Fender SRA 400 User's Manual
Contents
1. QNA 5 TUS US EU SOUS RETE ER EAT USER DENM UAM ire ADAC AGRO YU Se LS Us N xig ee EDD ec T 5 220 toto d E AUCH a veis AA iS SURES AE WAR eser J ot ER ES f E y NDS E EEC EPI m WT S ANE RE AREAS VASA A XC MY oe een ARIS a Eel MSP ANRT RENE TPE ROSE 0 ESS TR RR TS BON M SE RAD 2 iE SEA A ER el TK n AVES BT PESE rper rS 4 NE vwd Mi TA eiae lt DX Ep a a DAEs YA YAPA AE u SSS S ee Bite Ghent Ia ee y MEME 55 5 n URNAM ISERE Eun eter y a NI e yQ AE TE CR pi PRES SASS ss eu RU reU TES Wy Bee eye e AE eti z AR K2. yer VENIT e ura A ayu A tS VISA R ICRA HU Ste Fired hE i MAT STE eae at ee te RASE es OE AR ed ADU cred ID Wee VE I GENIS x m Y DL EM 3 uH Na Bod Tia te OEE Mi SE UE APIS Lus iQ Re A ot ga x4 Spee eles ary wd hte Heer pe Bt EE Aree PER Wt qu ede Be SE ERS Sea Te UA QUSA Rite E SS PORE SE ri Uy whe SS ERES IDA Ea CY AES a pO HP us BB ESS ELS ait PCE ES NCES ge ECO EN LEE gt i NOEL ADD 44 URA PAS Mei ATR CHARS Gere scar DES Hyd et E NEIN uuu eMe Ue nera c PLE PROS Fe LAM er J AD RE US T ER ET 5 RSU SUA Reg AQ Im Ew dixe UD EY ha Sas ARA AE uL RS PRET TE TS SP SEM OE rus LU Ves e IRL So
3. i RACES ed BERNER GE Bee RE PUN HIT SOE M yu Idee RE RI SE ERISA 55159 V ERN SEC EEE EE Se A sU VERA See EN AES rip RARE EE EE EMER ULES reg e Et Note t eet reel RAS TERRE NI RSS NA NIE ST RAYS i 5 ERR SI ARAN E C VEEN EE RS NS ER SES 2 Se ESE SE Mean Epes AE PEN AR SN MERE te D E 5 94 per e eee 5 SSRs PSS 2 3 TR AR NES ee e en SUD RUE A MAS EEE RA AU SES T E dion RDS DES SO ERNEST A SEE ODE PR DOR tn ane ves s 5 MAUS DAE gt de 5 SELES Au DESI AR EN REDE v 2 gt SE NS EE A RT e 5 n TA SERA 25 M 2 5 a Ro EASES e T ANE AM WOW CARNES ER RES SR
4. DN at MEI EARN ee um ess ID DNS GS rrr uM Mie RM VEDI dde ERN PV EM SY SE 8 UAE PQ huu EV ne QE AE MERE PER hg i ES e RD LU re SERI P eI Sal Soh DEA Si en fed a s Tne PAR i EE REO SITUS age gtd E RADAR M A M RT AER A AD ARN TE ERES Py au AS RT ES PALA SP PV ue TOA ry SE SPIT em eis INGENII RE EA I EA DR MEE NEN yO ES EES AEE iam S ET EL A eA 5 ASAP a STE Mn MALA AS DU RIA INS LAN A Bee eli Bsa a p UA oo E RES Ier DAS igi e ag d t sa a PA A Y E ics M E SE PS MH EE E MOTA T PVT S Mere A nies AE Ve AS gin MVC Z else nae Ape Miche uu NE AUS Eee Adi Le RE VARY xoig ea MEN MIRA UR CUP TASA n ron s CHOICE EP feet OL ea Sue DONE EARS x A PAS DER ICO ES DEN TAN TOI
5. 5 EN NN EC NS E OH UON RLS AAA TEA T mop So RR EE ONT ES AERE ES MSAN MTS Am 52 CUM 3 z 2 Latine ie Fe ER SSS er MONE Se AE IL EEN EE SN EL SRE EAA CAA AM pi s Bi fe 5 DESY s Ives PELO VOTES z PAC SAR PER DM LE RSR HIM M MEE a See M ACRE Soe NU JASE ed es Uses Se Pee See ARE NE NE meng saree SEER INE IEE ORR E 5 x x m E PNIS x 5 5 2 H xs PR REA NERO D S NEA SR PEER SO A ER 2 zi j SANA SSE OME Qa eel E MENNRSSIMAIS NE tie AE See SE ES mn pui EOD UM E 2 at SNE AT SUSE UA TERRES A NAAR mu uo 3 SEMINE IM SSS D i MR RN MEE REM US Sepe NT NM M uris D M Se ure S MTS t
6. E x 5 Sv Vut d es VERMES MEUS VISUM xS E UNUS NIU EU ES 5 NA 95559 AS lt 2 SN gt S 5 SP SESS 2 RARE 5 SERVA gs WP MR RIS PESE ee CEE D PER UHA TI EPR 3 PPS AE Lee TCU ne EE ee ER TE CNET ORCUTT LIAO ORA EREMO RCD EMEA PRET FT py TON EL gt 26 lt ETES EE A 2 RINe RN RETO ath de d n m n p M T
7. SSSR SEERA ROR OSINA Basson AM SSE NSS PS RER 2 2 5 SERS VUE x ADEL AN ONE MR RT GE ES 2016 2 RAR D AVI P gt S Be OU m PE Sat Rene y 52 E SES Q LS MOLLE NS ELS e WO TREO x RATE SESS E E DRE RTE WAREN ERO RASE eRe RD dI Uere RSR CANON RP REIR Nd AU UA CR ADR RA ANS 2 SM M M E 525524 PURO D pss z OCU Bene eT OR e nM Wang s Re SR CS p 3 92 252 225 5 AUN ES NES RO 2 552222 Seth 22 EGO SE GS acl Gace SRE De AM UL AU S NON SEES IH 5 x T E 25 VELAT RUE 32 229222 5 PSS NS AR PR RENE RE ES TU RU MUN M uu dE 23 2222 SS Se EC m 5 2 8 gt SEES RENE 52265 gt A e DAS SES eee oe 525 5 RES 222 75222 lt RR SEAGIG aS 222 onnection 2 SORS PE
8. NET x 2 ERS BSS NUR S T AD 2 eU CR ur ARR SCENES MAR CRE DIE LP MA MES d UM M ME A ERE PPS 55 M SSO Bee 2 TRS BARES gt SR VOU e Res ME ee EA us EY Pw tan A Be kee SS 2 2 2 SASA Z es s SAU D ERE MIA zu SUELE EQ MEUSE SN D A e ES A SS FO DD CEDE 926 T RER PD RA HENRI Be Sra eee ea SAN ASO RUM BS SN Sat asi 28 gt CES 50200 Gy d 39 Mes Nee RE IES POET x 222 TRES MA B RMS 5 r E s 5 QUA 8 ANS s 23 lt R S Be PEN RSS 20 A um POS LATE lt SE CREE ae 5 Es COM DM NW 2 5524 ERA CAS VULP Oir UE x SASA D 22 M s dE Pe 5 Ph 32 8 nee INE FRA eae 5 RES SOR AS Qn ae VD P ees ee ee mine D Y M ore Re BESS
9. ge PST OE ET GILT dA UAE ATUS mi DEO ERE Te AAS I RR MA RN Ne M ex E NA e ere erus NE ig CELA 3 fgg OSes CIMA GU SERS AVES SNS Twv RAS EN HIHI E ES Eie UNE SSE SOS RS es AES SN EE SEE AER A enn Em ge SS cafe Vu TEE TR SB Pe esas SEE fep TONS PE E P geo I Se Uem UP MIS EE ENSE S RT Achsen Xe A or COREE Eu Misc LT SO SIF ve SEE MONS SENS NT M ARE SA SOREN POA ae ren PES CCE MERE RATER WT Lf AO EE EC EEE MI E TY LII X A E AEE GNE NUN uS PARC INT iu Viene qe et eT V suis SSM ee et NUSA SNR Hn CE ett AR AMEN n I EL RU Pero RECO ut 3 Me inust Wie REGES SIG NV S VERRE SRE LE CEE RAS ee TE EE Rr UU DD M NUT E e PARAR RM T MUERE UR EE I ADAE PD ET RE T QI TU Aa SE e eg t ee NI CM SOR MYDACA T ERT Dis AE erue A DA gh DR DA MA SR me Le ee ne TPE
10. B SRA 400 STEREO POWER AMPLIFER SOUND SYSTEM CONNECTIONS DEUM oorr Ec EM MEE pocta smtp rper en PANAL nna 5 5 EE RES Entente 4 LAA MERA CORONER EEE D ATEN A MPG 5 1 9 PEE 5 ED ARS PERTE Sc er EE RARES FRERE n AGERE A eH RARES MUN NRE ADAN I 225546 TNR AU TIU MART Eua NE AME VERSA ERR de 2 NN AA QU SA DU desc 521 Z P a 53 HEUS Tut 3 E 3 2 5 ab MR Ye sy he 5 Ue E E WU Rei AL M RSS A IU v BETA QU 59 4 VS RES VD ES 5 UM 2 Dre x E LATI Gite an 3 i 3 SENTO RAE SES UAI SEEN 15 UIN gt lt x 22 RTS ee CURA PN INO Uim ied Hes RE ARR RUND AERA RSS Sno pti CN Des SEE SSE 5 NES 52 NODE E NR QD Z SHEE Race 592 5 Pr BASS PARA ARS p x v Res DSR RI 5053
11. UMS 3 a DET ua DENIS TEM ACERO PASEOS NR Diu DG CSV exe eii RE EN MI ED E ESS OL c Poor ei x dre PRO 3 Win T SRE Re TM BALERS SNRs N ESE P DIES ES 5 D e VIDERES REESE PX H r GET gt 7 Y Xi JUN UN EET TM CE Tuy Ses 2 ND DIEM x Qd T Ve ARTES Tg res SAMA lt IY EXER e DU DORUM UMEN IR ERN us TUE M RES Baas M UIT EAS EUR ETT PINS Ee VU EAD IE DAD MOORE GERE 2 ee i fW NAMEN Deuter Sk is 2 OD CONTR 2 rr SAN BUS VATES S NS M V Du Mage has l ag Stele D e VIEN du we top Neu Nri Na AE mn LE posted i i IE EE MESZ 2 MEER Hed REA Paes 2 E VEMM S INN Uu gun ut sre ES E they ORDERED MK EE FES EE EE
12. onder MADE IN U S A fe Pese pan ee C iN adi git dis 2 Poeno forest 1 Tj ee Bb lvi P Professional Sound Reinforcement Amplifier Waska e SB CH 2 12 t Y Miner RR SP rain 47 ep 1 24 E 55 28 58 Brow n GAIN Yo vy Med OPERATION INSTRUCTION MANUAL MANUAL NO 017386 WARNING TO REDUCE THE RISK OF FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE COPYRIGHT 1979 CBS MUSICAL INSTRUMENTS A DIVISION OF CBS INC LITHO U S A SRA 400 STEREO POWER AMPLIFIER OPERATION INSTRUCTION MANUAL BY MADE IN U S A 38 BELOW RATED PHYSICAL DIMENSIONS APPROXIMATE FOR SHIPPING PURPOSES U S System Metric System Weight 43 pounds 19 5 kg Width 19 inches 48 3 Depth 17 3 inches 44 0 cm Height 5 25 inches 13 3 cm P O BOX 4137 1300 EAST VALENCIA DRIVE FULLERTON CALIFORNIA 92634 NOTE See accompanying limited warranty folder at Introduction SECTION 1 SRA 400 FRONT PANEL Circuit Breaker Power Switch Power Output Displays TABLE OF CONTENTS SRA 400 REAR PANEL Channel 1 Input Channel 2 Input Channel 1 Output Channel 2 Output Channel 1 Output Fuse Channel 2 Output Fuse Mode Switch PAGE PAGE ma kta EEEN Sr s ee rere IV
13. SURE LA efe UE optaret te A NAT uS SYR Ee Vi e rr UN ID AI AN ERO EE E RAD MEE RE ERE PEDES EE E T 5 iets k 58 Uy AP RER AUTRE EEE VASA E VECES rum gt RET Ls ARE ES i re NS MEX PERRA oats rer bei NEN ue t ur Fao Vet et eee ten Rn LIN EE pA et NA ee tes AE AME PCT EE ET RS SE REE Ma Ere TR Re EUR EA path cole epee te eae AS ER MEAN RON A gt TUS Mone ee ne th end p NM SE VS EXE i ens Sv S Doni M RU SASS EK RS E EM RED NX eU Ne tetti a an wer oe NEED SEs SNI YS a ES DEREN Sones Bey Se X AES Ws Deus 2 CESSARE DU VL nd T e WELL EDS 4 248 MERE QE RA z WEM er QU Ea ree T pu ta Rr UNDIQUE QE ADAMS XV IAEA SO SEES SS ve 2 es ES E m ON MN E Sum iu PN 2 INP gl c MM ss NSS SE
14. 2 AS 2 p HS ES Me SSeS 2 NEG RAE E M AE E S TEMES IU EURE SH A D ARTS 28 Ae Ee ce m i a Mm MID A TE RL RE UE u Og nes C MES IAS LR A UE NN ug MEME ed DER SHENI aun asss emp DEL gu m e di 7 s MERE ux S ve Va PSSA oe 99 e RO TEES EN n Y 2 x PASSER 2 d AIAX UID VE 5 4 v AE NET SD M a a AV IET x gt 5 ees ME EIE NES COE DE DAN X 3 d uA SEE aa ous E ue PUDE SS DAN CA MISERE e RU ERR INN II T HS 3 z EE AA E TVA s TO OT D AED rer 5 t Y M EM ER CLE MEME M MM n IM DM RS eei CR M EM NN MER RM RE UA EAE QUEM ERA KR AR KA EE RR ITO HAS ROSES NE d AUREIS ANG AUR E ER ESTEE ERO DICAS MUI SE IR EE SAL aR SR eae 52 ON r
15. SECTION SETTING UP THE SYSTEM 3 Rr ee ee 1 Sound System Connections 9 Input Attenuators Vt l S b Se 1 Rack Mounting Instructions 3 town cara 1 Speaker Connection 3 PLE eed 1 Stereo Program Connection 3 Monophonic Connection 4 1 Monophonic Monitor Connection 4 1 Stereo Bi amplified Connections 4 1 Monophonic Bi amplified Connection 4 1 Bridged Output Connection 4 2 SECTION III DEAE 2 Sound System Connections 5 8 T 2 Preliminary Operating Sequence 8 ro 2 SRA 400 General Specifications 9 Fan FIGURE 1 O O LIST OF FIGURES DESCRIPTION PAGE Front ranell FUNCIONS ioe De a dae ntt COHEN EA 1 Hear Panel Connecions ede e 2 Typical Stereo Program Connection 5 Two Channel Output from Single Source Mono 5 Monophonic Program Monitor Connection 6 Stereo Bi amplified connection 1 6 Stereo Bi amplified Connection 2 MN 7 Mono
16. TOUT SAE Ie CA UE CEE SS A ED EE bees MER SE TQ ES See Se ME ee Ais Ba PRL v eer X e EI a ne es SESA IE a ARR A VULNUS eR e Ee 2 UPS ANA BOS wet ER em mme RIT Au EE uhu FIGURE 8 Monophonic Bi amplified Connection SECTION SRA 400 STEREO POWER AMPLIFER SOUND SYSTEM CONNECTIONS FIGURE 9 Bridged Output Connection RELIMINARY OPERATING SEQUENCE Connect the sound system required for your 4 Turn the power switch on Fig 1 2 The specific application See Sound System Connec switch s internal lamp will light up and the fan will tions begin to operate 2 Plug in line cord of the SRA 400 Do NOT remove 5 Set both input attenuators to O VU CAL or as the grounding prong on the AC plug it prevents required for your sound system hum and possible shock If necessary use three prong to two prong adapter 6 Adjust mixer output until a suitable listening level is achieved or until the red LEDs on the SRA 400 3 Turn on the sound system s mixer and any other bar graph displays begin to flicker equipment BEFORE turning on the SRA 400 This will prevent possible speaker damage caused by transients from the other equipment SRA 400 GENERAL SPECIFICATIONS 40 Load 80 Load Output power cont
17. functions of the various controls and jacks and the use of the SHA 400 in a professional sound system BEFORE ATTEMPTING TO USE THE UNIT FAMILIARIZE YOURSELF WITH THE INFORMATION CONTAINED IN THIS MANUAL SECTION I SRA 400 FRONT AND REAR PANELS SRA 400 FRONT PANEL Input Attenuators Fig 1 Item 1 Each of these two calibrated stepped input at tenuators lowers the input signal level to its respec tive channel ahead of amplification stages The gain of the amplifier is indicated in dBV The O VU CAL position indicates the calibrated setting at which O VU 1 23 volts RMS will drive the amplifier to full power CIRCUIT BREAKER POWER SWITCH Fig 1 Item 2 This combination Circuit Breaker Power Switch con trols AC power to the SRA 400 unit The internal lamp glows green when the power is turned on The circuit breaker will shut off AC power in the event of amplifier overload POWER OUTPUT DISPLAYS Fig 1 Item 3 The ten segment LED bar graph displays indicate power delivered to the load for each channel These electronic displays respond quicker than ordinary mechanical VU meters and thus allow accurate monitoring of program peaks The displays are brated to indicate decibels below rated power 200 watts into 4 ohms 100 watts into 8 ohms The dis plays are color coded with the red LED indicating full power SRA 400 REAR PANEL CHANNEL 1 INPUT Fig 2 Item 1 CHANNEL 2 INPUT Fig 2 Item 2 T
18. N ENDS SESS OE ERE Sus Seas AN EA 5 D ERES T Pp MMC E Id Ud DA RU RN Ne E DI 5 2 TS SMS x AE DNUS 5 m 5 V SONO AE FOU 3 I i z gt 5 5 2 S WU 3 x Mu TONERS id SUN N DIT C z i eae 2 MEAS TRU j gt 5 d VEN ORs es ROS it Qux ue NP SEN UM RENS pM 5 FE YEN EQUES IWAN EIE M gt ng 2 A us i MUSS RM AN S AD reet Tri VNDE ME MAS A AMA x SUUS Z E z FES SE SR z Ts 23 MENU z R F Reta RS PANNE RE PAR ESS dA Vu deep t 55 SSRN See yi ee COS ui RORY e CENA PAS DRE SEN ER DM NS IT ADT ENT RUD MANSUS NN REN 555255400 AME 5 NS Sum MAS AE E CADENA Q sa Ms SA See ae Sse
19. amplifier The input is applied to channel 1 and the input of channel 2 should NOT be used The gain is controlled by the channel 1 input at tenuator The load is connected across the red banana terminals Minimum load is 8 ohms Opera tion into smaller loads will trigger the protective cir cuitry and cause the amplifier to shut off FAN Fig 2 Item 8 This fan cools the tunnel heatsink and power transis tors of the SRA 400 while in operation To insure adequate airflow be sure that the fan opening Is not blocked during operation An internal thermostat au tomatically switches the fan to high speed when the heatsink temperature rises above 60 C 140 F V OF ELECTRICAL cni SHOCK DO NOT CAUTION TO REDUCHI REMOVE COVERS 5 m THE RISK OF FIRE REPLACE J NO USER SERVICE ONLY WITH SAME TYPE ABLE PARTS INSIDE SRIOGEO 6A 250 REFER SERVICING TO QUALIFIED SERVICE PERSONNEL FOR BRIDGED OPERATION 5r SET MODE SWITCH TO 1 BRIDGED USE t INPUT CONNECT LOAD ACROSS RED OUTPUT TERMINALS FIGURE 2 Rear Panel 2 SECTION Il SETTING UP THE SYSTEM SOUND SYSTEM CONNECTIONS The SRA 400 is a stereo two channel amplifier and special care must be taken in setting it up The unit contains two channels of power amplification and offers some special connections which may be ad vantageous under certain conditions The normal set up and some of the special connections are de taile
20. bi amplified sound systems to realize these advantages This diagram shows the left and right program mixes fed to a two channel electronic crossover where each channel is frequency divided into low frequencies and high frequencies The left program channel s low frequency material is fed to the SRA 400 channel 1 input while the left program channel s high frequency material is fed to the 400 channel 2 input The SRA 400 channel 1 output is connected to the high frequency driver tweeter of the left bi amplified speaker The SRA 400 channel 2 output is connected to the low frequency driver woofer of the left bi amplified speaker Similarly the right program channel s material is processed and eventually amplified by an additional stereo power amplifier and fed to a right bi amplified speaker STEREO BI AMPLIFIED CONNECTION 2 Fig 7 This diagram shows a second bi amplified scheme that is widely used In this stereo system one power amplifier is used to amplify only the highs and another amplifier to process the lows most popu lar music low frequency material contains con siderably more energy than high frequency material and most sound reinforcement speaker systems have high frequency drivers which have greater ef ficiencies than their associated low frequency driv ers As a result the power amplifier chosen to amplify the high frequency material need NOT be as power ful as the one chosen to amplify the low frequenc
21. d in this section RACK MOUNTING FOR SRA 400 The SRA 400 can be used as a stand alone unit or if preferred can be mounted with other equipment in a standard 19 48 3cm rack If rack mounting is de sired it may be necessary to remove the plastic feet from the bottom of the amplifier Unscrew them with a phillips head screwdriver After removing the feet re install the screws into the chassis In addition to mounting the amp by its front panel it is recom mended that the rear of the amp be securely sup ported in the rack For installation in portable racks rear support is mandatory SPEAKER CONNECTION Each output channel of the SRA 400 is designed for a minimum total load impedance of 4 ohms If the total impedance of the speakers on either channel output is less than 4 ohms the amplifier will be overloaded and cause the corresponding channels speaker fuse to blow For example at high volume overload might occur if two 4 ohm speakers were plugged into one channel s pair of output jacks a parallel connec tion resulting in a load impedance of 2 ohms Con nect the speakers to the power amplifer using 18 AWG or larger unshielded wire Zip Cord is suitable for this purpose For long runs of speaker cable over 25 feet 16 AWG or larger wire is recommended While use of a shielded guitar cable to connect the speakers will not damage the equipment a loss of volume or damage to the shielded cable may result Cho
22. e bpm VES home vel SASSER APR e Rl ere SENI eee I MEIN TS DEESSET nn TI SEE 5 xe E De WERE ES S Ne TUA DAT EUM EORR E RE meu WIRED LI ED EM EM EE MUS a UR un PAD Fo DAT TAE dd senda Seas iine SN le andit ned RP bee STORES Ar QUEE 7 d EAN PS RO E SEE ONE PER T PE e OS GEM RST Se PER SS tur DONC ever eur e c PUO SERE T ENDE MEE NU m i VCI gt NS NUMEN PO quoi Me Aft vus De ox D DERIT RSG DUE eg NEG QI MI ME ME NE e RU d ER i pa BREESE A Aes Be eet 2 ie LAE Ea more eue T 1 ENT Mee MIENNE SP SE PEE PORES DAA at ORES OMS DELI asec 2 in ec ne HMM 3 uu eri TUR It FIR RENAL EET DE 3 RT RS EAT Ss CRS ES EE PANNE EN y Les a re i
23. hese phone jacks on each channel are unbalanced and are used to connect an external signal such as that from the output of a mixer to the respective power amplifier channel CHANNEL 1 OUTPUT Fig 2 Item 3 CHANNEL 2 OUTPUT Fig 2 Item 4 For operator convenience a standard phone jack and a banana jack wired in parallel are provided as output connectors for each channel They are used to connect each speaker enclosure to its respective channel The total impedance of the speaker in each channel should not be less than 4 ohms FIGURE 1 Front Panel CHANNEL 1 OUTPUT FUSE Fig 2 Item 5 CHANNEL 2 OUTPUT FUSE Fig 2 Item 6 These fuses are connected in series with their re spective speaker jacks They protect the speakers In the event of amplifier failure and prevent damage to the amplifier caused by driving low impedance loads Each fuse is rated at 6 amperes 250 volts and should be replaced only with one of the same rating and type Littlefuse catalog number 312006 or equivalent MODE SWITCH Fig 2 Item 7 This switch selects one of the following amplifier modes of operation Stereo Normal dual channel operation Mono Connects the inputs of both channels to gether In this mode a signal input to channel 11 also CAUTION input to channel 2 This mode eliminates the use of a Y cord in monophonic sound applications Bridged Converts the SRA 400 into a single chan nel 400 watt
24. ie ao ani 3 RES EC LES ANT RENE cese EERE RES rm ees PAR OR AR SE NS M TRY RER SR RAE STR ER OT Te PRO NEE LS A Sebi ate NT i 2 gt coh EN A pA Dau Mac cd d MN uM M We wie ONS D DIM MN D WM A E UR C C S ERE E CERES E Ca RENS T uS A E xc d I IM cq n XR UM tL Se 25 LORD NA RE MAE MH ARE u TAI UM M GM AM RUPEE RR ADDE SERE U ADAM Dur ee Mia M M M E RED RL Ed 620 5 HUM OSE Ee SEE A RS el 5 PUMA ARIS YI MARS EDU SRSA z XE VAS ESOS RISE 5 Wu Ege Sd Rum CM up M d mo c M M M du c Kl pcc A ml M A T E 5 SSE SARTRE SESE ag OM E EON RIA eee MIM SII takes SLOTS EE OD IEE SEEGER ELE EEE Bes RE SP EE PR O OTTS A RS the TOR agin Seung eed oe WERTE EER Se s FR oe eases MM D S a Seat igo iene M EE NS RE RARE ERE VSS MS eS BR cco Ae RIE es AET m MERI on A D DI E deerat D ete DUET NM
25. inuous per channel with no more than 09 THD Mono or Stereo mode 200 W 100 W Output power Bridged mode continuous with no not more than 18 THD recommended 400 W Damping Factor at 50 Hz 65 130 Dynamic Headroom 1 9 dB 2 9 dB Intermodulation Distortion eee Scr T Total Harmonic Distortion 09 Transient Intermodulation Distortion ooo OD sa Bandwidth 20 20 000 Hz 0 0 4 dB 10 60 000 Hz 0 3 0 dB Slew Rate 4O VUS is Input Sensitivity for Rated 25 up sus Power Requirements 120 VAC 50 60 Hz 860 W Input impedance Stereo EEE EE EEE E Mono 16KQ Bridged N A 32KQ 3 18 kHz square wave filtered at 100 kHz mixed with 15 kHz sine wave in a 4 1 ratio SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 9 sow Vs 72700 us fe 4 Ge CCOMPANYING LIMITED MADE IN U S A P O BOX 4137 e 1300 EAST VALENCIA DRIVE e FULLERTON CALIFORNIA 92634
26. ose only high quality 1 4 phone or banana plugs and check the cables for possible short circuits an internal short circuit or a cracked phone plug in sulator might blow a fuse in the power amplifer STEREO PROGRAM CONNECTION Fig 3 The conventional stereo program system set up 1 illustrated in Figure 3 In this connection the program outputs of a conventional stereo mixer are fed to the corresponding channel inputs of the SRA 400 Channel outputs of the SRA 400 are then connected to their corresponding speakers MONOPHONIC CONNECTION Fig 4 This shows how a monophonic signal source such as one program channel of a mixer can be used to drive both channels of the 400 power amplifier in monophonic mode Set mode switch to mono Con nect the monophonic signal source to channel 1 input Both channels will be driven by the input of channel 1 MONOPHONIC MONITOR CONNECTION Fig 5 This diagram shows that if stereo program output is not necessary one channel of power amplification in the SRA 400 may be allocated to the program mate rial and the other to the monitor material In the case illustrated channel 1 has been allocated to the pro gram material and channel 2 has been assigned to the monitor material STEREO BI AMPLIFIED CONNECTION Fig 6 A bi amplified system can provide increased head room efficiency damping factor and decreased distortion The SRA 400 power amplifier can be in corporated in
27. phonic Bi amplified Connection 7 Bridged Output Cons clo uvas un dex Cata aea 8 INTRODUCTION The SRA 4001 200 watts per channel solid state stereo power amplifier designed for sound reinforcement application It is designed for standard 19 rack mounting and ruggedly constructed to withstand the physical abuse encountered in road travel ten segment fast acting LED bar graph display indicates output power delivered to the load for each channel The SRA 400 incorporates detented input attenuators with 22 steps calibrated to indicate amplifier gain in dBV These input attenuators allow for predictable and repeatable set ups accurate input sensitivity adjustments and precise channel tracking Each channel employs fully complementary circuitry throughout Sixteen 250 watt power transistors are mounted on a massive tunnel heatsink with over 6000 square centimeters of cooling surface A two speed thermally switched fan forces air from the rear of the unit through the tunnel and out the front panel A mode switch allows the operator to easily select stereo mono or bridged modes of operation The SRA 400 features protective circuitry such as fast action speaker fuses power supply fuses primary electromagnetic circuit breaker over temperature sensing and output transistor commutating diodes making it practically abuse proof The following pages of this manual detail the
28. y material In the system shown in Figure 7 the SRA 400 was chosen as the low frequency amplifier MONOPHONIC BI AMPLIFIED CONNECTION Fig 8 This diagram shows how the SRA 400 can also be used independently as a monophonic bi amplified system BRIDGED OUTPUT CONNECTION Fig 9 This diagram shows how the SRA 400 can be used as a 400 watts single channel amplifier Set mode switch to BRIDGED Connect input to channel 1 Leave channel 2 input unused Connect 8 load across red banana jacks Use of smaller loads will cause protective circuitry to shut off amplifier SECTION SRA 400 STEREO POWER AMPLIFIER SOUND SYSTEM CONNECTIONS FIGURE 3 Typical Stereo Program Connection FIGURE 4 Two Channel Output From Single Source Monophonic SRA 400 STEREO POWER SOUND SYSTEM CONNECTIONS 82 A AET OS EAT T 55 d 5 Mince SUGAR LU d TIUS SEAR LM MR DS es ae ei SERRES Y PARTIR 5 PED ANI TE c 2 MER cere APUD RS EC 3 E M EM 55 TARY eet Ra ig 222 AP HER SES STE ED ARE AES TESS SESE Ex PSS Sasu DAS Tesh LOSS PT Ra hens latinas DER ge aay ate SEN SAN MT RU
Download Pdf Manuals
Related Search