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

[/\/\3phist0]

@/\/\3phist0:

Stop procrastinating.

I love love love the Subway rig. You like bright as I remember, look at a D800+.

It has the bright switch and an HPF to tighten the bottom end.

Best rig I have ever owned. Check my profile. I have had a few.

I'm happily sticking with my D800, it's plenty bright, but I AM getting a Broghton hpf/lpf very soon. I don't need the effects loop, and the D800 's lack of variable mids is not a deal breaker. That said I would have gotten the plus had it been available when I bought my rig.

 

[mesaplayer83]

I'm happily sticking with my D800, it's plenty bright, but I AM getting a Broghton hpf/lpf very soon. I don't need the effects loop, and the D800 's lack of variable mids is not a deal breaker. That said I would have gotten the plus had it been available when I bought my rig.

I combine my D800 with this, and it's worked great - same thing with my Streamliner 900 and Rumble 200 Combo:

That being said, I recently sold the HPF-3 and have a Broughton L+HPF on the way to replace it... The fdeck worked great, but I wanted the additional LPF function and the control layout of the Broughton will work better for me, too...

 

[/\/\3phist0]

I combine my D800 with this, and it's worked great - same thing with my Streamliner 900 and Rumble 200 Combo:View attachment 3043570

That being said, I recently sold the HPF-3 and have a Broughton L+HPF on the way to replace it... The fdeck worked great, but I wanted the additional LPF function and the control layout of the Broughton will work better for me, too...

I had an fdeck previously, sold it. (Stupidly)

 

[kesslari]

Just got my Broughton always-on HPF. Seems fine. I'll be interested in what it does at gig volume. Meanwhile, I'm modding my mini-pedalboard to fit it.

 

[Stumbo]

47 hz (HPF) may be a bit too high for some users. I believe there is a DIY mod which extends the low range to ~30 hz or so.

Riis

@Zooberwerx Any info on the mod that you might have would be helpful. I searched unsuccessfully.

 

[Zooberwerx]

@Zooberwerx Any info on the mod that you might have would be helpful. I searched unsuccessfully.

I'll have a looksey but you may want to consider contacting the builder. I do recall some of the details: Apparently, the somewhat limited HPF low range has been an ongoing concern. VFE is too busy to do the mods so they provide the instructions / schem's...just need to find a competent tech to execute.

Edit: here ya go! I found this blurb in another thread...hope it helps!

"Peter at VFE can pass along info for an easy mod (replacing two capacitors) which will extend the HP portion down to as low as 15hz. I exchanged a few emails with him about this pedal and I plan to order one soon. His schedule doesn't allow him the time to do any additional mods himself anymore, hence the DIY approach. As for the LPF I'm not sure why you'd want anything above 15 khz anyway."

This refers to the VFE Standout pedal VFE Standout LPF/HPF

Riis

 

[Mushroo]

That VFE Standout pedal looks intriguing!

There is a misconception that HPF's filter out everything below the cutoff, like if you tried to use a 47hz HPF, all the notes on your B string will disappear. But assuming my understanding of HPF's is correct, if you set the VFE to 47hz and the slope to 6db, then you are -6db at 23hz and maybe -3db on your low B. That's pretty subtle. I personally like a HPF around 100-120hz so I can't imagine needing a HPF that goes down to 15hz. .

 

[Zooberwerx]

That VFE Standout pedal looks intriguing!

There is a misconception that HPF's filter out everything below the cutoff, like if you tried to use a 47hz HPF, all the notes on your B string will disappear. But assuming my understanding of HPF's is correct, if you set the VFE to 47hz and the slope to 6db, then you are -6db at 23hz and maybe -3db on your low B. That's pretty subtle. I personally like a HPF around 100-120hz so I can't imagine why anyone would need a HPF that goes down to 15hz. .

Good point. The 6dB is a little too shallow for my tastes but that's a great representation. I believe the Broughton is 12dB and the soundguy-recommended slope on my PA's DriveRack is 18dB BW.

Riis

 

[Mushroo]

Not to mention the VFE has a Blend control, so you can put some of those low frequencies back, if you feel the effect is too extreme.

My Broughton HPF is in the mail. I'm excited to join the HPF Club!

 

[mesaplayer83]

Not to mention the VFE has a Blend control, so you can put some of those low frequencies back, if you feel the effect is too extreme.

My Broughton HPF is in the mail. I'm excited to join the HPF Club!

I'm also waiting for a Broughton - I have to say that adding a HPF made more of a positive difference than I thought it would...

 

[RoadRanger]

The fundamentals of any notes below the low "A" just add mud - it's all about the harmonics on those low notes which cut though best without that mud . Unless you're playing by yourself in your bedroom then have at it .

 

[Stumbo]

I'm also waiting for a Broughton - I have to say that adding a HPF made more of a positive difference than I thought it would...

My work is done here.

 

[SoulReflection]

My work is done here.

Nope...us old folks need constant reminders .

 

[Stumbo]

Nope...us old folks need constant reminders .

I can do that! If I remember.

Carry on.

 

[BadExample]

I can do that! If I remember.

Carry on.

I find it helps to mark it on the paper calendar I never remember to look at.

 

[-Asdfgh-]

My work is done here.

I hope you bought stock in Broughton earlier. I get mine in a week.

 

[Stumbo]

I was reading about battery powered Amps and most perform poorly for bass.

fdeck to your rescue!

His HPF is battery or wall-wort powered.

You can use the HPF with a battery to possibly keep your battery powered amp from distorting so much and running its battery down so quickly.

 

[Al Kraft]

I was reading about battery powered Amps and most perform poorly for bass.

fdeck to your rescue!

His HPF is battery or wall-wort powered.

You can use the HPF with a battery to help keep your battery powered amp from distorting and running its battery down so quickly.

Interesting thought about how to use a HPF to perhaps get better performance and/or a longer battery life out of those little portable busking combos. I wonder if any of them employ a HPF already to keep the amp from trying to create the more power hungry lows and sub-lows in the first place.

 

[Johno Dunn]

Interesting thought about how to use a HPF to perhaps get better performance and/or a longer battery life out of those little portable busking combos. I wonder if any of them employee a HPF already to keep the amp from trying to create the more power hungry lows and sub-lows in the first place.

I do this for my powered wedge.

 

[Stumbo]

Would this bass eq pedal, Whirlwind bass 10, with cut/boost of 15db and freqs of 20, 40, 80, 160, 320, 600, 900, 1.3, 1.8, 3K, plus Volume be a usable HPF?

If the Whirlwind had 20,40 full cut, -15db, would it sound different than an HPF set at 40?

What are the + and -?

Bass Ten 10 Band EQ FX Pedal - Catalog - Whirlwind

There are graphs of the Q for each frequency "full on" in this doc.
[Invalid or Expired Link Removed]

Maybe @Passinwind or @agedhorse or @fdeck might stop by.