The Two-Rock Bi-Onyx 50W Head is a Two-Rock amplifier. Close alternatives include the Two-Rock Gain Master 50 Head and the Mooer Micro PreAmp 010 (Two Rock Coral). It pairs well with the Colorsound Overdriver and the Cusack Music Tap-A-Fuzz.

Two-Rock Bi-Onyx 50W Head

Two-Rock · amplifier

The Two-Rock Bi-Onyx is a dual-channel amplifier designed to give two-channel players a greater degree of independent control than the company's earlier designs, with fully separate controls for the clean and lead channels including EQ, gain, master, reverb, contour and volume boost. Because nothing is shared between the channels, the clean and lead voices can be set completely independently rather than compromising around a common tone stack. It is offered as a 50 or 100 watt head with EL34 output tubes as standard and 6L6 as an option, the EL34s giving a more British midrange character than the 6L6 amps in the Two-Rock range. Channel selection and volume boost are footswitchable. It suits players who need two genuinely distinct sounds from one amplifier.

What stands out

  • “the two-rock bi-onyx is a dual-channel amplifier designed to give two-channel players a greater degree of independent control than the company”

    — from the listing

  • “the el34s giving a more british midrange character than the 6l6 amps in the two-rock range”

    — from the listing

  • “It is expensive, heavy, and voiced for pristine cleans and smooth gain”

    — from the reviews

  • “Bought specifically for the independent channel control, which is the feature that distinguishes it within the Two-Rock line and the reason it appears in dual-sound rigs”

    — from the community notes

  • “Footswitchable volume boost is regularly mentioned as practical for solos”

    — from the community notes

  • rock
  • british
  • smooth
  • boost
  • gain
  • headroom
  • pedal platform
  • tube

Good for

  • Live
  • Studio

Genres the Two-Rock Bi-Onyx 50W Head is commonly used in

  • Rock
  • Blues
  • Soul
  • Blues Rock
    citedInferred from shared tonal signals, not a stated genre tag.
  • Classic Rock
    citedInferred from shared tonal signals, not a stated genre tag.
  • Alternative
    citedInferred from shared tonal signals, not a stated genre tag.

Pedals that stack with the Two-Rock Bi-Onyx 50W Head

Colorsound Overdriver

pedal

21% match

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → fuzzy)

Run Colorsound Overdriver into that high headroom platform and it finally leans toward fuzzy

Goes in front of the amp

Cusack Music Tap-A-Fuzz

Cusack Music

19% match
$249via Reverb

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → fuzzy)

The high headroom tone has headroom to spare — Cusack Music Tap-A-Fuzz leans it toward fuzzy to fill it in

Goes in front of the amp

Catalinbread Katzenkonig

Catalinbread

19% match

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → fuzzy)

Into a high headroom tone, Catalinbread Katzenkonig brings a pull toward fuzzy that's missing

Goes in front of the amp

Universal Audio 1176 Compressor

Universal Audio

12% match
$129via Reverb

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

What Universal Audio 1176 Compressor brings here leans toward compressed — that's worth building a pairing around

Goes in front of the amp

Boss BF-2 Flanger

Boss

12% match
$100via 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.

Boss BF-2 Flanger's lush voice goes after Two-Rock Bi-Onyx 50W Head in the signal chain — it's not there to compete with Two-Rock Bi-Onyx 50W Head's own smooth character

Goes in front of the amp

Electro-Harmonix Canyon

Electro-Harmonix

6% 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.

Put Electro-Harmonix Canyon in Two-Rock Bi-Onyx 50W Head's effects loop, clear of Two-Rock Bi-Onyx 50W Head's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

Electro-Harmonix Memory Boy Analog Delay

Electro-Harmonix

6% match
$104.76via 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.

Keep Two-Rock Bi-Onyx 50W Head's smooth voice out front: Electro-Harmonix Memory Boy Analog Delay goes in Two-Rock Bi-Onyx 50W Head's effects loop so its analog warmth voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

Electro-Harmonix EH-1335/EH-3075 Hot Tubes

Electro-Harmonix

tonal match

Goes in front of the amp

Electro-Harmonix EH-1335/EH-3075 Hot Tubes's own voicing points at a clean amp's front end, and Two-Rock Bi-Onyx 50W Head delivers it

Alternativessee all similar tone character →

Two-Rock Gain Master 50 Head

Two-Rock

76% similarity
$3875.37via Reverb

Shared character: rich harmonic content, benchmark, glassy

Mooer Micro PreAmp 010 (Two Rock Coral)

Mooer

72% similarity
$52.77via Reverb

Mooer Micro PreAmp 010 (Two Rock Coral) recreates this amp's tone in pedal form

Xotic Bass BB Preamp V1.5

Xotic

72% similarity
$199via Reverb

Xotic Bass BB Preamp V1.5 recreates this amp's tone in pedal form

DSM Silver Linings Drive Preamp Engine

Dsm Humboldt Electronics

72% similarity
$229via Reverb

DSM Silver Linings Drive Preamp Engine recreates this amp's tone in pedal form

Rowin LEF-315 Dumbler Amp Sim

Rowin

72% similarity
$31.90via Reverb

Rowin LEF-315 Dumbler Amp Sim recreates this amp's tone in pedal form

Two-Rock Classic Reverb 100W Head

Two-Rock

65% similarity
$5299via Reverb

Shared character: rich harmonic content, benchmark, glassy

Fender Twin Reverb Head

amplifier

52% similarity
$639.06via Reverb

Shared character: glassy, headroom, gain

Matchless Clubman 35

amplifier

50% similarity

Shared character: glassy, clean

Mesa Boogie Lone Star Head

amplifier

48% similarity
$1666via Reverb

Shared character: smooth, reverb, clean

Blackstar St. James 50 EL34H Fawn

Blackstar

46% similarity

Shared character: glassy, boost, clean

Dumble Overdrive Reverb

Dumble

44% similarity

Shared character: singing, headroom, smooth

DV Mark Raw Dawg EG

Dv Mark

44% similarity
$492.49via Reverb

Shared character: reverb, clean

See all alternatives to the Two-Rock Bi-Onyx 50W Head (cheaper + boutique) →

Questions people ask

What are good alternatives to the Two-Rock Bi-Onyx 50W Head?+

The closest matches in character are the Two-Rock Gain Master 50 Head, the Mooer Micro PreAmp 010 (Two Rock Coral), the Xotic Bass BB Preamp V1.5.

What pairs well with the Two-Rock Bi-Onyx 50W Head?+

Strong matches from rig and tone-complementarity evidence: Colorsound Overdriver, Cusack Music Tap-A-Fuzz, Catalinbread Katzenkonig — Run Colorsound Overdriver into that high headroom platform and it finally leans toward fuzzy.

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