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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JL Audio HD900/5, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of JL Audio HD900/5 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of JL Audio HD900/5. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of JL Audio HD900/5 should contain:
- informations concerning technical data of JL Audio HD900/5
- name of the manufacturer and a year of construction of the JL Audio HD900/5 item
- rules of operation, control and maintenance of the JL Audio HD900/5 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of JL Audio HD900/5 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of JL Audio HD900/5, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JL Audio service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of JL Audio HD900/5.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JL Audio HD900/5 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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Page 23
23[...]
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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 [...]