What exactly is a high pass filter and what would values of 50, 80, and 125 actually 'do'?

I'm constantly playing around with my head unit settings (Pioneer P5550MP) and I honestly don't know what effect 'HPF' has.

Anyone who has experience with this unit, what settings do you use? There's a whole lot of weird and wonderful settings I can get to by holding down the 'audio' button (I think) which pulls up (from memory) stuff like 1K, 500k, 1N 2N 1W 2W 80: 40: treble: 4,6,8,10 (or 12)k, bass frequency 40:63:100

y'know that sort of wiggy advanced stuff.

Oh yeah, and another thing, with the sub I can selelct (again) 50/80/125 and give it a range from -6 to +6 (default 0) with +6 making the sub really thumpy. While on thumpy subs, what the hell does the 'frequency' values of 40:63:100 do?

I have a feeling that all this stuff is way over my head and used for pro tuning?

Is this related to the 50/80/125 HPF thingy?

I ask as I'm slowly learning my way through the features of the H/U, and experimenting to see what each little adjustment does. I usually end up resetting everything to what I think is normal and trying again. I still haven't worked out the subtelties of the equalizer yet :doubt:

Oh, which reminds me, is there a factory reset for this unit or something?

hpf: off
subs: off
low: +1
mid: 0
high: 0
fad: r3
bal: 0
bmx: 2 (dunno what this is but you'll find it with comp 1/2)
and the other feature (i think it's s sumthing sumthin):4

pumped on 30, shakes the living bejesus out of everthing

What exactly is a high pass filter and what would values of 50, 80, and 125 actually 'do'?

I'm constantly playing around with my head unit settings (Pioneer P5550MP) and I honestly don't know what effect 'HPF' has.

Anyone who has experience with this unit, what settings do you use? There's a whole lot of weird and wonderful settings I can get to by holding down the 'audio' button (I think) which pulls up (from memory) stuff like 1K, 500k, 1N 2N 1W 2W 80: 40: treble: 4,6,8,10 (or 12)k, bass frequency 40:63:100

y'know that sort of wiggy advanced stuff.

Oh yeah, and another thing, with the sub I can selelct (again) 50/80/125 and give it a range from -6 to +6 (default 0) with +6 making the sub really thumpy. While on thumpy subs, what the hell does the 'frequency' values of 40:63:100 do?

I have a feeling that all this stuff is way over my head and used for pro tuning?

Is this related to the 50/80/125 HPF thingy?

I ask as I'm slowly learning my way through the features of the H/U, and experimenting to see what each little adjustment does. I usually end up resetting everything to what I think is normal and trying again. I still haven't worked out the subtelties of the equalizer yet :doubt:

Oh, which reminds me, is there a factory reset for this unit or something?
A high pass filter will determine what frequencies reach ur speakers. As no speaker can play the entire frequency range you need these to avoid distortion. Subs need to be lowpassed this takes away the higher frequencies. Midbass drivers need to bandpassed to take away the low sub bass frequencies that your sub should be playing and to take away the higher frequencies that your tweeters should be playing. Consequently tweeters need to be highpassed to remove any mid and sub bass frequencies.

Generally:
Subs = lowpass between 50 and 150 hz
Mids - Lowpass around 2-3 khz depending on tweeter
Mids - highpass around 50 - 150 hz depending on quality.
Tweeters: highpass around 3khz

It all comes down to what you like, some people like to boost their bass just cos they can. In terms of SQ you want to aim for a nice flat response. The reason you cant just plug it all in and get a flat response from all your drivers is due to the acoustics of your car: Size, door volume, sub box volume, speaker locations, off axis response, windscreen, reflections etc. Which adds to the interesting effects that different locations can produce.

best way to tune correctly is to spend $50-$60 and get a pro to do it. They use an RTA (Real Time analyser) To measure the frequency response using pink noise. (like the fuzzy noise you hear through ur tv) This contains all frequencies at an equal level.

i would recommend setting ur higpass filter to 50-80 for your fronts. Otherwise they will distort at higher volumes as they cant handle the bass.

Peace

Tim

heh, fronts blew a while ago. Should have mentioned that

Now putting up with sub and 6x9's, haven't had the time to fix it.

Based on that, what would be a good config? I'm mainly interested in tuning the sub, as the 2 way 6x9's seem to power through pretty much everything without distortion.

If you are running 6x9's you dont want them to play anywhere near the subs as they will create cancellation due to the sub and 6x9's using the same enclosure. I would tell you not to use 6x9's at all, but since you will anyway, I'd try highpassing them around 130 hz.

yes, I know it isn't the best of setups

So I should either have the HPF on 50 or 80. Fine. What about the sub? I have the option of again 50/80/125.

What about bass frequency? Should I have it set to 40/63/100 or doesn't it matter?