The Electro-Harmonix Micro Q-Tron Envelope Filter is an Electro-Harmonix wah pedal, currently around $77.19. Close alternatives include the Emma DiscomBOBulator and the FTelettronica Envelope Filter. It pairs well with the Bad Cat Cub and the Cornell Romany 10 Tweed 10 watt Tube.

Electro-Harmonix Micro Q-Tron Envelope Filter

Electro-Harmonix · pedal

The Electro-Harmonix Micro Q-Tron is a miniaturized envelope filter pedal delivering auto-wah and funky filter effects triggered by picking attack. Features Q, Volume, and Mode controls with three filter mode selections: Band-Pass Filter (BPF), Low-Pass Filter (LPF), and High-Pass Filter (HPF). The Q control adjusts the resonance and sensitivity of the filter sweep. A smaller, more pedalboard-friendly version of the Q-Tron, suited for funk, soul, R&B, and expressive rock or bass playing.

What stands out

  • “the electro-harmonix micro q-tron is a miniaturized envelope filter pedal delivering auto-wah and funky filter effects triggered by picking attack”

    — from the listing

  • “In the signal chain it benefits from placement before drive pedals for the most responsive envelope tracking”

    — from the community notes

  • “Its standout strength is the three filter modes giving meaningfully different tonal characters from one small enclosure”

    — from the community notes

  • “Strengths: Three filter modes (BPF, LPF, HPF) provide meaningfully different envelope filter characters from classic wah to synth-style resonance”

    — from the reviews

  • “A smaller, more pedalboard-friendly version of the Q-Tron, suited for funk, soul, R&B, and expressive rock or bass playing”

    — from the listing

Trade-offs

  • “the micro q-tron produces classic touch-sensitive envelope filter sweeps ranging from subtle wah-like filtering to extreme resonant quacking”

    — from the community notes

  • filter
  • envelope filter
  • envelope
  • resonance
  • expressive
  • wah
  • dynamic
  • touch

Price updated Oct 23, 2026

Genres the Electro-Harmonix Micro Q-Tron Envelope Filter is commonly used in

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

Amps that pair well with the Electro-Harmonix Micro Q-Tron Envelope Filter

Bad Cat Cub

Bad Cat

22% match

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)

Bad Cat Cub's own harmonically rich character is the real reason this is worth trying

Comes later in the signal chain

Cornell Romany 10 Tweed 10 watt Tube

Cornell

20% match
$1466.72via Reverb

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)

Cornell Romany 10 Tweed 10 watt Tube leans this dynamic tone toward compressed, which it doesn't make on its own

Comes later in the signal chain

Ceriatone British Style 2525

Ceriatone

tonal match

Comes later in the signal chain

Into a dynamic tone, Ceriatone British Style 2525 brings a pull toward compressed that's missing

Vox AC30S1 OneTwelve 30W 1x12 Combo

Vox

tonal match

Comes later in the signal chain

Into a dynamic tone, Vox AC30S1 OneTwelve 30W 1x12 Combo brings a pull toward compressed that's missing

Fryette Power Station 100

Fryette

tonal match
$1199via Reverb

Comes later in the signal chain

Fryette Power Station 100 leans this dynamic tone toward compressed, which it doesn't make on its own

Kustom HV30 Tube

Kustom

tonal match
$234.52via Reverb

Comes later in the signal chain

Kustom HV30 Tube leans this dynamic tone toward compressed, which it doesn't make on its own

Mesa/Boogie Stiletto Deuce Stage II

Mesa Boogie

tonal match
$1147.50via Reverb

Comes later in the signal chain

Mesa/Boogie Stiletto Deuce Stage II leans this dynamic tone toward compressed, which it doesn't make on its own

Friedman PT-20

Friedman

tonal match
$1499via Reverb

Comes later in the signal chain

Friedman PT-20 leans this dynamic tone toward compressed, which it doesn't make on its own

Pedals that stack with the Electro-Harmonix Micro Q-Tron Envelope Filter

Origin Effects RevivalDrive

Origin Effects

21% match

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)

Into a dynamic tone, Origin Effects RevivalDrive brings a pull toward compressed that's missing

Comes later in the signal chain

Dunlop MXR Distortion Plus

Dunlop

20% match

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain. (dynamic → compressed)

Dunlop MXR Distortion Plus leans this dynamic tone toward compressed, which it doesn't make on its own

Comes later in the signal chain

JHS Lucky Cat Delay limited edition

JHS Pedals

10% match
$281.42via 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.

Run JHS Lucky Cat Delay limited edition after Electro-Harmonix Micro Q-Tron Envelope Filter in the signal chain, where it won't crowd Electro-Harmonix Micro Q-Tron Envelope Filter — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Meris LVX Delay

Meris

5% match

Keep Electro-Harmonix Micro Q-Tron Envelope Filter's dynamic voice out front: Meris LVX Delay goes after Electro-Harmonix Micro Q-Tron Envelope Filter in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

DigiTech DOD Compressor 280

Digitech

tonal match
$119.23via Reverb

Comes later in the signal chain

DigiTech DOD Compressor 280 leans this dynamic tone toward compressed, which it doesn't make on its own

DigiTech XBS Bass Squeeze

Digitech

tonal match
$95.94via Reverb

Comes later in the signal chain

DigiTech XBS Bass Squeeze leans this dynamic tone toward compressed, which it doesn't make on its own

Fairfield Circuitry 20% More

Fairfield Circuitry

tonal match
$451.45via Reverb

Comes later in the signal chain

Fairfield Circuitry 20% More leans this dynamic tone toward compressed, which it doesn't make on its own

Tech 21 CompTortion

Tech 21

tonal match

Comes later in the signal chain

Into a dynamic tone, Tech 21 CompTortion brings a pull toward compressed that's missing

Cheaper alternatives

Boutique & premium upgrades

Similar charactersee all similar tone character →

See all alternatives to the Electro-Harmonix Micro Q-Tron Envelope Filter (cheaper + boutique) →

Questions people ask

What are good alternatives to the Electro-Harmonix Micro Q-Tron Envelope Filter?+

The closest matches in character are the Emma DiscomBOBulator, the FTelettronica Envelope Filter, the Behringer B-Tron III Envelope Filter. Budget picks: Demon FX Pearl White Auto Wah, The Next Sound CH-05 Auto Wah, Maestro Agena. Boutique upgrades: Carl Martin Ottawa, Carl Martin Ottawa Vintage Optical Envelope Auto-Wah/Envelope Filter, Electro-Harmonix Q-Tron Plus.

What pairs well with the Electro-Harmonix Micro Q-Tron Envelope Filter?+

Strong matches from rig and tone-complementarity evidence: Bad Cat Cub, Cornell Romany 10 Tweed 10 watt Tube, Ceriatone British Style 2525 — Bad Cat Cub's own harmonically rich character is the real reason this is worth trying.

How much does the Electro-Harmonix Micro Q-Tron Envelope Filter cost?+

Around $77.19 (live listing price, updated Oct 23, 2026).

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