I know i saw some one post a chart that listed capaciters and resisters that u can install inline with the speaker to take out some frequencies, and make a cheap type of a cross over. Ive searched and could not find where it was, if anyone remembers or if they have what im talking about TY for posting it.

Just need it to kill some bass going to the cheaper 4x6s and 6x9s and letting the subs do the work

 

http://www.carstereo.com/help/calc_cr.cfm

 

it's capacitors and inductors, but since those speakers have a resonance peak in the vicinity of where you want to filter (especially the 4x6s), this can get very complicated. To be precise, you need to construct a series notch filter to control the impedance spike at the speaker's resonant frequency. Buying a deck with an internal high-pass filter is MUCH more precise.

But, if you want to try and gamble, you can just wire a 500ufd capacitor in series with the positive speaker wire. Just make sure you get non-polarized caps. A 500ufd cap will provide a 6dB/octave high-pass at approximately 100hz assuming the speaker has a dc resistance of approximately 3.2 ohms, and disregarding the impedance spike that is likely to cause the actual crossover frequency to be a mile off.

 

umm, i dont really study audio much at all

however, i do want to filter out the really low freq from going to my mid/high speakers that are behind the driver (sail panel speakers if it was a coupe)
i have a subwoofer, and the amps are set to "filter" out the lows from going to the speakers, but its just not effective enough.

so a 500ufd cap would act as a high pass filter and eliminate the lows?? i know i just need a cap and possibly a resistor wired in there, but i just didnt know any values....

 

You don't need a resistor. You need the cap for a 6dB attenuation, a cap and an inductor for a 12dB attenuation.

BUT... if the amp you're powering your 6x9s with already has a high pass filter, it should be more than enough to filter virtually all of the bass out of those speakers. Are you sure you've got the filter on the amp set up properly?

 

quick rundown of what i have:

my stereo stuffs got stolen when they tried to steal my car last fall. luckily i have good friends and they all donated old stereo stuff that they wernt using.


so i have a sony headunit (blah)... the RCA outs goto the first jenson amp... this is a briged 300watt amp that powers a 10" woofer.

the pass thru from that amp goes to a 200watt jenson amp that powers the 4"- 6" round(i forget) left and right speakers (convertibles dont use 6x9s)

the 1st amp passes only lows to the subwoofer..
the 2nd is set to pass only highs to the speakers... it works, but it leaves to low of a sound in.. so it sounds ok until about half volume, then it begins to try to put the bass thru the small speakers...
it does it at lower volume if some "boom-boom" music like rap or whatever is on. any hard bass hit will go thru

i just want to clean up the signal to them so they wont bottom out trying to do that.

 

it sounds to me like the high pass on the amp is set at too low of a frequency, although I'm guessing that the Jensen doesn't allow you to vary that frequency.

It's not that you need more bass taken out, it's that you need the crossover to operate at a higher frequency.

 

yup

and it IS adjustible... it just doesnt adjust enough.

i just want to cut out a lil more.... think a 500uf cap inline with the + speaker wire will do that?

 

No. The jensen probably uses a 12dB/octave slope, and if you've got it turned to the highest frequency that it'll filter, you're already attenuating the 100hz stuff a ton. You'll probably need to go to something like a 250uf cap to filter approximately 200hz and down, which is going to make your male vocals sound thin and fake.