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

#361
Seems to me that there are a couple of camps in regards to the use of a HP+LP Filter. It's mostly used innocuously, subtly 'cleaning up' the lows and highs but's it's also used as a specific 'effect,' helping to 'shape' a specific bandwidth. It's doesn't overly change your tone but can help 'shape it' to suit a purpose.

It seems 'most players' are using it subtly (as I am) to help tame but who's using it 'selectively' augment during a show?
 
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#364
GrapeBass said:
Seems to me that there are a couple of camps in regards to the use of a HP+LP Filter. It's mostly used innocuously, subtly 'cleaning up' the lows and highs but's it's also used as a specific 'effect,' helping to 'shape' a specific bandwidth. It's doesn't overly change your tone but can help 'shape it' to suit a purpose.

It seems 'most players' are using it subtly (as I am) to help tame but who's using it 'selectively' augment during a show?
Click to expand...

Say something once, why say it again?
Or_wink.gif
Post #76
 
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#367
lowplaces said:
I have a question that may have already been answered in this thread but if so I didn't see it.

Say I have a hpf set at 50hz. Does the hpf affect 50hz and everything below it as well ?
Click to expand...

Yes.

It ramps down, at 50hz it is 3db down, so the lower you go the more the level is attenuated. If you want just one frequency range cut, you want a notch filter.
 
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#370
Taustin Powers said:
Ah, so you actually boosted lows on the amp, and the FDeck cleaned up the very bottom low end?

It just occurred to me that I often play gigs through other people's backline, so having my own HPF in my pocket would always be a good idea. No matter what rig I play through, I can feed it a "cleaned up" signal. :)
Click to expand...
You're slow to catch on but catching on mightily well.
 
#373
Ok, I'm sold. So where should I place a HPF in this signal path ? I'm thinking between the Bassist and the Boost ?

P Bass > Radial Dragster > Keeley Bassist (set as limiter) > Creation Audio Lab clean boost > Radial ABY > Ampeg PF-50T's

Limiter and boost always on.
 
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#374
lowplaces said:
Ok, I'm sold. So where should I place a HPF in this signal path ? I'm thinking between the Bassist and the Boost ?

P Bass > Radial Dragster > Keeley Bassist (set as limiter) > Creation Audio Lab clean boost > Radial ABY > Ampeg PF-50T's

Limiter and boost always on.
Click to expand...
You might not need a limiter once you have the HPF.

What's the clean boost doing? Overdriving the amp preamp some?

I don't get the dragster either.
 
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#375
Downunderwonder said:
You might not need a limiter once you have the HPF.

What's the clean boost doing? Overdriving the amp preamp some?

I don't get the dragster either.
Click to expand...
...Just gonna jump in here because I can.

I assume the clean boost is to drive the tube front in the PF50T.

I don't understand the dragster either, or the placement of the limiter. I mean, you do you, bass brother! Of it sounds good then it *is* good. It's just that to me, your rig is arranged in a way that is very different to the way I'd arrange it if I had your pedals... Why use the dragster? I'm pretty sure your pedals are true bypass. Also, why did you choose to put the limiter right after your bass, instead of after the boost? And are you running two Ampeg PF-50Ts? Inquiring minds need to know!
 
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#377
Taustin Powers said:
So I am sold on the benefits of a HPF.

What are the benefits of the LPF for a bass player? Does the bass really output frequencies high enough to warrant this?
Click to expand...
Quite a bit more preference here, I believe. The question is probably more along the lines of do you hear high frequencies that you do not want to hear? (Proper punctuation there?)
 
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#378
Taustin Powers said:
So I am sold on the benefits of a HPF.

What are the benefits of the LPF for a bass player? Does the bass really output frequencies high enough to warrant this?
Click to expand...
Some players like the air up there and have the deft touch to control it. Hacks like me don't. Some have the touch and still don't like it.

When you are DI'd FOH gets it all and FOH speakers reproduce it as well or better than a bass cab with a tweeter( that a lot of us turn off ). You might disagree with how much zing is left in, LPF cuts it out before FOH gets it.

Also distortion pedals will commonly add a lot of fizz that can come out at damaging levels through FOH tweeters, if not sounding like arse.

So a LPF can also get your post EQ / fx signal through the soundguy objections.
 
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#379
Downunderwonder said:
Some players like the air up there and have the deft touch to control it. Hacks like me don't. Some have the touch and still don't like it.

When you are DI'd FOH gets it all and FOH speakers reproduce it as well or better than a bass cab with a tweeter( that a lot of us turn off ). You might disagree with how much zing is left in, LPF cuts it out before FOH gets it.

Also distortion pedals will commonly add a lot of fizz that can come out at damaging levels through FOH tweeters, if not sounding like arse.

So a LPF can also get your post EQ / fx signal through the soundguy objections.
Click to expand...

Very interesting. I always noticed that the DI signal through the PA tends to sound much brighter than what I am getting through my speaker (I always have the tweeter dialed off). If this is something I can combat with the LPF, I might go for the combo pedal (HPF & LPF) after all.
 
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#380
Downunderwonder said:
You might not need a limiter once you have the HPF.

What's the clean boost doing? Overdriving the amp preamp some?

I don't get the dragster either.
Click to expand...

Yes, the clean boost is to overdrive the amp. But I roll back the volume control on the bass to play clean. That's where the Dragster comes in. It negates the tone suck from rolling back the volume on the bass as well as my long cable run.
 
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