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

[Bassbeater]

Nope! The Hotone Skyline noise gate has a HPf and a LPF.

See link above

greetings

Wise(b)ass

Hehe. Glad I visit this thread occasionally. I have the Skyline Gate, but did not know it had pass filters. I bought it just to tame a couple of ultra high gain guitar pedals,a nd after I recorded them I put it back in the box. The irony is that I've been passively looking for a HPF/LPF pedal for about 6 months. Going to try it out. Also note to self: RTFM!
Thanks!

 

[Stumbo]

No. I just want to know where Can I buy HPF for bass. My combo has HPF but my big rig not and it would be very usefull to get rid of useless rumble down below

Noise Gate and HPF by Hotone

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[Stumbo]

In the TB classifieds:

View attachment 3160192 View attachment 3160193 I’m putting up for sale or trade (more to come on that later in thread) my Tech21 Qstrip pedal. I’ve had the pedal for a few months and it’s honestly a great pedal. The only issue is that since I own Sans Amp Bass driver it seems to be in use more than the Qstrip. I’ve taken the next part from the Tech21 page for info on this pedal.
The ‘60s and ‘70s are widely recognized as the heyday for professional recording console design. The EQ and preamp sections of these near-mythical vintage consoles are highly sought after, even to this day. Some of the most iconic guitar and bass tones in the history of recorded audio were tracked “direct” straight into these consoles’ channel strips.
The Q\Strip was designed with sophisticated features that enable you to take these highly-coveted tone shaping circuits with you, whether you’re heading to a live gig or tracking in the studio or into your DAW. It’s compact, extremely cost-effective and in an ultra-convenient DI format.
The 100% analog MOSFET circuitry in the heart of the Q\Strip provides the warmth, girth and larger-than-life tones for which vintage consoles are revered. Add in four bands of pro-audio-quality equalization, two parametric mid bands, as well as high and low shelving filters, and you have incredible control over how your instrument cuts through on stage or in a mix.
The HPF and LPF give added control over the frequency spectrum whether you’re going direct with your bass, guitar, fiddle...or even a vocal. The Q\Strip is limited only by how far you are willing to push your creativity and how much of that juicy vintage tone you crave.
FEATURES
HPF cuts unmusical rumble associated with many instruments when going direct.
LPF rolls off undesirable frequencies. Can also be used as a speaker simulator. When used in conjunction with the studio-grade EQ section, you can recreate different speaker cabinet curves so you can go direct with your favorite distortion and effects pedals.
Very high impedance accommodates piezos and handles low impedance sources equally well.
XLR is capable to drive power amps and has a -20dB pad to accommodate mic level inputs on mixers and pre-amps.
1/4-inch output has switchable +10dB boost on tap, which is useful to drive power amps or push tube amps into overdrive.
Three modes of operation:
1. Phantom power via the XLR Output
2. Standard 9V alkaline battery (not included)
3. Optional power supply (Tech 21 Model #DC4)
Smooth-action custom actuator
All-metal housing
While it’s on my pedal board strip holding it in place is the peel off kind so you’d get it clean and smooth.
For Trades I’m open to Graphic Eq pedals.

 

[Pulverizor]

Decided to buy one of those little Hotone Gate units - not to replace my primary HPF/LPF unit, but the size is just so convenient for a quick, throw it in your gig bag for rehearsal, etc.

Plus, noise gate and the cool, green LED knob - what's not to like? I can always return it if I don't like it.

The LPF range is a little high for bass, but still low enough to maybe put some tame on an active bass if needed. But the meat-n-potatoes HPF range looks good - just wish there were more info on the HPF slope it is using.

How's that working out?
People are talking about them but no one has said if they're doing the job. Seems like a great solution for those on a budget.

 

[Bassbeater]

How's that working out?
People are talking about them but no one has said if they're doing the job. Seems like a great solution for those on a budget.

Several online reviews claim that the Hotone gate does not in fact LPF and HPF, but that those knobs define which frequencies are ignored by the gate and don't change the frequency content of the output signal.

The manual from Hotone clearly states that they are LPF/HPF.
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I haven't used this unit with bass yet(I'm using a cab simulator for bass) but I used it briefly with very distorted guitar and was happy with it although I was under the impression that it was not an HPF/LPF at the time. I just fiddled with knobs until it sounded good.

 

[stingray69]

How's that working out?
People are talking about them but no one has said if they're doing the job. Seems like a great solution for those on a budget.

I like it quite a bit - the size is downright miniscule - half the size of a typical mini-pedal. Makes for super easy placement on a pedal board. Beyond the size, the HPF works well enough but the manual does not state what the slope rates are - my guess would be -6dB. The HPF cutoff is subtle, but definitely audible especially as you climb up in cutoff value. The LPF range is a bit too high to be of any significant use on bass, but I knew this going in and wasn't too interested in that aspect. But for someone looking for a no-frills, basic HPF unit on a budget and/or size concerns, this one will work. The gate is pretty effective in cutting off single coil noise once you dial in a sweet spot between cutting off the noise vs. cutting off note decay length.

 

[Stumbo]

Hello, I would like to have your opinion on two preαmp, I play electric bass cort a4 only rhythmic accompaniment, I am between these two preamp, I play without a amp, and I connect directly through the xlr di out in PA system. Which of the two preamp i choose?

v

@MDBass :
I've owned both, and dramatically prefer the Q: the dual fully parametric mid controls are a HUGE plus, as is the HPF and LPF functionality, which are massively helpful if you use any kind of dirt.

This was Bass > Boost Fuzz > DP-3X (no dirt, comp only) > Q\Strip

​

 

[Stumbo]

v

@Ian Lewis:
Those (Greenboy login) frequency response graphs are a real eye opener! Especially the Ampeg B15, which a lot of studios seem to like. Reasonably flat from 70 to 500, a lower plateau to 3k, then just disappears

I've been setting my low pass filter @ 4k for that vintage sound without realising I was just emulating the B15

 

[Stumbo]

V

@Mushroo:
I have a new clean boost incoming. Happy to conduct scientific studies for the research group!

Jimmy, as our resident Ampeg expert, do you know whether the PF20T's input is closer to the PF50T's 0db input, or its -15db input?

Lately I have been using an HPF and clean overdrive before my PF20T.

Using the right pedals before a low-wattage tube amp can help it punch above its weight class.

 

[glocke1]

Those (Greenboy login) frequency response graphs are a real eye opener! Especially the Ampeg B15, which a lot of studios seem to like. Reasonably flat from 70 to 500, a lower plateau to 3k, then just disappears

I've been setting my low pass filter @ 4k for that vintage sound without realising I was just emulating the B15

link to the graphs?

 

[Stumbo]

link to the graphs?

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Yagotta signup and check around.

 

[JimmyM]

Jimmy, as our resident Ampeg expert, do you know whether the PF20T's input is closer to the PF50T's 0db input, or its -15db input?

I do not. Never have got a chance to play one, only the 50T.

 

[Stumbo]

From the thread: Things way too boomy...

v

@Bassmike62:

Finally did some testing and this is where things stand for now. I live in a semi, so I can't go full volume, but I'll have a chance to do that next weekend.

• Plugged in bass straight to amp to find a tone I wanted and found it on those settings: Gain and Master at 11 oc, Treble and HMid at 11 oc, LMid and Bass at 1 oc, Boost at noon;
  
• All amp switches are off (pad, contour, limiter, horn);
  
• Put the amp on a wheeled platform that puts it 4 inches above ground. An Auralex Gamma might be added in the future;
  
• Added the HPF between bass and amp and saw an immediate improvement;
• Moved the HPF at the end of the board, with that improvement still present;
• Moved back the blend knob on the BDDI to 12 oc;
  
• Turned off the Exciter effect in my MS60B patches.

As for ditching the pedal... I'm not ready to let go, but I can see the point. The only EQ comes from the BDDI and the amp, as the GEB-7 is set flat, with the level slider slightly above unity, to get a boost in some parts.

 

[glocke1]

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Yagotta signup and check around.

hmmm..

[Invalid or Expired Link Removed]

Yagotta signup and check around.

registered but not approved. direct link to the graphs via PM or posted here would be great...no time to really poke around.

 

[SoulReflection]

My Broughton "Always On" HPF is on it's way and was wondering what power supply would be best for it?

 

[BadExample]

I got one of these once I hit an 18V power requirement for a pedal. All I use now 90% of the time.Really nice if using several pedals, not so nice for one.

MXR DC Brick Power Supply

These are popular:

Truetone 1 SPOT

This should work as well:

https://www.sweetwater.com/store/de...power-supply-for-most-electro-harmonix-pedals

 

[Wisebass]

My Broughton "Always On" HPF is on it's way and was wondering what power supply would be best for it?

Hi SoulReflection

check this one!

Question about pedal power and supply

may the bass be with you

Wise(b)ass

 

[SoulReflection]

Hi SoulReflection

check this one!

Question about pedal power and supply

may the bass be with you

Wise(b)ass

Thanks! I've been following that thread as well. That might be a bit over-kill for my basic needs. I don't plan on becoming a pedal collector as I am old school. I am happy with a good sounding bass through a good sounding amp, like the old days...volume, bass and treble! I am thinking a 1spot 9v wall wort but then was confused about Broughton's comments on 18v for "more headroom". I could always use some of that .

 

[Stumbo]

Thanks! I've been following that thread as well. That might be a bit over-kill for my basic needs. I don't plan on becoming a pedal collector as I am old school. I am happy with a good sounding bass through a good sounding amp, like the old days...volume, bass and treble! I am thinking a 1spot 9v wall wort but then was confused about Broughton's comments on 18v for "more headroom". I could always use some of that .

I picked up the Truetone 1spot. No other pedals so it works fine.

 

[SoulReflection]

I picked up the Truetone 1spot. No other pedals so it works fine.

Thanks @Stumbo. Besides the usual use for an HPF, I want to try it with my IE hearing aids. I've had discussion with @agedhorse regarding the design of hearing aids and it just may help.