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High Pass Filter (HPF) and Low Pass Filter (LPF) Mega Thread

#2,021
KJMO said:
I found out our sound guy is using a LPF set at 2k on my bass, so I sat at home and set a LPF at 2k with both eq's I have available (motu audio interface and Helix Stomp), and I don't see how that could be reasonable. I think setting it at 4k sounds fine, but 2k sounds awful. I think I could use any bass or cardboard box probably, and it would sound essentially the same. I looked for info on LPF and didn't see much, although I couldn't read all 100 pages (sorry). Any thoughts?
Click to expand...
I see that your sound guy is the same as the engineer from my last recording session!
 
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#2,023
Some HPF love in a zombie thread involving multiple people damaging their gear.

why the hell do i keep blowing my speakers


Fishheadjoe said:
Once you have everything in proper working order, I highly recommend that you consider a High Pass Filter if you want to keep that 4x10 in working order. I would also suggest that you look into an additional 4x10 to ease the pain your single cab is feeling.
IMHO, you are asking too much from a single 410 and given that most 4x10's will blast the crap outta your knees and ankles, it's giving everything is has and you are missing most of it!
Fishheadjoe
Click to expand...
 
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#2,025
murph7489 said:
I bought a broughton hi pass + low pass filter and it has no numbers on it...I took it out of the package and then put it back in the package where it has set for 4 months..I am lost on the no numbers thing...
Click to expand...
Ears work. Wail on bass and bring up the HPF until it sounds lacking then . Same in reverse for the LPF.
 
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#2,026
murph7489 said:
I bought a broughton hi pass + low pass filter and it has no numbers on it...I took it out of the package and then put it back in the package where it has set for 4 months..I am lost on the no numbers thing...
Click to expand...

Do you have an audio interface and a computer? If it were me I'd at least run a simple RTA test and figure out the basics with the controls on full CCW, noon, and full CW. But I'd do that even if it had numbers printed on the faceplate, it's just how I roll. ;)
 
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#2,027
Passinwind said:
Do you have an audio interface and a computer? If it were me I'd at least run a simple RTA test and figure out the basics with the controls on full CCW, noon, and full CW. But I'd do that even if it had numbers printed on the faceplate, it's just how I roll. ;)
Click to expand...

Yes, ARTA Software worked for me just awesome during spring lockdown to know the numbers on my HPF/LPF: High Pass Filter (HPF) and Low Pass Filter (LPF) Mega Thread. But at the end I'm really digging the no numbers thing too :bassist::bassist::bassist:.
 
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#2,028
#2,031
bassically_eli said:
Do you play upright? I think that approach would probably work with my electrics (I don't really play a lot of electric gigs), but I'm always adjusting the HPF(s) for my upright.
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I do, but I only own an EUB at the moment, and most of my gigs over the last 15 years or so were on that. Most of my DIY amps have a single full parametric band that goes down to around 100Hz as well, with a very tight notch option if desired.
 
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#2,033
I made my own HPF / LPF box
krdp_nsk said:
It's my "kid"))
Show me your compact pedalboard setup
Show me your compact pedalboard setup
Click to expand...

Om3Z-tesGSI.jpg
 
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#2,035
MarkA said:
Cool. Looks compact and easy to use.

Would you mind elaborating on it? What are the slopes and the ranges of the filters? Is it your own design? Any other interesting particulars (type of filter, etc.)?
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In my post above, I attached links to a description of the device, circuits and examples of sound processing.

Yes, I developed it myself using online calculators HPF, LPF, BPF:
• High Pass Filter Calculator
• Low Pass Filter Calculator
• Bandpass Filter Calculator
 
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#2,037
krdp_nsk said:
View attachment 4215346
Click to expand...
Hah! Yes.


krdp_nsk said:
In my post above, I attached links to a description of the device, circuits and examples of sound processing.

Yes, I developed it myself using online calculators HPF, LPF, BPF:
• High Pass Filter Calculator
• Low Pass Filter Calculator
• Bandpass Filter Calculator
Click to expand...

Thank you -- I saw the photo but missed the links. I see, here, that the range for the HPF is 22 Hz to 212 Hz and the LPF 308 to 17 KHz, which seems wide-ranging and practical (I doubt I'd sweep that low on the LPF, but I don't suppose that it hurts to have the range!).

As for the circuit diagram, I am ignorant enough of such things not to be able easily to decipher the order/slope of the filter by looking. I see capacitors and resistors... one cap on the HPF side, one on the LPF side? Are these first order filters (6 dB/octave)?
 
#2,039
MarkA said:
I see, here, that the range for the HPF is 22 Hz to 212 Hz and the LPF 308 to 17 KHz
Click to expand...

The values between 22 Hz and 212 Hz and between 308 Hz and 17 kHz by the position of the pot regulators were calculated using online calculators from the messages above (just for beauty, without measuring - I understand that this is stupid, but I was lazy, because the final result of the work I quite liked the device)
 

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