Instruction/ maintenance manual of the product 85 Radio Shack
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Cat. No. 12-1977 OWNER’S MAN UAL Plea se read before using this eq uipment. 85 × 4 Hi g h Power 4-Channel Tru nk Mount Amplifier 12- 19 77 .f m P ag e 1 T ue s day , J ul y 1 3, 19 99 10 :07 AM.
2 FEA TURES Your Opt imus 8 5 × 4 Hi gh P ower 4- Channel Trun k Mount Am plifier is de- signed to p roduce a tot al of 340 watts to give adde d punch and pow er to your ve hicle’s ex isting ste reo sys- tem . The am plifier produces up t o 85 watts per channel of clean, powerful sound at all audio frequ encies with minimum di s tortion.
3 Mute Turn On Ci rcuit - elim in ates the irrit a ting thum p n oise that som e ampl ifiers produce when you turn them on. Power Indic a t o r - lights when power is on. Full MOSFET Po wer Supp ly - pro- duce s enough power to supply the main amplifier a nd has a conside r- able amoun t of reserve power for peak “high de mand” s ituations.
4 CONTENTS Prep arati on .... .. ... .... ..... ..... ..... .... ..... ..... .. .. ..... ..... ..... .... ..... ..... ..... .. .. ..... ..... ..... .. 5 Choosing a Mounting Locat ion .... . . ............................... . . .......................
5 PREP ARA TION CHOOSING A M OUNTING LO CA TION The ideal location for mounting the a mplifier is in you r vehicle’s trunk. Wherever you decid e to mount it, choose a mounting location that: • Doe s not interfere with the vehicle ’s o peration. • Lets you drill mounting holes without damaging othe r vehicle componen ts.
6 Cautio n s: • T o prevent damage to your amplifier or aut osound system, you must first connect th e ground, p rimary , and switched powe r wires (as descr ibed in “Connecting G round and Pri mary/Switched Po wer”) before you connect the speakers t o the amplifier .
7 2. Securely c onnec t the supplied dark blue/whit e w ire’ s spade c onnector end to the amplifier ’s REM (r e mote power) terminal. 3. Connec t the dark bl ue/white wire’s other end to y our autosound syst em’s switched power lead using a twist-on terminal conn ector (such as Cat.
8 CONNECTING T O YOUR AUTOSOUND SYSTEM Low Le vel In pu t Co nn ec ti o ns You can c o nnect yo ur autosound sy s tem’s low-l evel pho no output j acks to the amplifier’s lo w-level phono input jac k s . For the bes t results, use shielded a udio cables, such as Ca t.
9 If your autosound system has four phono output s but you are using onl y two spea kers (front or rear) , connect only the autosound system’s correspond- ing output jacks to the amplifier using audio cab les as f o llows: • front-left to CH1 and front -right to CH2 , or • re a r- l e f t to CH3 and rear-right to CH4 12- 19 77 .
10 If your autosound syst em has only two phono output jacks (left an d right) and you are using four speak ers, use two Y-ada pter audio cables to make the conn ections as follows: Note: F or the be st results, use shielded p hono p lug-to-phono plug Y- adapter audio cables, such as Cat.
11 If your autosound system has o nly two phono output jacks (left and right) and y ou are using only two speak ers, simpl y connect them to the amp lifier ’s correspond ing CH1 and CH2 , or CH3 and CH4, phono ja cks.
12 If your autosound system has f our speaker outpu ts and you are going to use four speakers: Float ing Gr ound Connection Common Gr ound Connection 12-1 977.
13 If your au tosound system h as only two spea ker outputs and you are go ing to us e four speakers : Fl oati ng G round Connection Common G round Connection 12-1 977.
14 CONNECTING THE SPEAKERS With the speakers placed i n t heir approxim ate lo cations, run one s p eaker wire from each speaker to the amplifier. We recom mend you us e 16- or 18-gauge marked or c olor-coded wires to help yo u correctly conn ect the spea kers to your amplifier.
15 Connect ing Fo ur Spea kers 1. Connec t one e nd of a speaker wire’s mark ed cond uctor to the amplifier ’s CH1 + terminal (f ront-lef t positive). 2. Connec t the unmarked con ductor ’s end to t he amplifier ’ s CH1 - ter m in a l (front-left negat ive).
16 Co nnecting T wo Spe akers ( U nbri dged Con nection ) If you are c onnecting only two speakers , you can connect them to the amplifier’s fro n t ( CH1 and CH2 ) or rear ( CH 3 and CH4 ) speaker terminals. Cautio n : This is an unbridged con nection that produces 85 wat ts per channel.
17 Con n ecting T wo Speak ers (Br idged C onnecti on) If you are connecting onl y two speakers (left and right), you can add (bridge) the power out put o f two channel s (front and back) to produce t he combin ed power of both from each of the two speakers.
18 Co nnecting T wo Un bridg ed Speake rs and One Unbr idged Subw o ofe r 1. Connect the two spea kers to th e CH1 a nd CH2 terminals (front speakers) or to the CH3 and CH4 terminals (rear spea kers).
19 Connect ing T wo Unb ridge d Speaker s and One B ridged Su bwoof er 1. Connec t the tw o speak ers to the CH1 and CH2 t erminals (fron t speakers) or to t he CH3 and CH4 t e rminals (rear speakers).
20 TESTING THE C ONNECT IONS Before y ou perman ently m ount the am pl ifier, connect y our vehi cle battery’s neg- ative ( - ) cabl e, turn your vehicle’s i gnition to ON or ACC, then test the conne c- tions.
21 MOUNT ING TH E AMPL IFIE R Before y ou begin m ounting the am plifier, make su re you have t he following sup- plied hardware necessary f or moun ting. • 6 sheet-me tal screws • 6 spring washers • 6 flat washers Then confi rm that the amplifier fits your v e hicle’s m ounting area.
22 3. Using the mounting ho les on the amplifier as a gu ide, mark th e locations for the mount ing hol es. 4. D rill 9 / 64 -inch holes in the marked locations, being caref ul not to dam age anything behin d the mounting surface. 5. Attach the a mpl ifier to t he mou nting s urf ace usin g the s upp lied s heet-met al screws and washers.
23 OPER A TION TURNING ON T HE AMPLIF IER The am plifier automatically turns on when ever you turn your vehi cle’s ignition switch to ACC or ON. POWE R lights when the amplifier is o perating. SETTI N G THE LEVEL CONT RO L For th e best performance, you can ad just the lev el of audio s ignals that enter t he ampl ifier by followin g these steps.
24 2. T emporarily turn up the autosound s ystem’s volume control t o about one- third of it s fu ll range. Cautio n : Ne v e r turn t h e le v el controls up any farther than you need to get clear sound at two thirds volume maximum . 3. T urn the le ft and right LEVEL controls clock wise u ntil you can hear the sound at a comfortable level.
25 MAIN TENANCE Your Op timus 85 × 4 High Powe r 4 -Channel Trunk Mount Am plifier is an example of superior design and c raftsmanship. The follo wing suggestions will help you care for your (pro duct nam e) so you can e njoy it for years. Keep the amplifier dry.
26 REPLACING THE FUSES If the am plifier shuts d own, you might need to repl ace t he p ower wi re’s 50-am p tube-type fuse, ei ther of the two 25-am p bl ade-t ype fu ses on the b ac k panel, or all three fus es. Cautio n s: • Do not u se a fuse with ratings other than those specified here.
27 SPEC IFI CA TIONS 10% T HD Output Power @ 1 4.4 VDC 1 kHz (4 Channel Mod e) ...................... . ....................... . .................... . ....... 85 W ¥ 4 (Bridged M ode) . ................ .. ....... .......... .. ....... ....... ....
RADIO S HACK A Divisi o n of T andy Corpor ation Fort Worth, T exa s 76102 7A5 Printed in T aiw an RADIO SHACK L IMITED W ARRANTY Thi s pr oduc t is warr ant ed a gain st def ects for 1 year fr om d ate of pur chase from Rad io Sh ac k com pa ny -o w ned st o re s an d aut ho riz ed R ad io Shac k franc h is ee s and de al ers .
An important point after buying a device Radio Shack 85 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Radio Shack 85 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Radio Shack 85 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Radio Shack 85 you will learn all the available features of the product, as well as information on its operation. The information that you get Radio Shack 85 will certainly help you make a decision on the purchase.
If you already are a holder of Radio Shack 85, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Radio Shack 85.
However, one of the most important roles played by the user manual is to help in solving problems with Radio Shack 85. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Radio Shack 85 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
