Ok picture this...
1200w amp, 1 sub running off 2 of the channels, the channels are bridged, set to only run bass (LPF). Works well, only plays bass, no treble, GREAT!
Now the parcel shelf speakers are set to HPF, but they are still playing bass :S. And it's bloody annoying cuz they start making stupid cone noise WAY WAY before the subs even start to get very loud, anyway can i filter the speakers some more to only get higher frequencies through? cheers :).

It is possible your Amp does not Support High Pass if running in Tri-mode ??

It may also be possible that your HPF filter maybe set on your Subs Channel and your Low Pass on the 6x9's

This is where you need to level set your system, meaning you will have to spend time adjusting the gains so the 6x9's do not get so much power to them this will drop their volume but also drop their distortion possibility..
Are you fronts amped ?? if so , then these will need to be level set aswell..

How to level set your System...

1. Turn the Gains down on your Amps to Nothing
2. Turn the Volume of Your Deck up till you hear the speakers distort, then turn the volume back down to just before you hear it distort
3. Adjust your Front speaker Gain till you hear them distort then down alittle till they play the signal clean...
4. Repeat for the Rears (If you only want them as rear fill, leave them on minimum Setting)
5. Then Adjust your Subs in the same manner.. Adjust the gains till your Subs make a Horrible Cardboard slapping sound, then back gain down a bit.. Best to use an R&B song with a continuous Deep bass line...

Be Very Carefull when level setting your system as too much Gain will Blow your speakers.. If you send a Distorted Signal to your Speakers they will prematurely Burn out.. Never run Amps at Full Gain, 3/4 of Max is sufficient..

The sub's are definately set to LPF, as they only start playing when there's a beat. That's why i dont understand why the parcel shelf is playing bass set to HPF, but yes i may have to turn the gain down, though i think i need some sort of wierd alan key (for my boss amp). I dont have fronts yet, but they will run off of my other amp that is currently just powering my other sub (bridged). The same thing happened on that amp though, had it running on HPF and it still played bass, so i dunno, was hoping i could filter out the bass somehow.

yeah you can filter out the bass. All you need to do is get some capacitors. i would recomend the 330 micro farid capacitors. What this does is filter out all the frequencys below 330 Hz. so that way you will have no bass coming out of your speakers. They cos about 3 bucks each. and you can get them at good qual audio stores (do not get them from tandy or dick smiths) as they are the wrong type.
any questions ask

Your other Alternative is to buy an Active Crossover so it can filter out all the unwanted signals.. But they are really expensive..


as a really cheap alternative, wire your rears out of phase this will boost treble and reverse the Midbass :badgrin:

Your other Alternative is to buy an Active Crossover so it can filter out all the unwanted signals.. But they are really expensive..
yep they are. so stick with a 3 dollar capacitor.

Yeh that's what i'm after, i just didn't know what it was lol, so i just go in and ask for a 330 micro fab whatever it is. Do you attach one to each wire (+ and -)? or just +?

Yeh that's what i'm after, i just didn't know what it was lol, so i just go in and ask for a 330 micro fab whatever it is. Do you attach one to each wire (+ and -)? or just +?
Nar just to one or the other it don't matter. i've done it on the positive side.
Just be aware that they are poller sensitive. so when you cut the wire, test them before soldering :D
the capacitors are about 5cm in length just so you have a idea when you buy em.

I just tried one of my dads old capacitors (470 micro firad) and it didn't do anything, though it could be old and not working, but he reckons you'd use peak firad? that make any sense?

Sigh.

USE BIPOLAR CAPACITORS. Not polarised capacitors. They are measured in microfarads, shown as uF (actually, the Greek 'mu', for micro - it has a little tail at the front.)

320uf at 4 ohms is a 6db/octave crossover at 120Hz.

120hz is still appreciable bass, I would try higher at 200uf which gives 200Hz.

Have a look in the jaycar catalog, 2005 version at page 272.

They are placed in series with the speaker lead. Positive or negative it doesn't matter.

>but he reckons you'd use peak firad? that make any sense?

No, ask him again when he is sober! :)

Cheers
Heath Young