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JL Audio HD900/5 - page 1
OWNER’ S MANU AL 5- Channel Class- D S ystem Ampli fier Th ank y ou for purcha sing a J L Audio amplif ier for your automot ive soun d sys tem . Y our amplif ier ha s bee n d esig ned and m anufac tured to ex ac ting stan dard s in order to en sure years of mu sic al e njoyme nt in your vehicle . For m ax imum pe r form ance , we h ighly re comme ...
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JL Audio HD900/5 - page 2
2 | JL Audio - HD900/5 Owner ’ s Manual PROTE CT YOUR HEA RING ! W e value yo u as a lo ng- term cu st omer . Fo r t hat re ason, we u rge you to pr act ice rest ra int i n t he ope ration of t hi s produc t s o as not to da mage your hearing and that of o thers in your ve hicle. St udie s have shown th at cont inuous ex posu re to high sound pr ...
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JL Audio HD900/5 - page 3
3 Cooling Ef ficienc y Considerations: Y our JL Audio amplifier emp loys an adv anc ed t y pe of heat man agement , ca l led RealSin k ™ . Th is feature takes advantage of conv ec tion and radiation effects to rem ove heat from t he a mpli fie r ci rcu itr y . For opt imu m cooling performance, the vertica l heat sinks located at the sides o f th ...
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JL Audio HD900/5 - page 4
4 | JL Audio - HD900/5 Owner ’ s Manual PRODUCT DE SCRIPTION The JL Au dio HD90 0/ 5 is a very pow er ful and com pact f iv e-cha nnel amplif ier util izing patent ed Si ngle Cycle Cont rol ™ C las s D technolo g y for a ll channels. This g r oundbr e aki ng technolog y delivers referen ce-gr ade, fu ll- range sonic performance while requiri ng ...
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JL Audio HD900/5 - page 5
5 TYPICAL INST ALLA TION SEQUENCE The follo w ing rep resen ts the sequen ce for a ty pi ca l amplif ier insta llation, using an a fte rma rket sou rce u nit or OEM Inter fac e processor (like the CleanSweep ® CL 441 dsp ). Additio nal steps and dif fe ren t pr ocedures ma y be required in some ap plications. If you ha ve any questio ns, please co ...
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JL Audio HD900/5 - page 6
6 | JL Audio - HD900/5 Owner ’ s Manual POWER AND TURN ON CONNECTIONS Befor e i nstall ing the amplif i er , disconnect t he nega tive (ground ) wire from the vehicl e’ s battery . This wi ll pr even t acci dental damage to t he system, t he veh icle a nd y our b ody duri ng i nst a llat ion. + 1 2V Batter y Connection Y ou w i ll need to co ...
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JL Audio HD900/5 - page 7
7 For opti ma l grou nding , we recom mend t he use of a JL Au dio ECS m aster g round lug (XB-MG LU) . Alter natively, a sheet met al scr ew o r bol t can be used with a star wash er . Many vehi cles em plo y sm all ( 10 A W G - 6 A W G) wire t o gro u n d the battery t o the v ehicl e chassis and t o conne ct the altern at or’ s posi tive conn ...
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JL Audio HD900/5 - page 8
8 | JL Audio - HD900/5 Owner ’ s Manual AMPLIFIER MOUNTING OPTIONS The HD90 0/ 5 has two moun ti ng o ptions to ease in inst allation. Standard Mounting Th e st and ard met hod of mount ing requ ires remo va l of the fo u r corner caps wit h t h e 4 mm hex wre nch i ncluded wit h your a mpl if ier. Usin g appropr iate mount ing screw s (not i ncl ...
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JL Audio HD900/5 - page 9
9 AMPLIF IER INPUTS The HD900/ 5 has three se parate in put se ctions, one for th e “Front” lef t a nd r ight cha nnel s, another for the “R ear” l eft and righ t ch annels and o ne fo r the Su bw oof er Channel. Ea ch sectio n cons ists of a pair o f R CA- t ype inp ut jacks o n the Conn ec ti on Panel o f the amp lif ie r and in put con t ...
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JL Audio HD900/5 - page 10
10 | JL Audio - HD900/5 Owner ’ s Manual The output of the a m plif ier decreases for a given input vo ltage when the “Input Ra nge” sw itch i s pla ced in t he “Hig h” position. The outpu t increas es with t he sw it ch in t he “Low” pos ition. Wh ile thi s may sound counte r- int uiti ve, it is cor rec t as des crib ed. CHANNEL CONT ...
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JL Audio HD900/5 - page 11
11 wh ile the “Su b” ch a nn el fi l ter is a lo w- pass fi l ter ( attenuates high f req uencies ). F or each f ilter , the user can select from a shallow ( 12dB/ oc tav e ) f ilter slop e or a more a gg ressi ve (24d B/ o ct ave ) slope. 1) “ Hig h-Pa ss Fi lter ” Cont rols (Front a nd Re ar cha nne ls ) or “ Low-P ass Filte r ” Contr ...
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JL Audio HD900/5 - page 12
12 | JL Audio - HD900/5 Owner ’ s Manual BI AMPLIF IED SYSTE MS Bi-a mpli fi ed s yste ms a re de fi ned as s yste ms in wh ich se par ate a mpl if ier c han nels dr ive low- frequen cy (LF) and high-freque ncy (HF) spea kers and are separately filtered to sen d app ropriate f requenc y r ange s to each spea ker sy stem. Th e most com mon appl ...
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JL Audio HD900/5 - page 13
13 REMOTE LEVE L CONTROL OPTIONAL Wit h t he ad dit ion of the option al Remote Leve l Cont rol (H D-R LC), you ca n c ontrol the level of the Subw oofer Channel of the HD900/5 from the front of the vehi cle. The HD-RLC connects to t he jack label ed “Remot e Le vel C ontrol ” on t he C onnec tion Pane l of t he ampl if ier usi ng a stand ...
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JL Audio HD900/5 - page 14
14 | JL Audio - HD900/5 Owner ’ s Manual BRIDGING CONS IDERA TIONS Bridging is the practice of co mbining the outpu t of two amplif ier channels to drive a single load. When b ridged, each channel pr oduces signals of equal magn i tude, but o pposi te polarity . The comb i ned o utput o f the two channels pro v ides t wice the ou t pu t voltage a ...
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JL Audio HD900/5 - page 15
15 “ST A TUS” LED / PROTECTION CIRCUITRY There is a single multi-col or LED on the cont rol pa nel of t he a mpli fie r to ind icate the a mpli fier ’ s o perat ing st atus . T his LE D’ s b ehav ior is as fo llows: 1) Flashi ng Green : a mpli f ier i s power ing up, aud io out put is muted. 2) C onsta nt Gre en : ampl if ier i s on and f u ...
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JL Audio HD900/5 - page 16
16 | JL Audio - HD900/5 Owner ’ s Manual SERVICING Y OUR JL A UDIO AMPLIFIER If your amplifier fai ls or malf unctions, please return it to yo u r authorized JL Audio dea l er so that it ma y be sent in to JL Audio for ser vice. There are no user serv i ceable par ts or fu ses inside the am plif i er . The unique nature of the circuitry in the JL ...
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JL Audio HD900/5 - page 17
17 APPEN DIX A: HD900/ 5 Specifications Amplifier T op ology: Clas s D , switch ing type with paten ted Sing le- C ycle Con trol™ t echnology. Pow er Supply: Pu lse widt h modulat ion-regula ted switching p ower supply Recommended F use Va lue / T ype: 60A (A FS, AG U or Ma xi Fus e™) Rated Power (Main Channel s / Ste reo ): 1 00 W RMS x 4 @ 4? ...
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JL Audio HD900/5 - page 18
18 | JL Audio - HD900/5 Owner ’ s Manual APP ENDIX B: Precise F requency Sele ction Chart “FIL TER FREQ” Detent Panel Actual Number Marking Freq . (H z) Full counter-clockwise: 53 01 ........... “50” ............ 53 02 ............................ 53 03 ............................ 53 04 ............................ 53 05 ................ ...
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JL Audio HD900/5 - page 19
19 The Nine-Step Proc edure (follow t h is pro cedu re for e ach pai r of cha nnel s ) 1) Di scon nec t t he Spe ak er C onnec tor Plu gs. 2) T u rn off al l processing on the so urce unit (bass/ trebl e, lo udness, EQ, etc. ). Set fade r con trol to center pos ition and subw oofe r leve l cont rol to 3/ 4 of ma x imu m ( i f us ed to dr ive t he H ...
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JL Audio HD900/5 - page 20
20 | JL Audio - HD900/5 Owner ’ s Manual “How do I pro perly set the in put s ensitiv ity on my amplifier” Plea se r efer t o Appen d ix C (p ages 1 8, 19 ) to set the inpu t sensitivit y for m ax imu m, l ow -d istor t ion out put. “My ampl ifi er do esn’t tur n on” Che ck the fuse( s) , not j ust visua lly , but with a con t inuity me ...
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JL Audio HD900/5 - page 21
21 “My amplifier sh uts off once in a wh ile, usuall y at higher v olumes” Che ck y our vo ltage sour ce and grounding point. The po wer supp ly of the HD900/5 w ill operate wit h charg ing system vol tages down to 9 V . Shutd own pr oble ms at hig h er vo lume lev els can occu r whe n the chargi ng system vol tage drops bel ow 9V . These dips ...
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JL Audio HD900/5 - page 22
22 | JL Audio - HD900/5 Owner ’ s Manual INSTALLA TI ON NOTES: Use this diagram to document your amplifier ’ s switch and control positions. ...
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JL Audio HD900/5 - page 23
23 ...
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JL Audio HD900/5 - page 24
LIMIT ED WA RR A NTY A MPL IFIERS US A JL A UDI O warran ts this pr oduct to be free of de fe cts in mat erials and wo rk m anship for a peri od of t wo (2 ) yea rs f rom t he or ig ina l d ate of purc hase . This wa rranty is not tr ansfe rable a n d app l ies only to the original purchaser from an au thoriz ed JL A UDIO dealer . Should ...
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