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SPECI FICATIONS Semiconductors fCs... 3 FETs. 2 Transistors ..... 41 Diodes 31 Amplifier Section Continuous Power Output 0f 65 watts.per channel, m¡n., at 8 ohms from 20 Hertz to 20,000 Hertz with nomore than 0.02 % total harmonic distortion or 65 wattsper channel at 4 ohms from 20Hertz to 20,000 Hertz with no more than 0.03% total harmonic distortion. Continuous Power Outpufat lkHz (bothchannels driven) T.H.D. 0.02o/o,8 ohms . . 70 watts per channel Total Harmon ic D istortion(20 Hertzto 20,000Hertz, 8 ohms, from AUX) continuous ratedpoweroutput . . No more than0.02o/o 32.5 watfsper channel poweroutput . . . No morethan0.02% I watt per channel poweroutput . No more than0.02o/o Intermodulation Distortion (50 Hertz: 7,000 Herfz = 4:1 , 8 ohms, from AUX) continuous ratedpoweroutput . . No morethan0.02o/o 32.5watts perchannel power output ..... Nomorethan0.02% 1 watt per channel poweroutput . No more than0.02oA Damping Factor (20 Hertzto ,20,000 Hertz,8 ohms) . 35 I nput (Sensitivity/l mpedance) PHONO . 2.5mV/50kilohms TUNER . . 150mV/50kilohms AUX. ..150mV/50kilohms TAPEPLAYl,2 .. ..... 150mV/50kilohms TAPE PLAY 2 (DlN connector). . . 150mV/50kilohms Phono Overload Level (T.H.D. 0.01%, l kHz) PHONO .. 200mV Output (Level/l mpedance) TAPEREC1 .... . l50mV/lkilohm TAPEREC2 .... . 15OmV/lkilohm TAPE REC2 (DlN connector) 30mV/80kilohms Speaker . A, B, A+B (4 - l6ohms) Frequency Response PHONO (RIAA Equalization) 20Hz to 20.000H2 10.2d8 Tone Control BASS . ... +7.5d8,-7.5d8(100H2) TREBLE +7.5d8, _7.5dB (10,000H2) Subsonic Filter. 15Hz (-6dBloct) Loudness Contour(Volume controlsetat -40d8 position) . . . . . . . . . +6dB (100H2),+3dB (10,000H2) Hum andNoise (lHF, short-circuited, A network) PHONO .... 86d8 . TUNER, AUX, TAPEPLAY . . IOOdB Hum and Noise (DlN continuous power/50mW) PHONO 70dB/60d8 TUNER, AUX, TAPEPLAY . 86dB/61d8 Muting -20d8 Miscellaneous Power Requirements HA model . .220V.50160H2 HRmodel ..240V,50160H2 S, S/G models 110V/1 20V 1220V 1240V, 50/60H2 Power Consumption HA,HRmodels .... 600W S, S/G models 190W Dimensions .... 420(W) x150(H) x337(D) mm 16-9116(w) x s-7l8(H) x 13-1l4(D) in Weight (without package) . . . . 9.7kg(21 lb. 6 oz) Furnished Parts .Operatinginstructions ..... 1 Fuse 2.5A (S,S/G models only) . . . . 1 Fuse5A(S,S/Gmodelsonly) . ..... 1 NOTE: Specifications and the designsubject to possible modifi- cationswithout notice due to improuements. * Measured pursuant to the FederanlTrade Commísíon's Trade Regulation rule on Power Output Claims for Amplifiers. TUNER, AUX, TAPE PLAY lOHzto 50.000H2 tl dB

Pioneer SA708 Schematic

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Specifications and schematic for vintage Pioneer SA708 amplifier

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Page 1: Pioneer SA708 Schematic

SPECI FICATIONSSemiconductorsf C s . . . 3FETs . 2T r a n s i s t o r s . . . . . 4 1Diodes 31Ampli f ier Sect ionContinuous Power Output 0f 65 watts. perchannel , m¡n. , at 8 ohms from 20 Hertz to20,000 Hertz wi th no more than 0.02 %total harmonic d istor t ion or 65 watts perchannel at 4 ohms from 20 Hertz to 20,000Hertz wi th no more than 0.03% totalharmonic d istor t ion.Cont inuous Power Outpuf at lkHz (both channels dr iven)

T.H.D. 0.02o/o,8 ohms . . 70 wat ts per channelTotal Harmon ic D istortion (20 Hertz to 20,000Hertz,

8 ohms, f rom AUX)continuous rated power output . . No more than0.02o/o32.5 watfs per channel power output

. . . No more than 0.02%I watt per channel power output . No more than0.02o/o

Intermodulat ion Distor t ion (50 Hertz : 7,000 Herfz = 4:1 ,8 ohms, f rom AUX)continuous rated power output . . No more than 0.02o/o32.5 wat ts per channel power output

. . . . . N o m o r e t h a n 0 . 0 2 %1 watt per channel power output . No more than0.02oA

Damping Factor(20 Hertz to ,20,000 Hertz, 8 ohms) . 35

I nput (Sensi t iv i ty / l mpedance)PHONO . 2 .5mV/50k i l ohmsTUNER . . 150mV/50k i l ohmsA U X . . . 1 5 0 m V / 5 0 k i l o h m sT A P E P L A Y l , 2 . . . . . . . 1 5 0 m V / 5 0 k i l o h m sTAPE PLAY 2 (DlN connector) . . . 150mV/50ki lohms

Phono Over load Level (T.H.D. 0.01%, l kHz)P H O N O . . 2 0 0 m V

Output (Level / l mpedance)T A P E R E C 1 . . . . . l 5 0 m V / l k i l o h mT A P E R E C 2 . . . . . 1 5 O m V / l k i l o h mTAPE REC 2 (DlN connector) 30mV/80ki lohmsSpeaker . A, B, A+B (4 - l6ohms)

Frequency ResponsePHONO (RIAA Equal izat ion)

20Hz to 20.000H2 10.2d8

Tone ControlB A S S . . . . + 7 . 5 d 8 , - 7 . 5 d 8 ( 1 0 0 H 2 )TREBLE +7 .5d8 , _7 .5dB (10 ,000H2)

Subsonic F i l ter . 15Hz ( -6dBloct)Loudness Contour (Volume control set at -40d8

posi t ion) . . . . . . . . . +6dB (100H2),+3dB (10,000H2)Hum and Noise ( lHF, shor t -c i rcu i ted, A network)

P H O N O . . . . 8 6 d 8. TUNER, AUX, TAPE PLAY . . IOOdB

Hum and Noise (DlN cont inuous power/50mW)PHONO 70dB/60d8TUNER, AUX, TAPE PLAY . 86dB /61d8

Mut ing -20d8

Miscel laneousPower Requirements

HA mode l . . 220V .50160H2H R m o d e l . . 2 4 0 V , 5 0 1 6 0 H 2S, S/G models 1 10V/1 20V 1220V 1240V, 50/60H2

Power Consumpt ionH A , H R m o d e l s . . . . 6 0 0 WS, S/G models 190W

D i m e n s i o n s . . . . 4 2 0 ( W ) x 1 5 0 ( H ) x 3 3 7 ( D ) m m16-9116(w) x s-7 l8(H) x 13-1 l4(D) in

Weight (wi thout package) . . . .9 .7kg(21 lb. 6 oz)

Furnished Parts. O p e r a t i n g i n s t r u c t i o n s . . . . . 1

Fuse 2.5A (S, S/G models only) . . . . 1F u s e 5 A ( S , S / G m o d e l s o n l y ) . . . . . . 1

NOTE:Specifications and the design subject to possible modifi-cations without notice due to improuements.

* Measured pursuant to the Federanl Trade Commísíon'sTrade Regulation rule on Power Output Claims forAmplifiers.

TUNER, AUX, TAPE PLAYlOHz to 50.000H2 t l dB

Page 2: Pioneer SA708 Schematic

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