Daddy_ Posted March 12, 2017 Report Share Posted March 12, 2017 I was looking to get a JL Audio HD 1200 but was looking at the pictures and say that there is a infrasonic filter which you can have it off or on and if its on it says on the amp anything below 30hertz wont play. I wanted to set this filter to 27-28hertz. Should I turn it on and have it set to 30hertz or leave it off? Next is the low pass filter which is called filter freq (HZ) I think im good with this one but wanna make sure I can set it to 80Hz. Lastly, there is a filer mode switch that says OFF/HP/LP. What is this for? If I cant set the subsonic and low pass filter I might just get the JL Audio 1200/v3 which has these settings. Only wanted the HD because its a small amp. I have the pictures below. Top one will be the HD1200 and the bottom will be the 1200/v3 Car: 2012 Acura TL Elite Head Unit: JL Audio Fix86 Front Stage : Alpine SPX-17PRO Rear Stage : Alpine SPR-60C Component Amp : JL Audio HD 600/4 Sub : 1 12" JL Audio W7 Sub Amp : JL Audio HD 1200 Link to comment Share on other sites More sharing options...
06RTCharger Posted March 12, 2017 Report Share Posted March 12, 2017 Only info i can help with is the filter mode, off is like bandpass/allpass. Means your using no filters, all frequencies are going thru the output side. You only set it to off if ur doing ur settings/filters on ur headunit or with a processor. HP is high pass, LP low pass. Link to comment Share on other sites More sharing options...
Daddy_ Posted March 12, 2017 Author Report Share Posted March 12, 2017 So if you flip the switch to hf or lp filter mode how do you set it? Car: 2012 Acura TL Elite Head Unit: JL Audio Fix86 Front Stage : Alpine SPX-17PRO Rear Stage : Alpine SPR-60C Component Amp : JL Audio HD 600/4 Sub : 1 12" JL Audio W7 Sub Amp : JL Audio HD 1200 Link to comment Share on other sites More sharing options...
06RTCharger Posted March 12, 2017 Report Share Posted March 12, 2017 Use the dial that has 50-60-80-250-500. But you definatly should use a SMD CC-1, to be precise and safe. Link to comment Share on other sites More sharing options...
Daddy_ Posted March 12, 2017 Author Report Share Posted March 12, 2017 So say you wanna set the HF you put it on HF and set it with the dail and then does it save or something before you switch it to LF? Car: 2012 Acura TL Elite Head Unit: JL Audio Fix86 Front Stage : Alpine SPX-17PRO Rear Stage : Alpine SPR-60C Component Amp : JL Audio HD 600/4 Sub : 1 12" JL Audio W7 Sub Amp : JL Audio HD 1200 Link to comment Share on other sites More sharing options...
06RTCharger Posted March 12, 2017 Report Share Posted March 12, 2017 No, i beleive its one or the other. I meant to edit my first comment about "bandpass". Band pass is not the same as allpass/fullpass/off. Band pass is what you are now asking about tho, bandpass will let u set a cut off point at a high point and a low point, like for midrages. For example a 6.5inch mid, maybe u cut the lowend off at 120hz and the highend off at 2,500hz. To do that on a amp you would need the "bandpass" option on the amp. For sub amps all you need is the LP lowpass, maybe subsonic filter. For highs just the HP highpass. The amps in ur pics i believe are mostly for subs, theyre mono amps. So theres no need for setting a HP, just us the LP. If u want, u can turn on that subsonic and that sorta in a way becomes a HP, because it will cut off lows. Link to comment Share on other sites More sharing options...
06RTCharger Posted March 12, 2017 Report Share Posted March 12, 2017 I guess most the JL amps are made to be used in a passive setup or with a processing being done before the amp? Couldnt find many JL amps with bandpass. Just the XD700/5 so far. Link to comment Share on other sites More sharing options...
Daddy_ Posted March 12, 2017 Author Report Share Posted March 12, 2017 So I can switch the filter more to LP and have it set to 80Hz and then if I eant have the infrasonic filter on or off. If I have it on nothing below 30Hz will play. Is that right?? Car: 2012 Acura TL Elite Head Unit: JL Audio Fix86 Front Stage : Alpine SPX-17PRO Rear Stage : Alpine SPR-60C Component Amp : JL Audio HD 600/4 Sub : 1 12" JL Audio W7 Sub Amp : JL Audio HD 1200 Link to comment Share on other sites More sharing options...
06RTCharger Posted March 12, 2017 Report Share Posted March 12, 2017 Yah. If thats how that "infrasonic" switch works. Ive Never heard it called that before, usually its just called a subsonic filter. Im guessing its the same tho. Link to comment Share on other sites More sharing options...
JeremyN Posted March 14, 2017 Report Share Posted March 14, 2017 the spot on the amp that says full/HP/LP is the preamp output section for connecting additional amps to it as set the preamp out put to HP and set the cross over in that section to about 100 HZ and you use that as a cross over for the mids/hi amp 2 12" Jeff Vue Customs 1 set MB Quart FSB 216 in doors1 American Bass 100.1 on sub1 Hertz EP2 on doorsJVC deck IPOD controlStock 105 amp alt DD-1big 3new build in Chevy caviler http://www.stevemead...chevy-cavalier/last set up in the ZX2 http://www.stevemead...-current-build/old build log http://www.stevemead...-1998-ford-zx2/ Gold is the money of kings, silver is the money of gentlemen, debt is the money of slaves. Just my .02c that shop needs keep those doors open so they have to charge for it if people think 10k is a lot then they should get into other hobbies.. like masturbating, cause any hobby cost money to maintain Lol no, I'm smarter than that bro haha. Fool me once, shame on you, fool me twice..............go fuck yourself lol Link to comment Share on other sites More sharing options...
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