Hi Ethan,
What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.
You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.
I hope this helps & good luck!
SOURCE: Auto Sub woofer
There are several causes of distortion in an audio setup.
1) Speaker is unable to handle the frequency that it's being fed
2) The volume is too high for the speaker to handle
3) The amp can't provide enough power to drive the speaker adequately.
Either way distortion is BAD & best to be avoided unless you want an excuse to buy a new set of speakers :P
SOURCE: hooking up a sub woofer
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp
take a look there and it should give you everything you need and show you the different options for the different ohm loads. Remember... don't go below 4 ohms on those. Above is ok, below is not.
SOURCE: less bass to main speakers divert it to sub
You can buy aftermarket crossovers that will reduce or eliminate bass frequencies to some or individual speakers. They are wired in line with the speakers in question, ususally right before the speaker itself and tucked away inside the door.
SOURCE: 2002 soft-top. no bass in my speakers
this was most likely caused by a short curcuit due to the moisture, try using a test light to see if there is power, if not check the wiring
SOURCE: I've connected a powered sub (bazooka BTA10250D)
We used to use what we call bass blocker capacitors on the component speakers to block the bass coming from the head unit and to allow the bass to only come from the subs...there is several values of these capacitors that you can use(different values correlate to different frequencies). These type of capacitors are available at Radio Shack. You will need to request a NON-POLARIZED Electrolytic capacitor at a voltage rating of not less than 25 Volts...As for the value of the microfarad rating..you may need to experiment with different microfarad values to get the sound you desire...standard microfarad values are 1uF, 2.2uF, 3.3uF, 4.7uF, 10uF, 22 uF, 33uF, 47uF.
You probably won't need to go any higher on the value than those listed....in my experience, I have found the 4.7uF and 10uF to be good for most speakers...to install these...you need to put one inline with the positive lead to each component speaker.
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