Crossovers or filters in your systems?

[Desert Stallion]

So here's a question for y'all, who here has crossovers or filters in their systems? If so, who has built their own crossovers and who buys their's, and what brands do you use? Active or passive? What frequencies and orders do you use for what types of speakers?

Just curious as I don't think this has been addressed yet, and personally I think that crossovers are kinda important in a system that you want to push harder and retain not only fidelity but also try to keep from blowing out your speakers.

[JoshMcMadMac]

I'm not BIG time into the stereo, but I have a fair amount of aftermarket in my car. I use the amps built in crossovers, it does the job I need it to do. Nothing fancy, nothing super-high quality, but definately nice enough to thoroughly enjoy. Oh, and my stereo has some adjustment to it as well.

[Capt. Zilog]

I have a number of built in band pass filters (head unit has one, EQ has two or three, speaker amp has two, and sub amp has one) but I still bought a dedicated crossover. It's completely active, so I don't have to be overly concerned with phase shift. I have built small passive ones in the past, they are very simple circuits unless you want high order, fast rolloff ones (like 24db/octave, but that introduces hard core phase shifting that you have to account for).

Unfortunately, I can't remember the name of it, nor do I want to go outside right now (so cold) so I'll tell you tomorrow. It has 1,2,or 3 inputs and 3 outputs, each has a bandpass filter and the sub-out has a boost and a wave shaper on it.

[SQ_LSC]

I've used handmade passives in the past. Nice being able to run a full system off of one amp which you can't do active. The LSC isn't at the point where I can post any deffinitive specs. yet other than that system will be 8 channells all active.

I'll give ya' the rundown on my SUV though.
I'm running audio control equalizers and crossovers for the bottom end with passive on the top end. I have a set of 10" bass drivers in the cargo bay for volume use only. They are seldom used at the same time as the main system.

So focusing on the SQ part of the system, I run coaxial digital to the back of the truck where the D/A is. From there it is run through an active crossover separating the front subs from the components. This is a 4th order crossover. The subs are lowpassed out at 73hz and the components are highpassed out at 56hz. From there the signals run through a bank of equalizers. From there each set of outputs are run through a balanced line transmitter which raises the voltage to around 16volts. Those two seperate signals then go to there respective amps.

The subs then get there signal directly, where the highpassed signal goes to the passive crossovers. This is a 2nd. order crossover AT 3200HZ which then passes to the mids and tweets.

As a preference I tend to prefer shallower 1st and 2nd order slopes for the high end and steeper 4th and 5th order slopes for the lower octaves.

[pepsi2185]

captain zilog what kind of active crossovers do you use?

[Desert Stallion]

SQ, that's damned impressive. Why did you run the crossover for the mids at 3200Hz? Or was that because the same feed runs both mids and the tweeters?

[SQ_LSC]

Yes, same feed

[Capt. Zilog]

quote:Originally posted by pepsi2185:
captain zilog what kind of active crossovers do you use?

Sorry it took so long to get back to you, I'm just not thrilled about going outside for longer than necessary. The brand is Coustic. I think the model number is 150, but I'm not sure. It's a nice unit, at least for what I do.