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Vintage Pioneer SA-6800 MKII Stereo Amplifier

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Vintage Pioneer SA-6800 MKII Stereo Amplifier

Post by HiFiLab on Fri Dec 22, 2017 10:25 pm

Made In Japan

日本原裝古董級Pioneer SA-6800II

High-Performance Phono Equalizer: RIAA Equalization ±0,3 dB

When you play improved phonograph records your amplifier must be able to handle a high input level or suffer a degree of unpleasant distortion. The SA-6800 II employs a high input voltage-resistant IC in the phono equalizer section in order to avoid distortion. Its split power supply system (plus 21V, minus 19 V) steps up the very large margin of Phono input level to 200 mV (1khz, T.H.D. 0,1%) at input sensitivity of 2,5 mV. The result of this solid-stste sophistication is unquestionably dependable performance. You hear all the dynamics and nuances of the most highly engineered records with the least possible distortion. Deviation from the RIAA equalization curve is only ±0,3 dB

Low-Distortion Power Amplifier - Bass Fequencies Sweet and Clean

The many refinements in the SA-6800 II include a constant-current load construction in the pre-driver stage of the power amplifier. This helps eliminate a time constant at low frequency so that sound quality remains unmuddied and sweet over the whole audible spectrum. The constant-current load, by activating negative feedback, assures that distortion is held to a minimum.

The power transistors thus operate well within their linear limitations for richer sound. Power output is continuous 45 watts per channel, min. RMS at 8 ohms from 20 Hz to 20,000 Hz , with no more than 0,1% total harmonic distortion.

Further, this practical power output is protected with a power supply using a large transformer and a pair of 10,000 µF electrolytic capacitors for excellent voltage regulation so that low-range dynamics never suffer power drain.

Power Protection Circuit - No On/Off Noise

Pioneer uses both an electronic circuit with TRIAC (a bi-directional triode transistor) and a fuse circuit in the protection section of the  SA-6800 II. Thus the all-stage direct-coupled power circuit is never endangered by irregularities, and the connected speakers never face the threat of shorts. The protection circuitry also employs three transistors to eliminate the unpleasant power on/off noise.

Tape Monitor/Dubbing for Two Stereo Decks - two tape monitor switches on the front panel give you easy control of two stereo tape decks for recording, monitoring  and dubbing from deck 1 to deck 2.

Tone Control Uses CR Circuitry;  Low-Noise Low-Distortion

The two-transistor (PNP-NPN) tone control section of the pioneer SA-6800 II uses select low-noise, low-distortion CR elements to expand dynamic range.

The CR elements permit versatile tonal adjustments so that you can more precisely match the acoustical properties of your listening room, and to allow you to get the most out of your phono cartridge. The bass and Treble controls each have 11 click-stops for convenience. There is a Tone defeat switch which permits you to cancel the tone controls at a touch (to "flat") without changing their settings.

Loudness Contour and Speaker Selector - a loudness contour is provided  to compensate for low-level listening drop-out in human hearing at lower and higher frequencies. The speaker selector switch has Off for headphone listening. A or B or A+B two-pair stereo speaker system selection.'

Note : Japanese Voltage AC 100V

Price : RM 480
Contact Simon Ting 012-3612507

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