kttereo Review FEBRUARY 1975 ONE DOLLAR MABEL MERCER AND THE ART OF CABAh'ET L9P9C 1V Ain XIN3H4 )-111z X08 0 IS ZO MIIWS 1,431!!3 rt8 000f. C6349Z08 ZT692 Retailers: Notice of display -allowance plan is within last three pages. 1HOU1 Complete command with a wide variety of controls Whether it's for AM, FM or headset output levels, Pioneer provides greater operating precision with three independently operated output level controls. A heacset Two 15,000uF power supplies phase distortion, plus substantially better may be used without a following power eclipse anything now available stability with four double tuned phase amplifier. Precision tuning is achieved in integrated amplifies. linear ceramic filters and four monolithic with the aid of signal strength and tuning IC's in the IF section. meters. Even at extremely low frequencies, 6 -stage limiters there's stable power output, excellent AM section highlights IC's transient response and low total The IF section includes 6 -stage limiter harmonic distortion - not greater than circuits. Used in conjunction with The entire AM section, following the front differential amplifiers in monolithic IC's, end, is a unitized IC. A monolithic IC 0.1% at any power level up to 60 watts noise interference is completely elimin- replaces 84 individual components plus a minimum continuous power per channel, ated with a signal to noise ratio of 75dB. ceramic filter. By using a differential amp at any frequency from 20Hz to 20,000 Hz, circuit and a balanced mixing circuit, using 8 ohm loads. Exclusive Phase Lock Loop (PLL) IC there are better spurious characteristics These positive and negative power circuitry in the TX -9100 multiplex section and special AGC amplification. supplies provide absolute stability in all Developed and used for the first time by Great specs for great performance stages, even in the equalizer amp and Pioneer, the Phase Lock Loop (PLL) TX -9100 TX -8100 Tx -7100 proceeding to the control and power circuit is actually an electronic FM Sensitivity (IHF)1.5uV 1.8uV 1.9uv amps. Therefore, the signal Imes become servomechanism. It maintains continuous zero potential to completely eliminate the and precise phasing between the pilot Selectivity 90dB 80dB 60dB usual (and annoying) click noise of signal and the subcarrier, supplying Capture Ratio 1dB 1dB 1dB operating controls and switches. optimum channel separation. Completely S/N Ratio 75dB 70dB 70dB Stability is increased even further by drift free, no alignment is ever required. Image Rejection 110dB 100dB 85dB the differential amplifier used in the first The PLL cannot be affected by Stereo Separation 40dB 40dB 40dB stages of the equalizer and control humidity or temperature since there are no Distortion (THD) amplifiers (also the power amp.) 100% DC coils or capacitors to be detuned. This Mono 0.2% 0.2% 0.2% negative feedback supplies Excellent provides complete stability and reliability. Stereo 0.3% 0.4% 0.4% stability and transient response; it also New pulse noise suppressor in the TX -9100 Spurious Response 110dB 100dB eliminates distortion. 100dB To further operates with computer control increase This circuit operates automatically when The Amplifiers: SA -9100, it is switched on. It effectively blocks radiated noise from airplane and auto SA -8100, SA -7100 ignition systems, neon and traffic lights, Two separate power supplies utilize etc. It does not interfere with frequency 30,000 uF total capacitance response and stereo separation. Whether the signal is weak or strong, this automatic You read it right. The power supply in 'brain' decides when the PNS gate circuit the SA -9100 uses a total capacitance of is to operate. 30,000 uF. 15,000 uF each for the balanced positive and negative power supplies. This Unique muting control completely eclipses anything now A 2 -position variable muting control uses available in integrated amplifiers. This electronic switching as well as reed relay super high capacitance results in an switching. This eliminates interstation absolutely pure DC voltage supply. There's noise and the popping noise of constant DC voltage regulation regardless tuning and detuning. of line voltage changes and signal input. Interior view.SA-S10C, HIGH FIDELITY:"... The AUDIO: "You can't buy performance of the SA -9100 beter audible performance is so exceptional and the than is achievable with many extras in the way of Pioneer's new TX -9100 switching options, and so HI -Fl STEREO BUYERS' (AM -FM stereo tuner) al on, so eminently useful, GUIDE: "(The SA -9100) is a any price." that we find it the most powerhouse of sound level, exciting piece of audio performance and features. hardware we've yet tested Woris like something the STEREO REVIEW: "This from this company." chief engineer had built (SA -9100) is an essentially for I -is own use." distortionless, bug -free, "The Pioneer TX -9100 and powerful amplifier with exceptional flexibility STEREO REVIEW: "... The AM/ FM stereo tuner offers A highly complex array of TX -9100 unequivocally notably excellent perform- ance and sound quality." electronic circuitry has outperforms anything we been packaged into a have tested up to this time." consumer product of relatively modest price without a trace of `haywire' or slipshod assembly. It almost seems a pity to hide Stert3o Review internal worionanship." fourAIFNT TEST REPORTS ...unequivocally outperforms anything we have tested up to this time." P.M,/ 17140000 raiself Complete reprints available upon request. In tuners anda Pioneer is the verybest. there's exceptionally high gain with extremely low noise. Two tuned RF stages with a 5 -gang variable tuning capacitor contribute to the highest selectivity 190dB) and astonishing FM sensitivity (1.5uV). The exclusive use of a heavy gauge lie cast aluminum housing assures uncanny The Tuners: TX -9100, stability. TX -8100, TX -7100 IF section - the epitome of FM front end - an engineering triumph advanced research The height of sophistication, the TX -9100's In the pursuit of excellence, significait new stabilized, drift -free front end replaces IF section technology was developed. The The time has come to printed circuit boards with completely result is optimum selectivity with minimum metallized construction. The same used in completely re-evaluate high precision communications equipment. Employing three dual gate MOS FET's the standard you now and a buffer circuit in the local oscillator, use to judge high fidelity performance. With this new line of tuners and amplifiers, Pioneer presents many ingenious innovations in circuitry that are being used for the first time. However, this exclusiveness is only secondary. While each new circuit can be considered revolutionary by itself, what is even more important is that their combined capabilities achieve precision and performance heretofore unattainable. TX -9100 interior view. Exclusive heavy gauge die cast aluminum Chrome plated shielded front end housing assures uncanny stability. housing and multiplex section. stabilization, special electronic regulator The power amplifier additional convenience. A separate flip circuits are used. Transient response is To sustain the ultra sophistication of the type lever control for instant switching also improved with a superb damping equalizer and control amp sections, the between the more widely used tuner and factor of 70. power amp has a direct -coupled pure phono 1 and any other single program source. Incidentally, both switches are The unique equalizer amplifier complementary SEPP circuit, double differential amplifiers and two constant shielded to protect the input against To make certain that extraneous signals undesirable extraneous signal pickups. do not interfere with the input signal, the current loads. The combined effect is the equalizer amp is totally enclosed and achievement of wide power frequercy Two-way tape duplicating and monitoring sealed to shield it against leakage. range and excellent transient response. 100% negative DC feedback is There are two separate flip type switches There's also extra assurance of on the front panel of the SA -9100 for precision with special low noise metal supplemented by 66dB dynamic negative feedback for minimum distortion and tape -to -tape duplicating and monitoring. film resistors and styrol capacitors. Both Two tape decks can be connected for are manufactured under continuous absolute stability. The pre and power computer control to highest laboratory amps can be used independently with a recording, playback and duplicating in test equipment tolerances: -±1% for separation switch. either direction, with simultaneous resistors; ±2% for capacitors. Until now Exclusive direct -coupling in all stages monitoring. such precision has been unheard of in Until now direct -coupling has been used Level controls for phono 2, aux 2 hi-fi equipment. Deviation from the ideal only with the power amplifier. Pioneer RIAA curve is only ±0.2dB. takes it a dramatic step further in the In order to match the level of various Since a direct -coupled SEPP SA -9100 and SA -8100. Direct -coupling in inputs, individual level controls are complementary circuit is used in the all stages from the equalizer amp to the provided for phono 2 and aux 2. equalizer amplifier, virtually any dynamic control amp to the power amp. More Speaker B control phono cartridge can be accommodated effective? Absolutely. It achieves the This special control helps in the use of two without overloading or distortion. For finest transient response, wider dynamic example, with 2.5 mV sensitivity, the range, with no greater than 0.1% total pairs of speaker systems of different overload at 1 KHz is an unbelievable harmonic distortion. It's an incredible efficiencies. There is no sacrifice of 250mV, and 1200mV at 10KHz! achievement. damping or distortion when switching from Level set, volume one pair to the other. Twin stepped tone controlS. and loudness BASS TREBLE Impedance selector for phono 2 contour controls adjust to listening An easy -to -use switch allows you to preference employ any phono cartridge input a).