misty frequencies

[Jonah 101]

Hey all. I have a question.

I have a sub set up low pass at 80hrz and my front speakers currntly have an amp with a variable high pass filter for the fronts, but i had an amp with a fixed high pass at 150hrz. andit sounded really good. loud as, but the problem is that there is and band of 70hrz that is muted and takes depth away from the music. the current amp with variable high pass is shit because it ranges from 40hz-600hz but its alotta of guess work as to where you are.

what i want to do.

put the old amp back on the front and get some high quility speakers that can handle frequencies down to 80hz ish. what would be best 6X9's or some top quility 6in components.

or!

move my current speakers (front) to the rear and get some high quility 6in splits for the front.

thoughts?

[Nic92]

don't do what i did and get some 6.5" splits with massive drivers hahaha

[Jonah 101]

I got some 6.5 splits in there now, but the magnets not that big

[sweefu]

If you are replacing speakers, the better option would be to buy something quality for the front. What is your budget? Have you tried crossing the sub LPF80hz and front speakers HPF80hz? You should be able to adjust this correctly using the adjustable crossover.

[Jonah 101]

I dont know if i get what you mean, but I set on my HU the LPF to 80hz and the HPF on the HU to 100hz and it still played everthing. its a Fusion FE-402

[sweefu]

So sub is on LPF 80hz on the headunit and the front speakers are on HPF 100hz, set on the amplifier? What is the LPF on the amplifier for the sub set on?

[StoneX]

I think he has the sub low passed at 80Hz on the amp and the fronts are currently high passed at who knows what because the 40-600Hz dial on the amp is too hard to determine the increments. Personally, I'd ignore that you don't know what you're exactly setting it to on the current amp dial and just set it so it sounds good.

I've always set the high pass and low pass at the same frequency... Generally, 80Hz low and 80Hz low but I've had pretty decent speakers. When I've wanted better sound quality I'd drop both filters to 63Hz and then I wanted it loud I'd bump them both up to 100Hz. This was all done via my head unit, I did set the sub amp LPF at 120Hz and speaker amp HPF at 50Hz as I knew I've never want them to play outside that range.

[sweefu]

Ah ok, I get it now. I'd also suggest trying 100hz. Depending on the speakers, an 80hz cross over may be a bit harsh for them, especially if they door has not been treated properly. Best to play it safe, playing them lower will sound great but could damage them.

[Jonah 101]

I tried setting the HPF on the HU to 100HZ but the sub kept making noise even though it LPF is set 80Hz on the amp

having the HPF set to 150Hz for the speakers seems fine for Dubstep ect but metal and Rock is where you notice the missing sound. Not only is the amps variable hight and low pass filter hard hard to put where you want they seem to do f##k all.

What would you reckon the ideal frequency range is for some sound stream splits 90watt rms

[sweefu]

What's the model number? How are they installed? It will be 100hz or possibly 80hz, you can try both, the 80hz will probably sound nicer and give you more midbass kick, though you have more chance of damaging the speakers (if they are in an open door, not much of an enclosure for them). Also, what is the model of your amplifier(s)?

[Jonah 101]

Speakers

soundstream SPC.6T (6.5" 2-way components 90watt RMS) <----these apparently dont exist
Amp, fusion FE-402

Subs
Two Fusion twelves
Amp, Pioneer 760w GM5200T

I have a DVC Pioneer 12" sub (1400w I think) I will get another one of those with a bigger amp and put it in my ported box. the sub amp I have as it is is too small.

[MAG00]

I tried setting the HPF on the HU to 100HZ but the sub kept making noise even though it LPF is set 80Hz on the amp

Not only is the amps variable hight and low pass filter hard hard to put where you want they seem to do f##k all.

The low/high pass filters don't simply cut off sound at the set frequency, instead they attenuate it at a "slope". If you want a more detailed explanation I can dig something up for ya.

Can't believe Sweef didn't pick up on that!

Also just FYI: Attenuate means to make smaller, so in this case it would make it quieter after the passed frequency.

[StoneX]

I tried setting the HPF on the HU to 100HZ but the sub kept making noise even though it LPF is set 80Hz on the amp

The same amount of sound or less sound? Because high pass and low pass filters don't cut the sound off completely. They just gradually reduce it from that frequency and down or up depending if it's LPF or HPF.

Also, the HPF on a head unit won't affect the subwoofer output, if that's what you're using to output to your sub.

[edit]
Too slow.

[Jonah 101]

lol I figured that out today that the HPF/LPF on the HU dont affect my front speakers or sub, speakers are amped.

I did however hook up some crappy Panasonic CJ-A1623U, 6.5" 2way speakers in the rear (I even took out the parcel tray and hid them lol) and set the HPF at 100hz, turned off the HPF on the amp for the fronts then cranked down the bass on the HU right down and wound the sub amp right up.

now it sounds just right. hopefully in six months I wont want more..............

[sweefu]

Can't believe Sweef didn't pick up on that!

Didn't even cross my mind to mention slopes lol, even though today I was playing with the cross overs with my new tweeters haha

[Jonah 101]

Its hard case though because I did bare that in mind the in might gradually taper, but I turned the sounds up loud and wound the HPF screw back and fourth, diddnt noticed any difference?

[sweefu]

Just to be sure

[juzzyx]

Just to be sure

So should I set my LPF to 50hz to get the most bass? my HPF is currently at 120hz with lows on -2

[Jonah 101]

Too bad me LPF on my sub is fixedd at 80hz, still pumps hard though

[MAG00]

So should I set my LPF to 50hz to get the most bass? my HPF is currently at 120hz with lows on -2

If you set your LPF to 50hz then your subwoofer will only play slightly above 50hz right down to its lowest frequency. This also means that you need to HPF your front speakers to 50hz, otherwise you may end up with a whole section of bass/mid-bass missing. It is generally not advised to HPF your fronts at 50hz unless you know what you are doing, otherwise you can quite easily damaged the woofer.

[juzzyx]

If you set your LPF to 50hz then your subwoofer will only play slightly above 50hz right down to its lowest frequency. This also means that you need to HPF your front speakers to 50hz, otherwise you may end up with a whole section of bass/mid-bass missing. It is generally not advised to HPF your fronts at 50hz unless you know what you are doing, otherwise you can quite easily damaged the woofer.

Of course lol. The frequency response of my fronts is like 65 - 20000hz. I like having my system as loud as it can go. I only really pump Dubstep. Would it be worth losing that range 60 - 120hz to get my system louder?

[Jonah 101]

When they say frequency response, exactly what volume does that mean. Beacause my rears (panasonic) say 35hz-22kHz, but there is no way in hell they could stand 50hz and half volume.

[sweefu]

On normal headunits you can not adjust the slope of your crossovers, so you can't just run a very low cross over and assume it will all be ok, A lot of amplifiers run a 12dB/octave slope.

[Jonah 101]

i wasnt asking about slope, just how they rate the frequency response. because my rears (crap i know) say 35hz-22kHz, but there is now way they can perform decently at 35hz

[sweefu]

Perhaps in an 'ideal environment' they may be able to for a short amount of time, perhaps similar to 'max power' ratings. For example, my midwoofer will happily play a 63hz HPF on a 12dB/octave slope in a correctly constructed box, but in my car I would hesitate to do this, although my door is sealed it's not the correct enclosure for the speaker. Although it might be ok, I play it safe and run it from an 80hz HPF.