Had question about Infinity Kappa speaker install...

O.D. Showtime

Founding Member
Mar 31, 2002
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I just got my Infinity speakers installed (they're component sets) and they don't seem like they have any bass to them. I'm running them off of a 350.4 Kicker amp. My stock speakers sounded bassier. Also, the install shop used 18 gauge wire to re-wire my car for these speakers (is this a big enough gauge?).
 
about the bass, check the crossover on the amp, might be set to high. your factory was either not crossed over, or it was somewhere around 80hz. i would suggest around 80hz for those speakers (i have them in my pathfinder, and am using a 12db per octave slope at 80 hz).

on the subjest of wire, no 18awg is not big enough. you should at least have 14awg in there. your factory wiring is 16 or 18, no worse than what is in there now. i think i would complain if i was you.

BTW shop wire is usually 16 or 18 awg, good stuff is not free wire, you should buy good wire, and have them put it in.
 
1hotz said:
about the bass, check the crossover on the amp, might be set to high. your factory was either not crossed over, or it was somewhere around 80hz. i would suggest around 80hz for those speakers (i have them in my pathfinder, and am using a 12db per octave slope at 80 hz).

on the subjest of wire, no 18awg is not big enough. you should at least have 14awg in there. your factory wiring is 16 or 18, no worse than what is in there now. i think i would complain if i was you.

BTW shop wire is usually 16 or 18 awg, good stuff is not free wire, you should buy good wire, and have them put it in.


What are the negative consequences of using 18 awg wire in the car? The factory wire leading to my tweeters/speakers was much, much thinner than the stuff the installer put in. The only reason I think he used 18 awg is b/c on the receipt it says "Primary wire 25' 18 gauge red." I asked him after I dropped the car off what size wire he'd put in and he said, "...nothing too small, probably at least 14 guage." I also don't know why it says "red" on the receipt for the color of the wire, b/c the wiring is colored tan. Maybe he scanned the wrong UPC when ringing up my order. I don't know. Also, I believe I saw some "Scocshe" (sp?) products on the back wall, including what appeared to be spools of speaker wire. Is this a good brand b/c I think that's what was used.

As for the bass problems, I still don't know what you mean. I'm new to audio. I don't see how the factory couldn't have been crossed over, because I have no factory parts in my car. All factory amps and audio components, and just recently the wiring, have been removed.
 
Infinity speakers dont have alot of bass at all. I have a set of them in my garage because i tryed them and replaced them because of that reason. Did you have the amp installed at the same time? The crossover that he was talking about is on the amp. takes out the very lows. change the settings on the amp and see what it does
 
the primary wire is the power wire fron the battery. it might have been a miss print, but it was most likley 25' of 8 awg red primary wire.

anyway the problem of having 18awg wire is that it will choke down the sound. it's like running a 10awg wire to your starter, it will work, but it will get hot. if the wire installed in there is bigger than your factory it most likely is 14 or 16awg, which should be fine.

as far as the factory system not being crossed over, some are not. there is not any sort of high pass filter built into factory decks, but if you had a amplified system yours were.

the crossover i was talking about is on the amp itself. it is a knob that should have some writing along the sweep of the knob ranging from about 60 to 320. if it has 80hz marked, put the arrow on the knob there, or lower (50 at the lowest), depending on what you are looking for in sound.
 
For that wattage and distance, 24ag wire would be sufficient. The wire is fine. About the lack of bass, take off your door panel. See all those gaping holes? Cover/seal them. You can use deadening material (Dynamat, FatMat, RoadKill, etc), wood, rigid plastic, anything to isolate the rear wave of the speakers from the front. I used a combination of 3/8" hardboard (like pegboard without the holes) and then covered the whole thing with eDead in my '02. It made a night and day difference in the lowend response of my midbass drivers.
 
Okay, I set the x-over at 80 Hz for amp 1 and amp 2 on the 4-channel. I did notice increased performance in the rear speakers, but hardly anymore bass than previously. Now, more questions:

-What should I set my Input Gain at? the knob goes from 0 to 11.

-What should I set the Bass Boost knobs to? It says in the owner's manual that if you turn the bass boost up, then you need to adjust the gain control to avoid clipping the amp.

Thanks.
 
the gain on the amp is to adjust for input. it gives flexability to the decks. not all decks are made the same, and the gain, bass boost, and crossover allow you to make every input signal sound the same. i do not reccomend turning the gain up past half.

as for the bass knob turn it all the way up, then adjust the gain on the amp to just a touch above what you want out of the speakers, then turn the knob down to each style of music you listen to.

i personally do not reccomend using bass knobs. they can be a easy way for you to destroy the speakers. if everything is not setup correctly, and you crank the knob up to impress someone, you will blow your speakers.