2: 2.5 mV/50 kΩ
Cartridge Load: 100, 200, 300, 400 pF
Tuner, Aux, Tape Play 1/2: 150 mV/50 kΩ
Phono Overload Level (T.H.D. : 0.05%):
Phono 1 & 2: 250 mV (1 kHz)
Output (Level/Impedance)
Tape Rec 1 & 2: 150 mV
Tape Rec 2 (DIN connector): 30 mV/80 kΩ
Pre Out: 1 V/2 kΩ, 6 V/2 kΩ (Max.)
Total Harmonic Distortion: 0.02% (20 Hz to 20 kHz)
Frequency Response
Phono (RIAA Equalization): 20 Hz to 20 kHz, ± 0.2 dB
Tuner, Aux, Tape Play: 5 Hz to 50 kHz, 0/- 1 dB
Tone Control
Bass: ± 10 dB (25 Hz/50 Hz/100 Hz)
Turn Over Frequency: 100 Hz/200 Hz/400 Hz
Treble: ± 10 dB (8 kHz/16 kHz/32 kHz)
Turn Over Frequency: 2 kHz/4 kHz/8 kHz
Filter
Low: 15 Hz (6 dB/oct.)
High: 8 kHz (6 dB/oct.)
Loudness Contour: + 6 dB (100 Hz); + 3 dB (10 kHz)
(Volume control set at - 40 dB position)
Hum and Noise: 75 dB (Phono); 95 dB (Tuner, Aux, Tape Play)
(IHF, short-circuited, A network)
Muting: 0, - 20 dB
Power Requirements: AC 220 V, 240 V 50/60Hz
Power Consumption: 490 W Max
Dimensions: 420 (W) x 376 (D) x 150 (H) mm
Weight: 13.9 kg

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

Shipping Rates

We calculate your shipping rate based on the total weight of your items and your delivery address. Standard shipping to the UK Mainland (excludes Northern Ireland, Isle of Man, Channel Islands) is free, except where specifically indicated. Don't worry, you'll always see the final shipping charge displayed before you reach the payment step (on the checkout page).

Carriers

We despatch the bulk of our UK mainland items on a 24 hour service.  Non-Mainland locations – Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as UPS and occasionally by a Pallet service.

Order Tracking

If a tracking # is provided by the carrier, we will update your order with the tracking information. Please note that some orders will not have tracking numbers.