I have the choice of 50hz, 80 hz or 100hz. Im not sure if my door speakers do 50hz though... (these are choices from my hu) Ill say maybe. heh.

Any opinions?

Mike

high pass filter or low pass filter?

He'll want to use a LPF on the subwoofer and an HPF on his front stage.

And as far as where to cross it over at... that depends on what your front stage is capable of playing down to.

As low as possible, but your ears and the rest of your setup will decide.

This is your stereo, so just play around with it and set it where it sounds the best to your ears.

I read a few different responses on where the Q 12s will play up to. 1 said that it goes to 100hz evenly, another only 60hz. Ill probably do 80hz because the front speakers roll off at 50 or 55 hz. SHould be here in a few days!

Mike

They will "play" higher than 100hz, but if you are buying a Q you shouldn't be wanting to run them that high. I cross mine (not a Q, but an SQ install) at 40hz as I'd rather let the midbasses do what they are supposed to. Normally you do not want to overlap your crossover points either, underlapping is your friend

Why don't you use the crossover on the amplifier so that you have more than three choices?

Why don't you use the crossover on the amplifier so that you have more than three choices?

I would, but then I always think Im missing part of the sound because the little thumb dials are never that accurate. So Id rather do it from the hu. But Ill try a few different ways.

You know once I start fiddling with equalizers or crossover points, Ill be there all day.. hmm maybe this sounds better, no this... etc.

And Ill end up going postal. lol. So less choices are better 4 me.

Mike

What is wrong with regularly changing your settings?

I have crossovers for each driver in my system, not just my sub and I regularly fiddle for months getting everything dialed in. I'd call it a benefit as it just adds more to the hobby IMO.

What is wrong with regularly changing your settings?

I have crossovers for each driver in my system, not just my sub and I regularly fiddle for months getting everything dialed in. I'd call it a benefit as it just adds more to the hobby IMO.

Nah your right. And Ill end up doing it anyhow. And it does take months of listening!

Mike

HEY! I'm a postal worker..LOL! In my opinion half the joy of car audio is the tinkering of the system.

haha!!

Why don't you use the crossover on the amplifier so that you have more than three choices?

I would, but then I always think Im missing part of the sound because the little thumb dials are never that accurate. So Id rather do it from the hu. But Ill try a few different ways.

You know once I start fiddling with equalizers or crossover points, Ill be there all day.. hmm maybe this sounds better, no this... etc.

And Ill end up going postal. lol. So less choices are better 4 me.

Mike

Well if you get a good amp they should be at least decently accurate. It also helps if the crossover on the amp has a small range, like 40-150 hz, instead of one with a range from 40-500 or something. But one thing that you could always do, regardless of quality of crossover markings, is just play test tones. Then you can tell which frequencies are getting cut at which setting, and that way you can dial in exactly what frequencies you want the sub to be playing.

I just feel too restricted with only three settings like that. Plus I have mine at about 70 hz to make it sound best with my front stage and all, so those settings would make me unhappy. I was much happier after I lowered it from 80.

Why don't you use the crossover on the amplifier so that you have more than three choices?

I would, but then I always think Im missing part of the sound because the little thumb dials are never that accurate. So Id rather do it from the hu. But Ill try a few different ways.

You know once I start fiddling with equalizers or crossover points, Ill be there all day.. hmm maybe this sounds better, no this... etc.

And Ill end up going postal. lol. So less choices are better 4 me.

Mike

Well if you get a good amp they should be at least decently accurate. It also helps if the crossover on the amp has a small range, like 40-150 hz, instead of one with a range from 40-500 or something. But one thing that you could always do, regardless of quality of crossover markings, is just play test tones. Then you can tell which frequencies are getting cut at which setting, and that way you can dial in exactly what frequencies you want the sub to be playing.

I just feel too restricted with only three settings like that. Plus I have mine at about 70 hz to make it sound best with my front stage and all, so those settings would make me unhappy. I was much happier after I lowered it from 80.

I have a Kenwood Class D 120w x 4 for the front 4 speakers. I believe Class D has come along far enough to where it doesnt exhibit the issues of say 5 years ago. Great power! And the amp is tiny. Not many bells and whistles though. My front stage is 2x Pioneer TS-C720PRS, which are fantastic speakers! Great mid balance, open, really a home run 4 Pioneer. And I have 2x 6.5s TS-D702P, which are in the bak 4 the guests... Both are 50 - 60 w nominal, but Ive noticed more power is always good I guess you just run into the fact that you could blow a woof or tweet if your not careful. So I will be integrating with the 12 Q as soon as it arrives.

Mike

In a well treated door the 720's can play pretty damn low.

Though It says under specs it goes down to 25hz, they start to roll off at 80hz..

True, but that is not considering any cabin gain

True, but that is not considering any cabin gain

Your right. How many dbs do you think that adds to the low end?

M