I got this today: http://www.crutchfield.com/p_105KSA4302/JVC-KS-AX4302.html?search=JVC+amp i'm a car audio noob but i hooked up the amp myself and i'm proud of that even did some research on how the LPF/crossover/level/bass boost knobs work to get the best out of my sub. i just have some questions that maybe i can get answered here. depending on how far i have the knobs turned, does that make the amp work any harder? like push it faster into protect mode? i don't do a lot of long drives (mostly just around town), but before this amp i was using a cheap sony xplod 600w that had the knobs cranked all the way, and it would shut down pretty quickly (30/40 minutes). the reason i invested in this amp was to hopefully avoid constant shut offs. also, on my HU i am able to control the LPF. i have it set to off, and when I change it i can't really hear much of a difference. my question is, is there any point in using it on the HU? on the amp there is a crossover knob that i have turned 3/4 of the way, and it brings out a lot of the low notes and makes the sounds that come from the speakers sound nice and rich. would it be bad to turn it all the way up? is this basically controlling the LPF? and about the bass boost knob, i have heard different opinions on it such as to not use it at all, or to use it as it sounds good to you... right now i have it a little past half because that is what sounds good to me. what are some opinions on that?
Well, im not to sure how JVC amps are, but i can tell you your sony Xplod kept turning off because those amps get hot QUICK. Its a very common thing for those quality of amps. As far as the LPF on your amp and HU. Set it to what youd like to be on your amp, then id go to the HU and set it to around the same thing you set it to on the amp just to help clean the signal out. When it comes to bass boost and all that, just set it all to how youd like, and if the amp starts to shut off after a while, turn it down abit. GL!
I personally like the knob. I switch from hardstyle to hip hop to metal to old rock then back to hardstyle. If I didnt have it and relied on the amp settings alone some songs would have too much bass and others would be too low IMHO. Too clarify i have had them but currently cannot locate one for my amp.
I am not sure exactly where the LPF is set to on the amp, but it goes from 50hz to 400hz. Right now i think i've got it at either half or less.. i tweaked it this morning. i also had been using the bass boost but decided to not use it at all. i heard that it draws more power from the amp and that is something i don't want to do. I noticed today when I was driving around, i was working the amp for about 40 minutes or so and listening to different songs when it sounded like i was missing out on some bass in the MIDDLE of the song. that maybe even the sub was cutting out completely. like there was mid-bass coming from my speakers, and maybe i'd feel a punch or two from the sub, but it wasnt producing as much bass as before. so i changed to a more bass heavy song like some rap, and found that the bass was still there. Is this a grounding issue? I do plan to eventually ground the wire to a better spot and i am hoping this will fix it.
i had this same exact amp. whatever you do dont bridge it down to 2ohm with your sub or it will fry in a heartbeat i figured it out the hardway. it bumped good for a few then dies on me. as long as you run your sub at 4ohm youl be ok. you can get a meter i believe to set your gain correctly or you can do it by ear. guy at the audio shop said turn it up to the loudest point you will listen to it. turn your gain up till it starts to distort at your loudest lisening volume then back it down alittle till the distortion stops. hope this helps
i'm running it at 4 so i dont have that to worry about that i made sure to read the instructions twice haha
Using both LP crossovers is pointless. The reason you don't hear a difference is, if your amp is set to 80 Hz and you turn the HU crossover to 80 or above, there will be no difference because the amp has already filtered out the frequencies. Either leave the HU crossover off and adjust the amp one or set the amp to FR (full range) and use the HU crossover. If the amp doesn't over a FR setting, just turn it all the way up. The higher the crossover, the more boomy your bass will be and yes, it is putting slightly more strain on the amp, but nothing to usually worry about. Be very careful using bass boost. Every +3dB you step up, you're directing DOUBLE the power to that frequency, whatever it is. Some amps have a preset bass boost of around 45-60 Hz. So if your normal listening level requires an average of around 100 watts and you turn the bass boost to +9, you're trying to pump about 800 watts into the frequency.
