Chinese Music, Past, Present and Future
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tereoOCTOBER 1973Review 75 CENTS CHINESE MUSIC, PAST, PRESENT AND FUTURE 471274 IV A41.; Almmno ti SIS3 tINW 13unlosoti 01 FUNS NN311,' 3 ^1 3 iLAON 160150'70iIS Z16Z9Z 40,. /1111. According to Audio Times, a leading it you can't enjoy the increasing publication devoted to audio manu- number of CD -4 discrete discs (the facturing and retailing: "No piece of true four -channel record) from leading audio equipment is as eagerly awaited recording companies like RCA, as the 'one four -channel unit that Warner, Atlantic, Elektra, and others. does everything - i.e., the receiver CD -4 is a 'must' for optimum quadra- with built-in circuitry for SO, RM and phonic listening enjoyment. CD -4 record decoding.' " Since the CD -4 circuit incor- porates FET's and IC's, continuous, It's here! stable performance is assured. In Pioneer has taken another giant step addition, it uses a 30KHz subcarrier forward. Our new collection of similar to that used in FM multiplex quadraphonic receivers - OX -949, broadcasting. The subcarrier is Total Capability Mode Switch - Fingertip QX-747, QX-646 - has this total demodulated by a Phase Lock Loop switching to CD -4, SO, RM quadraphonic capability. They reproduce CD -4, SO, (PLL) circuit for each channel. The sources, as well as two -channel stereo. RM and discrete four -channel sound result is optimum channel separation without adaptors, add-on decoders - absolutely necessary to achieve cr demodulators. And they're specifi- the full, rich impact of quadraphonic Matchless performance with cally designed to fully meet all of the reproduction. Convenient and simple - powerhouse capabilities s.tandards established for these to -use front/ rear left and right natrix and discrete program sources. separation controls are on the front As is traditional with all Pioneer Bearing in mind that two -channel panels of all three models. receivers, the new quadraphonic units is, and will continue to be, a have power to spare. For example, t-emendous source of listening SO and RM decoding bring to lifE the top model, QX-949, has a power pleasure for many years to come, the hidden ambience of matrixec output in four -channel operation, of tiese new units are designed for it, and stereo records 40 watts RMS/channel at 8 ohms, along with their total quadraphonic With built-in RM circuitry, you can 20-20,000 Hz, four channels driven. capabilities. The QX-949 and QX-747 experience new brilliance from your THD and IM distortion is only 0.3% reproduce two -channel with present collection of two -channel at 1 KHz. augmented power due to Pioneer's stereo records and tapes. FM broad- Switching to two -channel rew Power Boosting circuitry. casts, too. Also, new vistas of operation, the new Pioneer Power enjoyment unfold when you play the Boosting circuit delivers 60 watts A whole new world of discrete sound RMS/channel across the 20-20,000 Hz with the built-in CD -4 demodulator new four -channel SQ matrix records being released by Columbia, Capitol, spectrum, with both channels driven, While many quadraphonic receivers Epic and Vanguard, to mention just a at less than 0.3% distortion. I-ave limited degrees of four -channel few of the prominent SQ record By using super -size power capabilities, Pioneer offers maximum producers. No matter what the transformers in the QX-949, in versatility with built-in CD -4. Without quadraphonic program source combination with four 10,000 micro - or the record label, Pioneer's farad electrolytic capacitors, this new quad ra phonic receivers high power output is obtained at very flawlessly reproduce low frequency. And it's further insured them all. by direct -coupling in the output stage. No overload witty speaker protector circuit Since direct -coupling feeds the signal directly to the speakers, an automatic V V1V1V1M1N1k "/611. V1., NA:1MM . ;,1.,==.4.11/4 ODPIONEER aCoANI.,mauves. mac. Qs -o V% INN RI* 83 90 94 96* 5d .111114. - 4 moons= 110... Lam no *if - r t %AAA MAO. 1.10. MOM FLOCT 00,4 GOIPIONEV11 SMANOEL PC.O.V1101 MOM, 74 I OD PIONEER* U.S. Pioneer Electronics Corp., 178 Commerce Rd., Carlstadt, New Jersey 07072 AN OPEN LETTER TO EVERYONE WHO HAS EVER BOUGHT PIONEER EQUIPMENT -- OR HOPES TO Many people who are ardent followers of the progress of high fidelity - and Pioneer's advancements, in particular - have asked us why we have limited our involvement in quadraphonic. The answer is quite simple. By definition, high fidelity means pure, perfect sound repro- duction. The number of channels has nothing to do with this state of perfection. Consequently, we have been directing our primary efforts to producing the finest 2-channel high fidelity equipment available. And we are continuing to do so. During the past two years we have listened with great interest to the comments of consumers and audio dealers through- out the country. There appeared to be a 'wait and see' attitude because of the lack of 4-channel standardization on the part of manufacturers of equipment, records and tape. However, the choice of a standard quadraphonic system has presently been narrowed down to where 4-channel is a viable, practical and delightful reality. For this reason we have proceeded with every bit of enthusiasm and know-how at our command. The result is this new line of Pioneer quadraphonic receivers. These are total capability instruments. They embody all the presently known quadraphonic state-of-the-art. And they compare in all respects to the magnificent capabilities of Pioneer stereo instruments to produce the virtually perfect sound reproduction demanded by the audiophile. If you've waited to buy a 4-channel receiver that could reproduce all quadraphonic reproduction systems - Pioneer has made the waiting worthwhile. We are proud to present to this industry these superb Pioneer "all-in-one" quadraphonic receivers. Sincerely, Zrte/ Bernard Mitchell President source is in operation, the sound controls for front and rear channels, level of each channel can be function and mode selector with monitored by viewing the large scope - multi -colored indicator ligh-s. Further type level indicator on the top two refinement is offered with the models. Left and right front/rear QX-949's multiplex noise and high/ controls permit instant adjustment. low filters, plus signal strength and Indicator sensitivity controls allow for center tuning meters in one housing. a maximum of -30dB adjustments Admittedly, these new Pioneer at any sound level. The level indicator quadraphonic receivers, like fine may also be used to view CD -4 sports cars or cameras, are not channel separation adjustments made inexpensive. However, they represent 110 with the CD -4 separation controls. the high fidelity industry's most outstanding value. We have built =our -Channel Level Indicator - See what Inputs/Outputs for total VPrqafilito them with the same quality, precision you hear. Make instant adjustments with and performance you've come to left/right, front/rear level controls. Pioneer has endowed these models with terminals for a wide range of expect from Pioneer stereD equip- program sources. The only limitation ment. We offer them to you with the is your own listening interests and same pride and conviction :hat has electronic trigger relay system is always compelled you to say - used to protect the speakers from DC your capability to experiment with sound. "Pioneer, the very best." leakage or overload. QX-949 - $699.95; QX-747 - e.D $599.95; QX-646 - $499.95. Prices New and exclusive include walnut cabinets. Power Boosting circuit Along with the total capability of U.S. Pioneer Electronics Corp., When switching from four -channel to these receivers, Pioneer has incor- 178 Commerce Road, Carlstadt, wo-channel reproduction, power is porated a wide array of additional, Naw Jersey 07072 substantially increased with the new meaningful features. All three West: 13300 S. Estrella, Los Angeles and advanced Power Boosting circuit, instruments include: loudness 90248 / Midwest: 1500 Greenleaf, as described above. This exclusive contour, FM muting, an extra wide Elk Grove Village, Ill. 60007 circuit is built into both the QX-949 tuning dial, two sets of bass/treble Canada: S. H. Parker Co. and QX-747 models. Another plus feature attributable Specification -o the Power Boosting circuit is Amplifier OX -949 OX -747 OX -646 simplified switching from four -channel 4-ch. RMS power, 8 ohms, 40 watts/ 20 watts/ 10 watts/ lo two -channel operation. It can be 4 channels driven, channel channel channel (1KHz) instantly achieved without the usual 20-20KHz re -connecting of speaker wires. This, 4-ch. IHF 240 watts (80) 160 watts (80) 80 watts (80) too, is a Pioneer exclusive. 380 watts (40) 220 watts (40) 108 watts (40) 2-ch. RMS power, 8 ohms, 60 watts/ 40 watts/ 13 watts/ A tuner section the equal 0 both channels driven, channel channel channel (1KHz) -eparate components 20-20KHz The FM tuner section of the QX-949 2-ch. IHF 150 watts (80) 120 watts (80) 40 watts (80) s truly an engineering accomplish- 230 watts (40) 170 watts (40) 54 watts (40) ment. It incorporates two dual -gate THD/IM Distortion 0.3% 0.5% 1% MOS FET's in the front end, plus (20-20KHz) (20-20KHz) (1KHz) three ceramic filters and 6 -stage FM Tuner FM Sensitivity (IHF) 1.8uV 1.9uV 2.2uV limiters in a monolithic IC in the IF (the lower the better) stage. The result is superb sensitivity Selectivity 80dB 60dB 40dB and selectivity, and excellent signal (the higher the better) to noise ratio. Capture Ratio 1dB 1dB 3dB (the lower the better) Advanced circuitry includes Dolby S/N Ratio 70dB 70dB 65dB adaptor input/output and 4 -channel (the higher the better) broadcasting multiplex output terminal Inputs Phono 2 1 1 n anticipation of the future use of Tape Monitor 2 (4-ch.) 1 (4-ch.) 1 (4-ch.: discrete quadraphonic broadcasting, 2 (2-ch.) 1 (2-ch.) 1 (2-ch."! :he QX-949 and QX-747 include a Dolby adaptor input 1 (4-ch.) 1 (4-ch.) quadraphonic multiplex output Auxiliary 1 1 1 -erminal.