Glossary of Terms • ,0fet...0 ty acs Of cartridges rnagutic and ceramic t,e.e., referred to as crystal) Magnetic typesore more expensive good, but ei well designed DrOl , C CC ,, r.dge can offer as good if not better sound mognenc cartridges FET' FIELD EFFECT TRANSISTOR) • #,Pricils designed transistor that reduces noise inter •• • -tt_ end improves FM sensitivity It is particularly ,o•tc•-t ,t the receiver or tuner is located near on FM .atom no station FM SENSITIVITY • voy rating to determine the ability of FM tuner ~,ons to pull in weak stations It is usually rated in c•o volts the lover the better FREQUENCY RESPONSE o b,hty of the equipment to reproduce audible sounds n, nJrnan ear con detect sounds as low as 20 Hz and c h,gh as 5 000 Hz A good system should amply .er th.s audible range The lower It starts and the ar e , it ends indicates the reproduction of better able sounds HI-CUT FILTER that cuts off high frequent es at the top where may nduce has and other noise LOUDNESS COMPENSATION listening to music at low volume the human ear o :ames less senstlore to low and high frequencies The o .„oee,s compensation or loudness control) will boost co•n Pass ono treble while overall volume is lowered 5.:: Sony compact music systems have loudness :o—b,nsahon built into them LOUDNESS SWITCH designed switch for the audiophile to put on , 0 4 i loudness compensation for particular music • art.cular rust? MUTING rjrnoyng noise between FM stations It helps I. • 5f0 1 ., tuning note enjoyable QUADRAPHONIC c—er's.on ,n Illus.( systems that recreates the • , nce c,‘ Me ((Sri performcince by enreloping the .1. r -01,01 sound from fo u r speaker channels ,ista6tirs p•oNode both rightiondileft separation ,roe,mn.ora stereo and front and bock separation •i urn speakers produce the sound as heard directly , Orchestra and the bad speakers recreate the a •ecr, neilecied sound th a t is vool to the fall line r•'a see OrnO‘eece SELECTIVITY m• owl , . of a receiver to reject unwonted neighboring This moles Mallon selection easier This is .-._times referred to as "channel separation "I SIGNAL TO NOISE RATIO (S/N RATIO) 4. 'ono to indicate the efficient amplification of sound at minimum noise level that may be produced in 1.-0 equipment Indicates how quiet the receiver output wLI be during pauses in speech or music It is specified in oP., the higher the number, the better the performance SOLID-STATE IF FILTER A soecial IF filter developed by Sony to obtain utmost selectivity from receivers All Sony compact music systems incorporate this - solid-state" IF filter instead of regular IF filters in their tuner sections SPEAKER SELECTOR SWITCH special switch that permits you to operdte an extra pair of speakers in another room instead of-using the main speakers Some Sony models allow you to operate both sets of speakers simultaneously. SO' (STEREO QUADRAPHONIC.) A special Stereo Quadraphonic system adaptable to 01l SONY units with tape monitor facilities. Its unique advan• loge is that SG does not obsolite existing two-channel stereo records, tapes or broadcasts. In fact, it enhances them by adding additional ambience. And SO record ings can be played on standard stereo equipment without the purchase of extra accessories. STEREO SEPARATION Indicated the equipment's capability to reproduce left and right sound sources respectively as musicians play. Good separation means that the "original" sounds, once they're recorded, come from the same respective sides through the speakers It gives° better stereo effect or more "concert hall realism - One way to evaluate good stereo separation is with your own ears Another is to checu the dB rating for stereo separation on the manufacturer's specifications, the higher the better TAPE MONITOR SWITCH .0 special switch that provides monitoring to assure proper sops recording "off the-air" or records while either one is terry played With two tape monitor switches there is ^-a•e ilexibility to adopt two tape recorders, or one tape recorder and the OW 4-chonne!DerocerlAmplifier WOW _FLUTTER Both are sound disturbances d. 2 • vacations in speed turntables or tape recorders .'/OvI" creates a low- Ditched err Ovenng sound "FLUTTER" creates a high pitched wavering sound How to listen A choice in Loudspeakers is not as subjective as many people claim. A novice. listener will not know what the characteristics of"showroom" equipment can do to mislead him. He will too often listen for obvious defects" (many of which are 1. Bass response. When you listen for bass, which is traditionally what people listen for first, make sure that you use a record or tape that has really deep bass on it— not just medium-deep bass like you find in most rock recordings. Use something like a pipe organ, or a close-miked bass guitar. Bass drums (big ones) recorded in large halls also test deep bass. Many speakers unable to reproduce the deep, deep bass_have a peak in the mid-bass region (100-200 cycles). Such speakers sound like they have a lot of bass but get muddy sounding when you add bass with tone controls. Try to notice whether bass tones have a definite pitch (like they should) or if their exact pitch is undefined. 2. High frequency response. Most speakers will reproduce high-frequencies, but many con centlrate high frequency output in a narrow path in front of the speakers. This is not an "obvious defect" when listening in most stores but can lead to very poor fidelity in a small room or wherever one can't sit directly in front of the speakers. One easY i test is to tune an FM receiver between stations where you hear only hiss (a random mixture of high'frequencies). Walk by the front of the speaker and notice if the hiss seems to become lower in pitch as you go off the Center. With a good speaker the effect will hardly be noticeable. On music, a bearhy speaker (bad news) will be aifficult to balance, and the sound will seem to come from whichever speaker you are closer to. As a result the sound is likely to sound more mono than stereo, espeially in a small room. A good high dispersion speaker will give outstanding stereo image any where in a room. 3.; Overall frequency balance. (The relative quantity of bOss_versus mid range vs. treble.) OUR BEST SPEAKER VAtif What the critics are saying • ;'Top quality performance" • "First good omnidirectional loudspeaker" • "Smooth wide range— full low bass" • "Linear transient response" • "Small size— big sound" • "A natural for quadrophonics"' • "Another Hegemon contribution to hifi art" The Hegeman is o compact low cost loudspeaker system with the openness and integrity of sound which are charac teristic of professional systems. The first in a ramily of point source loudspeaker system & I the negeman I utilizes a hem, spherical radiation pattern which produces optimum balance between direct and reverberant sound. The result is on effective sound source far larger than the physicol size of the cabinet In n handsome teak finish with charcoal grille, the slender enclosure stands just over two feet toll Its graceful Imes fit well with modern or traditional room decor for Quality. not the speaker's fault) rather than the more subtle (but recognizable), attributes that diStinguish a really fine speaker. Heie is a list of things'to listen for and how these characteristics relate to speaker quality and ultimate listening satisfaction. This is especially difficult for a beginning listener to judge, but fortunately most big-name brands have fairly good balance. 4. Transient response. This is where mast beginning speaker buyers make mistakes. A speaker with good transient response will re produce bursting sound (like clicking noise, or most percussion sounds) with an open, lifelike clarity. Unfortunately, good transient response will expose weaknesses in the rest of the com- ponent system very readily— and a beginning listener will blame what he hears on the speaker. Record defects, mistracking of the stylus, amplifier clipping (distortion due to lack of power) will be exposed completely by speakers having good transient response. So when you listen to speakers, make sure you use a clean record or tape that is free from pressing defects, and listen through amplifiers having plenty of power. Speakers, unless pushed to very high volumes rarely distort at high frequencies. If you hear distortion at moderate volumes then the distortion is probably in the source— not the speaker. It may be • • reduced by using the high filter or turning down the treble and/or volume controls. Though a speaker with such good transient response may expose many defects, it will sound much better on clean recordings than other speakers. On music, a speaker with poor transient response will make drums sound muddy. A solo trumpet is a good test too; it should have considerable "razz" on an accurate speaker and will sound too smooth on a poor speaker. Remember— defects in the source should be eliminated at the listener's option with the amplifier controls, not automatically all the time by a deficient speaker. Over the past twenty years, Stu Hegemon hos beet responsible for the successful development and mai ing of S2O-million worth of high fidelity products. together with a balanced team of experts in engine ing design, business administration, market planni and sales, Stu Hegeman has organized . A. Stewart Hegeman, recognized as one of the creative engineers in the high fidelity industry. Her what the critics say: "The name of Hegemon is to hifi what the names of Bentley and Bugatti are in automotive lore. Like thi renowned car builders:Hegeman'has gained his fr as She creator of 'classics.' Some of the hifi compoi to which he has contributed . have become collectors' items. "Hegemon's ingenious design for loading permits much smaller box than any previously used with thi astonishing driver." Est. - $ 1 I Popular Elec Hegema Loudspeaker System
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