View Full Version : Crossovers
10-29-2001, 04:47 PM
i've got the DX 3065 component system with its own amp and was wondering if i install an electronic crossover before the amp, is there any need to keep the supplied passive crossovers for any reason but to split the signal between the woofers and tweeters? also, my passive crossovers are mounted 3-4" above the amp and i'm having some noise problems. could the proximity between the amp and crossovers have anything to do with this noise? the noise is a hissing sound that stops if i pause the CD or turn it off, and when the CD is switching tracks? i've got a speaker-RCA converter for the DX 3065 under my dash about a foot from the receiver. i've got another one right behind the receiver for my rear speakers (EX 572a) and have never noticed any noise coming out of them. i've also got a little engine noise. any help would be greatly appreciated.
It would depend on the type of active crossover if it is a 2, 3, 4,
or 5 way type of crossover and if it would have the abilty to select and set your own bandpass crossover bandwidth. The dx3065 component speaker system needs a 12 dB crossover that is set to 3800 Hertz for the proper crossover frequency for the woofer and tweeter. If you install a active 2-way, then you will still need to use the passive crossovers that came with the system.
When using a 2-way active crossover set the high pass for the componet speakers
between 80 to 90 Hertz and do the same for the low pass for the subs. This is the most common method of setting up a system using active crossover.
The "hissing" sound that you are hearing is from the "gain" on the amplifiers being set too high, or if you are using a equalizer and the high frequencies are boosted, then this can be a source of the noise as well. Try to set the gain on your amplifier to its "normal" or 12 o'clock position and set the tone controls on your headunit to a neutral position. This should reduce the noise that you are hearing in between tracks. The proximity of the passive crossovers will not have anything to do with this. Where are the tweeter levels set on the passive crossovers? If they are set to the +3dB setting, then this to can contribute to the noise also. If the tweeters are mounted high on the door, set the level to the -3dB setting on the passive crossovers. If you are still having problems after trying all of this, then give us a call at 800-377-7655 between the hours of 9 AM to 6 PM Eastern time Monday through Friday and we will be glad to help.
11-02-2001, 01:06 AM
Thanks for the help!
11-11-2001, 12:56 AM
a friend gave me a 4-way crossover that i'd like to install. he bought a new one and just gave me the old one. it's a LA Sound 4 way. there are no instructions and i'm kinda clueless on how to hook it up. my friend is out of town for a couple of weeks, so i'm hoping some of you out there can help me out. it is a 4-way crossover, but there are 5 sets of outputs labeled "rear fill," "LP," "BP," "BP," and "HP," and 1 out for a mono sub. there are also level controls for all of the above plus another one for "HP" and a bass EQ which consists of a freq. level and gain (dB). in addition to the level controls, there are also 6 switches for: LP--80, 120, 160; BP--80, 120, 160; BP--400, 600, 800;
BP--400, 600, 800; BP 2.5k, 4.0k, 6.0k; and HP--2.5k, 4.0k, 5.0k. can anyone help me out with hooking this thing up? my system consists of DX3065 6.5" components, EX572a 5x7's, and a 10" Infinity Kappa sub. the sub and the 5x7's are running off of a 4-channel amp and the 3065's from a 2-channel amp. front and back speakers both have speaker level to RCA converters off of the deck, and the sub input comes straight off of the deck via RCA. sorry for the long post, but any help would be GREATY appreciated! Thanks,
11-11-2001, 01:14 AM
here is a pic of the crossover:
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