high and low pass filters

All of your low pass filters won't affect 50 Hz, they pass 50 Hz. That is their job.:)

You seem to be missing the point that the low pass filters pass the frequencies below the frequency of the low pass filter.

Try playing a 200 Hz signal with the 80 Hz low pass filter on, then off, and tell us what you hear.
 
What speaker are you talking about?

The low pass filter is for the subwoofer. You set it at the highest frequency (and below) that you want the subwoofer to reproduce.

The high pass filter is for the mid range and tweeters. You set that for the lowest frequency (and above) that you want those to reproduce.

You don't want hi frequencies going to the subwoofers and you don't want low frequencies going to the smaller speakers. The filter settings let you fine tune which frequencies are the crossover point where another speaker takes over.
 
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I was referring to the subs/

So the hpf will not effect the subs then? only the low pass? I was assuming it was for all speakers.
 
Correct, you use a low pass filter for the subs, which passes the low frequencies at, and below, the frequency of the filter.

You don't want high frequencies to pass to the subs, so you don't apply a high pass filter to them.

Listen to your test CD with just the subs, and try the different low pass filters at different frequencies.

The mid range speakers, you want a high and a low pass filter.

The tweeters, you want a high pass filter only.

This is assuming you have a 3 way speaker setup, subwoofer, midrange, and tweeter.

There are a lot of articles on the web about speaker crossovers, here's one I found real quick.

http://sound.westhost.com/lr-passive.htm#intro
 
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Well after playing a 100 hertz test tone(didn't have 200) and cycling between 160 lpf and off, there was a little to no difference in the bass.
 
calisonic said:
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Well after playing a 100 hertz test tone(didn't have 200) and cycling between 160 lpf and off, there was a little to no difference in the bass.
Click to expand...

Of course there wasn't a difference, there is not supposed to be a difference, a 160 Hz low pass filter will PASS 100 Hz!

Try the 80 Hz low pass filter with a 100 Hz or higher signal.
 
Bill, fire up your equipment and take a series of pics of the oscilloscope screen running test tones through a filter. ;)
 
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Sorry, I meant 80 htz not off.
 
driller said:
Bill, fire up your equipment and take a series of pics of the oscilloscope screen running test tones through a filter. ;)
Click to expand...

:)

I'm not sure that would help at this point, but I've already got a few science projects I have to do today, along with some snow moving.:D

Here's a wiki article about low pass filters. You can click on more links there, depending on how much filter properties you care to get into. The basic idea of the filter is pretty straight forward though.

http://en.wikipedia.org/wiki/Low-pass_filter
 
Ill check that out thanks for all your help guys.

From what a friend told me, lpf doesn't necessarily block each and every frequency immediately above the setting, but it tappers off, depending on the quality and design of the filter, it may not hit zero (volume of frequency above lpf setting) until as much as 300 hertz above. He even showed me a graph where it makes a bell shape starting at the lpf setting in this electronics book.

So i am probably not hearing a difference because the test signal is 100 hertz and the filters lowest setting is 80 which leaves only a difference of 10 hertz. If I had a 400 or 500 signal then I probably could it seems.

Until I find one, I will set lpf to 160 and hpf to 120.

Thanks again.
 
calisonic said:
I will set lpf to 160 and hpf to 120.

Thanks again.
Click to expand...

This doesn't make sense. Bill may be able to confirm but the LPF should be set to the lowest setting (so the SUB only receives LOW BASS TONES) and the HPF set to higher settings (so the mids/tweets only receive MID/TREBLE TONES).
 
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I guess its just me because I consider 160 to be low.
 
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But hpf should probably be higher. Ill play around w it.
 
Low is low and high is high. 1 is a low number, 1000 is a high number. Not to be rude, but why doesn't this make sense? :)

Do this. Set your 80 hrts to +6 (or the highest setting). Now you should have TONS of BASS.
 
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There is only a setting for sub +/- not specific frequency. An if I were to block above 80 for lpf and below 1000 for hpv, would I not be losing frequencys in between?
 
This isn't making much sense. If you have a separate output for the subwoofer why is there a high pass filter?

What exactly are these filters connected to?

What outputs do you have coming out of the unit, and where are they going?

Do you have a manual for it?
 
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There is an rca red/white out put for subs that goes to the sub woofer amp, I can only assume the lpf is dedicated to that output.

The other out put is for the interior speakers and connects directly into the factory harness via adapter.

The hpf and lpf settings are built into the head unit.

The manual doesn't say anything about the filters and I even had to call Sony a couple times when trying to connect my phone via blutooth because it is so vague. ( They didn't help, I actually accidentally figured it out when talking to them)
 
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