The Chaos Custom Shop HPF is a Chaos Custom Shop eq pedal, currently around $69.18. Close alternatives include the dpFX Pedals Variable Low Pass Filter and the Empress Para EQ DLX. It pairs well with the Fender Prosonic and the Dumble Steel String Singer.

Chaos Custom Shop HPF

Chaos Custom Shop · pedal

The Chaos Custom Shop HPF (High-Pass Filter) is a dedicated frequency-filtering utility pedal for bass, cutting unwanted low-end rumble or muddiness below a set frequency threshold. Built by Chaos Custom Shop, a boutique maker specializing in precise bass signal-shaping tools, it offers bassists clean, surgical low-frequency control independent of an amp's built-in EQ.

What stands out

  • “Useful both live, for controlling stage rumble and feedback, and in the studio, for keeping a bass track's low end clean and controlled”

    — from the reviews

  • “is a dedicated frequency-filtering utility pedal for bass”

    — from the listing

  • “Primary use case is live sound situations where excessive low-end can cause stage rumble, feedback, or muddiness in a mix, and studio recording where a clean, controlled low end is needed”

    — from the community notes

  • “Valued for offering precise, dedicated control over low-frequency content, letting bassists cut unwanted rumble or excessive sub-bass”

    — from the community notes

  • “Standout strength is the dedicated, purpose-built nature of the filter, offering more precise control than a generalist EQ pedal's bass control”

    — from the community notes

  • low end
  • frequency
  • studio
  • bass
  • filter
  • stage
  • high pass
  • eq
$69.18View on Reverb

Price updated Oct 23, 2026

Genres the Chaos Custom Shop HPF is commonly used in

  • Acoustic
    citedInferred from shared tonal signals, not a stated genre tag.
  • Alternative
    citedInferred from shared tonal signals, not a stated genre tag.
  • Funk
    citedInferred from shared tonal signals, not a stated genre tag.
  • Soul
    citedInferred from shared tonal signals, not a stated genre tag.
  • Electronic
    citedInferred from shared tonal signals, not a stated genre tag.
  • Rock
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Chaos Custom Shop HPF

Fender Prosonic

amplifier

22% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Fender Prosonic's warm balances out the bright tone

Comes later in the signal chain

Dumble Steel String Singer

Dumble

21% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Run Dumble Steel String Singer after it and the bright edge settles into something more smooth

Comes later in the signal chain

Hiwatt Park P18LH 'Little 45' Handwired18W

Hiwatt

tonal match
$4300via Reverb

Comes later in the signal chain

Run Hiwatt Park P18LH 'Little 45' Handwired18W after it and the bright edge settles into something more warm

Orange BT1000H Terror Bass 1000-Watt Bass Amp

Orange

tonal match

Comes later in the signal chain

Orange BT1000H Terror Bass 1000-Watt Bass Amp leans warm right where the bright tone needs it

Orange Terror Bass

Orange

tonal match
$754.36via Reverb

Comes later in the signal chain

Orange Terror Bass leans warm right where the bright tone needs it

Ampeg V-4

Ampeg

tonal match
$559via Reverb

Comes later in the signal chain

Ampeg V-4 leans warm right where the bright tone needs it

Park P45H

Park

tonal match

Comes later in the signal chain

Park P45H's warm balances out the bright tone

Ampeg BA 108

Ampeg

tonal match

Comes later in the signal chain

Ampeg BA 108's smooth balances out the bright tone

Pedals that stack with the Chaos Custom Shop HPF

Electro-Harmonix Green Russian Big Muff

Electro-Harmonix

17% match
$76.22via Reverb

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Where this leans bright, Electro-Harmonix Green Russian Big Muff answers back smooth

Comes earlier in the signal chain

Boss OD-1 Overdrive

Boss

17% match
$218via Reverb

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Boss OD-1 Overdrive leans smooth right where the bright tone needs it

Comes earlier in the signal chain

T-Rex Junior Roomate

T Rex

13% match
$108.38via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Put T-Rex Junior Roomate after Chaos Custom Shop HPF in the signal chain, where it won't crowd Chaos Custom Shop HPF — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Eventide Modulated Delay

Eventide

12% match

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Keep Chaos Custom Shop HPF's full voice out front: Eventide Modulated Delay goes after Chaos Custom Shop HPF in the signal chain so its modulated voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Dunlop Echoplex Preamp

Dunlop

tonal match
$135via Reverb

Comes later in the signal chain

Dunlop Echoplex Preamp leans smooth right where the bright tone needs it

SolidGoldFX Commodore Breaker Overdrive

Solidgoldfx

tonal match
$152.15via Reverb

Comes earlier in the signal chain

SolidGoldFX Commodore Breaker Overdrive leans smooth right where the bright tone needs it

Dunlop Blue Hippo Optical Tremolo

Dunlop

tonal match

Comes later in the signal chain

Run Dunlop Blue Hippo Optical Tremolo after it and the bright edge settles into something more warm

Strymon Iridium

Strymon

tonal match

Comes later in the signal chain

Where this leans bright, Strymon Iridium answers back warm

Cheaper alternatives

Chaos Custom Shop Sub Sonic Filter

Chaos Custom Shop

71% similarity
$52.77via Reverb

Shared character: filter, mix, bass

BLAXX EQ5B 5-Band Equalizer

Blaxx

47% similarity
$31.35via Reverb

Shared character: mix, bass

Boutique & premium upgrades

Lazy Bear Effects High Pass Filter

Lazy Bear Effects

67% similarity
$90.88via Reverb

Shared character: bass, filter, mix

Chaos Custom Shop Crossover

Chaos Custom Shop

59% similarity
$134.85via Reverb

Shared character: bass

Dirty Haggard Audio Mid-Band

Dirty Haggard Audio

55% similarity
$125via Reverb

Shared character: live, mix, bass

Maxon AF-9 Auto Filter

Maxon

50% similarity
$263.83via Reverb

Shared character: filter, bass

Fishman AFX ProEQMini

Fishman

48% similarity
$291.19via Reverb

Shared character: live, studio

Fairfield Circuitry Long Life

Fairfield Circuitry

48% similarity
$348.39via Reverb

Shared character: filter

Similar character

dpFX Pedals Variable Low Pass Filter

Dpfx Pedals

62% similarity

Shared character: filter, mix, studio

Empress Para EQ DLX

Empress

56% similarity

Shared character: filter, studio, stage

Keeley K-Fil

Keeley

45% similarity

Shared character: filter

Homebrew Electronics HBE Detox EQ Paul Gilbert signature

Homebrew

43% similarity

Shared character: mix, stage

Ivy Pedals Tone Zone

Ivy

41% similarity

Shared character: filter

SB|LB Pedals Freq Boost

SB|LB Pedals

40% similarity

Shared character: mix, stage

See all alternatives to the Chaos Custom Shop HPF (cheaper + boutique) →

Questions people ask

What are good alternatives to the Chaos Custom Shop HPF?+

The closest matches in character are the dpFX Pedals Variable Low Pass Filter, the Empress Para EQ DLX, the Keeley K-Fil. Budget picks: Chaos Custom Shop Sub Sonic Filter, BLAXX EQ5B 5-Band Equalizer. Boutique upgrades: Lazy Bear Effects High Pass Filter, Chaos Custom Shop Crossover, Dirty Haggard Audio Mid-Band.

What pairs well with the Chaos Custom Shop HPF?+

Strong matches from rig and tone-complementarity evidence: Fender Prosonic, Dumble Steel String Singer, Hiwatt Park P18LH 'Little 45' Handwired18W — Fender Prosonic's warm balances out the bright tone.

How much does the Chaos Custom Shop HPF cost?+

Around $69.18 (live listing price, updated Oct 23, 2026).

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