BGW_103 - Preservation Sound

fitw, l,s/ i'Like all BGW products. the Model 103 Stereo Systern ControlCenter has been designed to be of the hjghest quality andmanufacture. And roo, ljke other BGW products, the Model l0lshares the s:rne w,orld-[espected reputation of fine professionaJsound products which has made BGW a leader tn accurate,reli:ble:lnd advanced audio components.Utiiizing the firosr recent circuit design techniques. Jow noiseparallei br-polar semiconductor\ have been jntegrated tnto :di!crele component Format. The crjtical phono sraqe provides alevel of perforrnance unmatched in J reason?bly pricedpreampljfler. This advanced desrgn phono sectton fe:turesadjustable input capacltance for optjmum cartridge loading.lntegrated circults cannot match the performance ofa discretedesign and are not used in the new ModeJ 103 preamp.A full featured preampllfiet jt embodies all necessaD/ faciliries fo|the advanced audiophlle. Two precision detented tone controJsselect active equalization circuitry which contributes no dtstortlonand provrdes a wide range of control. A tone control defeat switchis provided. The detented Volume and Balance controis arecalibrated to enable accurate and repeatable sefijngs.Compatible wilh any signaJ source. lhe Modei l0: lnco|poratesan aclrve lBdB/octav€ subsonic fiJter lhrs feature reduce5annoying turntable rumble and irritating iow frequency feedb:ckFront panel lape rnonitoring wiih.r headphoneJack permirsseJection of eithei of t\,.,o tape rnachin.-s. A powerful outpui siegecapable of driving 600 ohm lifies allows the user to place thepower ampiifier al a considerable djslance from the i0j with nohrgh frequency signai loss.lnslde the l0l you'll find miljrary !lr.rd../qJass epoxy clrcurtboards. On the rear panel ofihe 103 ! heavy-g;uge steeienclosurethere are farilitjes for easy hook up ofexternai equalizers .rnd thelatest noise reductron or delay systefils.The 103 \ fuli pro wrdth, black anodized and grarned fiont p:rnelmatches any cornpanion BGW power ampljfier: An oplionJlw.1,nul \en-aet enLlorLtte i\ .rvdtl.rbieThe 103 uses a highly sophisticated reguiated power supply Tentransistors and a toroidal power transformer used in a novel ctrcuitprovide absolutely pure power to the critical circuitry Thistechnique along with the paraliel rnput circuitry allow rhe 103 toachieve an84dB signal-to-noise ratio lunweighted20 Hz-20 kqz 'mpressive referrcd to 10 rnillivoltsJ.Surrounding the Model 1035 jnput selector control areJight emifting diodes which assist jn easy and positjve sourceidentification.

SUaSO IC FlltER FREOUENCY RESpONSE lToplLINE AMP FREOUENCy RESpONSE lAottomlTRANSIENT INTERTIilOOUT,ATiON DISTORTIONINPUTSIGNALTe$ Equlp.ncnt Utlllzed:Hewle( P:ckard l39A D srorlronAnatrerHewler Pacr;rd J585A 5p€crrunr AnaryzerHewletr Pi.r.ar.i ll25A iwFen GpnF,,r.'K hron€- H ite 4IOOA Square Wave sourceHewlen Packard 70358X Y RecorderTektron/x DM 5024c Log ConverrerVz ha la 2000 I DrqrralWa(merer+ 4 dBm nput L"-ve.l0 Hz EandwidrhTI,M. RESPONSE OF PHONO PREAMP/LINEAMPPHONO PREAMP NOISE CHARACTERISTICS0dB = 0d8vOlrpurOutpul level +4 dBr. -.rH.D. SPECTRUM lt kHzlSPECIFICATIONSGaln:lnput lmpedan(e:lnput Overload:DJmamlc RangelPhono Scctlonl:Maxlmum Output \bltage:Phono to Tape Output 40 dB at I kHzHigh Levet Input to Line Outpur:20d8Phonol 42000 ohms in pa tallel with 200pE 275pE ot 450pELewl hputsr 90,000 ohmsPhono:l00mv@lkHzHigh Le\€l:6.0\ olts95dB @ main output lphono thru main out)Line Ouri I vols RMS into 600 ohms l+20dBm)Phono At Tape Output l0 volts RMS inro 5,000 ohms.Total Harmonlc Dlstortlon: Less than 0.01% at rated output 20Hz-20kHz.Nolse;+ 4 dBm OL{pur L€vet. .Phono inlLine Amp O!rPhono equivalent input noise = .4 micro!4?lt with input shorted over 2OHz 2OkHz 5/N ratio = bens than 80 dB lunweighred).High level to line output greater than 90 dB betow rated outputTone Control Equallzatlon: t l5d8 at 50Hz and lskHz, front panel defeat switch removes tone conrols fiom circuit.Subsonlc Fllter: -3dB at 20H2. Active 18 dB Der octave.Frequenay Rcsponse:lnputs:AC Outlet:+2.5dB ?1Hz to 20kHz ftom high le\,€l inpu6.!25d8 of RlM2oHz to 2OkHz frcmFour high levelinputs ll tunel I auxitiary 2 bpe, I equatized phonol.One Switched, t\A/o unswitched.Power Requlreme.rts: Approximately l5 wads at 90-130 or 180-260 VAC 50/60H2.Dlmenslons:Welght:3W Xl9'X 10V2" lH.UlD.l 18.9 cm X 48.3 cm X 26.7 cml*13.5 lbs ner (5.8 kgl 17 lbs 173 kgJ shippihqAlrspec ticarons ard fearures are slbjectio ch;nqe without noticeloptionalwalnut enctoslre not r.c udedHawthornc, Callfornla 90250BGW S)atcmr, 13130 South Yukon Avenue.ln Canada: Omnlmldla Corp., 9653 Cot" d.Llcssc, Dorval, Ouebec H9PIAEGW r0350M rr79