5196105894

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AUDIO New Eguipment Reports

Stereo S/N ratio(at 65 dBf) Mono S^N ratk> (at 65 dBf)	69% dB 74% dB
CAPTURE RATIO	1%dB
SELECTiVlTY(alternate*channel)	60% dB
HARMONIO DISTORTION (THD ♦ N) stereo at 100Hz 0 44% at 1 kHz 0.20% at6kHz 0.50%	mono 025% 0,21% 046%
STEREO PILOT INTERMODUIATION	0 17%
IM DISTORTlON(mono)	0.10%
AMSUPPRESSION	62% dB
PILOT (19 kHz) SUPPRESSION	72% dB
SUBCARRlER(38kHz)SUPPR	57% dB

AmpNfter section

RATEDPOWER    18%dBW(70watts)/channel

TUNING t EVFl •MuTiNG

MEMORY

MEMORY

SCAN

FM/AM

AUTO

/MANUAŁ

TUNING--—

J C

anel inc/ttdes memory and scanning Controls discussed in text.

Tuner-programming n,

Notę. in partie u far. the tunin<>/muting pilots at upper left (herc at the midd/e set ling), iheanto timing pilot next to lnem, and the signal-strenyth display (which. as in recent modelsfrom severa! companies. suggests the invetse oj a ifuieting cnne. willi "fuII performance"achievedat the middle LED). Freynency-callout strip, across midd/e. eon he removed and altered at will w hen vou c hangę memorized stations; Son v supplies preprinted translucent "Windows" with receiver.

OUTPUT AT CUPPlNG(bolh channels doven) 8-ohmload    20'/* dBW(i06watts)/channel

4-ohmioad    21% dBW (141 watts)/channel

16-ohmioad    i8dBW(63 watts)/channei

DYNAMlCHEADROOM(8ohms)    1%d8

HARMONIO DlSTORTlON(THD; 20 Hz to 20 k’Hz) at 18%dBW(70wat1s)    50.020%

atOdBW(lwatt)    50011%

FREOUENCY response

+ 0. -% dB. 10 Hz to 40 kHz. -3dBat 175 kHz

RIAAEOUALI2ATION

fixed-coil mput    ♦ '/». -0 dB. 20 Hz to 20 kHz;

♦ '/• dBat5Hz

moving-coil inpul    ♦ %. -0 dB. 20 Hz to 20 kHz;

-%dBat 5 Hz

INPUT CHARACTERISTlCS(reOdBW. A-weight.ng)

sensitivity    S/Nratio

aux mput    14 mV    78% dB

ftxed-co«lphono    0.22 mV    77% dB

movmg-coil phono    27 pV    75% dB

PHONO OVERLOAD (clippmg at 1 kHz) tixed-coti input    120mV

moving-coilmput    12.5 mV

PHONO IMPEDANCE

fixed-coil mput    50kohms;210or 360 pF

movmg-coil mput    HOohms

OAMPING F ACTOR (at 50 Hz)    63

INFRASONIC FUTER -3dBat 15 Hz. % i2dB/octave to trip the signal-strength indicator*s first LED and the tunefs stereo switching) can be sweep-tuned. The next setting needs 41 dBf (betwcen signal-strength I.F.Ds 3 and 4). while the top setting needs 56 dBf (the threshold of the top signal-strength LED). Thus. the threc make useful discriminations of minimum desired quality in the tuned signal.

Ali this adds up to an unusual de-gree of tuner flexibility without letting the microprocessor run amok (as sonie designers permh ii to do). Our only res-ervation about the tuner section—and one that.admittedly. isofinterest primar-ily to fringe-area residents—is the use of the five signal-strength LEDs. with their sharp on/ofT sw itching. instead of a mc-tcr. whose continuous action could pro-vide morę help in antenna orientation. That’s an obscrvation wc‘ve had to make repcatedly in recent issues: in this case there is a unique and partially ofTsetting advantage to applaud: An accessory antenna (the $80 AN-300) can be tuned for optimum results at the frequency se-lected and becomes self-tuning when at-tached to the STR-VX6. thanks to a con-trol voltage supplied via the lalter’s 300-ohm antenna terminals. (There are 75-ohm terminals as well.)

Ali this attention lavished on the tuner section does not shortchange the preamporthe power amp. both of which are equally capable and. in the case of the preamp. equa!lv flcxible. For ex-ampie. there is independently switchable bidirectional dubbing between the two tape decks for which connections are su ppI ied. e na bI i ng copyi ng wh i I e you a re listening to a disc or to the tuner section. There are two oplions for capacitive loading of the “M M" (fixed-coil) phono input. which can be helpful with “fussv^,‘ pickups. If you want to add outboard equipment (say. an image enhancer or speaker equalizer). there are pre/main jumperson the back panel that can be re-placed by the leads to the auxiliarv unit.

Always imponderable are the rea-sons for “Ioving” a given piece ofequip-ment. This receiver is one of those cx>m-ponents that strike us as being somewhat morę than the sum of the parts. The reac-tion seems less than totally rational. making it dirticult to predict w hether you might react similarly. If. for instancc.you are looking for archetypal styling. you won t find it herc. But we can sav that we particularly enjoyed working with this excellent receiver and that it remains such whether or not you happen to share our enjoyment.

Circle 136 on Reader-Sen ice Card

About the dBW . . .	WATTS	dBW
We currently are expressmg power terms of dBW	1.00	0
—meaning power in dB with a reference (0 dBW)	1.25	1
of 1 watt. The conversion table will enable you to	1.6	2
use the advantages of dBW in compartng these	2.0	3
Products to others for which you have no dBW	2 5	4
figures.	3.2	5
	4.0	6
	5.0	7
9	6,3	8
	8.0	9

Dl C t.MBt R I9X|

CONVERSION TABLE FOR POWER OUTPUT

WATTS	dBW	WATTS	dBW
10.0	10	100	20
12.5	11	125	21
16	12	160	22
20	13	200	23
25	14	250	24
32	15	320	25
40	16	400	26
50	17	500	27
63	18	630	28
80	19	800	29

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