In general how should it be set?

 

For what?

A good place to start is 80Hz on lowpass for the sub and 80Hz high pass for the front comps. But, it depends on the type of speakers, size and capabilities of each specific speaker. I have my Mag crossed at 80Hz, my front and center comps at 80Hz and my rear coaxials at 100Hz.

 

On a mono amp. Coustic 800D but is a amp in general supposed to be set from what the freq is on sub???

 

I would start at 80Hz and just play with it till it sounds good to you.

 

I think my amp goes up to 220hz. Could it cause amp to get hot if set to high? My subs are 33hz each do they have to be matched??

 

You are getting me a little confused. You are talking about the crossover frequency, correct? I really do not know what you mean by "My subs are 33Hz each". Setting the crossover frequency on the amp higher than 80 for subs will not hurt or cause heat. However, subs are designed to play only low frequency, typical below 100. If they are small subs, 6 1/2 or 8, then you might want to run them as high as 120. But, for larger subs, I would not set it any higher than 100.

 

Yes crossover freq(on amp). 33hz is what is said on the specifications. I was thinking frequencys had to be matched. Its in a prefab sealed.............

 

33Hz on your amplifier, is probably the lowest it can play, most people can't even hear that frequency, good ears can go as low as 20... All you need to do is listen to your best music, and adjust the **** so the bass "sounds" best to you.

The closer you get to the bottom(33hz) the less movement your subs will make, (this isn't volume i'm talking about fyi), just less a smaller chunk of the audio will make it to the sub - and this can be good, because in some systems with bigger cab speakers, can play the rest and it sounds balanced. If your car speakers are really small, and don't make ANY bass, maybe you want the **** turned closer to 125...

Choose whatever sounds best to you

You do not have to match this # to your subs... that thought is for box construction only...

 

Holy cow is Frostby, havent seen you around here for awhile...

Im thinking he means his subs have a Fs of 33 Hz.

Oh yeah TX, what they said^ lol

 

Yeah the Fs is 33 each. Is it safe to have freq around 20hz and cut the gain a little past halfway?

 

If you set your crossover at 20Hz for your sub, you are not going to hear anything from it. That is too low. Like I said, I would start with it around 80Hz and see how it sounds. Then adjust it up or down and find what you like.

 

Normal (average/most) LFE settings are 80Hz/24dB slope.

This setting will send all frequencies lower than 80Hz to your subs (so your mids don't play it), down to what the lowest freqs your subs are capable of playing. Then it will drop (slope) quick so it doesn't stick around (that hum/rumble/vibrate so to speak) in your subs. You want your subs to respond quick...this will give you that snappy quick punch that you want in a SQ sub. On the other hand...some like a shallower slope to mix differently (or better to their taste). You can also attenuate these freqs (individually) by cutting or boosting the settings on your EQ.

I hope I didn't confuse you...I used layman's terms instead of technical garble.

Basically, just play with it til it sounds good to you and you have little resonance.

EDIT: Also, can you just set your amp to "full" and use the xover on your HU?

 

Yes I understand that but that is with bass boost flat and gain barely on. Now if gain was to be set high an freq was around 20 could this cause damage or clip??

 

I don't understand... why would you want to set your amp at 20hz. I can't believe the x-over goes that low... -and if you could do this - it won't harm your sub. You still won't hear much if you even turn your gain all the way up@20hz.


There is some really good advice on this forum(like set it at 80hz for example, adjust to taste), you don't seem to be getting the answer you are looking for - maybe you are asking the Wrong question.

PS... HI BARTAK1... yup, i'm still around, been spending more time in the engine/drivetrain forums lately... more to learn over there... just not growing as much in this section (and I know you know what I mean )

 

No, Car Toys did it for me an it actually sounds better like this. But I was not sure if I was clipping it. Before I had the gain barely on an freq at 80(like you said) an it just didnt pound as hard. I would cut the freq up a little but it would get hotter than it already does................