The Univox UD-50 Uni-Drive is an overdrive pedal. Close alternatives include the Maxon OD808 and the Black Country Customs Monolith. It pairs well with the Traynor SB110 and the Peavey MAX 100.

Univox UD-50 Uni-Drive

Unknown brand · pedal

The Univox UD-50 Uni-Drive is a late-1960s/early-1970s Japanese-made overdrive and booster built into a large, treadle-style enclosure resembling a volume pedal rather than a standard stompbox. Built around silicon transistors, it produces a warm yet open, harmonically rich overdrive that stays natural and crunchy at lower settings and turns fuzzy and dense when pushed further, functioning as both a clean boost and a gritty overdrive depending on how hard it drives a tube amp's front end into breakup. It was famously used by Jimi Hendrix during Record Plant studio sessions and by Jimmy Page during Led Zeppelin's early tours.

  • overdrive
  • warm
  • natural
  • studio
  • overtone
  • rich
  • distortion
  • boost

Genres the Univox UD-50 Uni-Drive is commonly used in

Amps that pair well with the Univox UD-50 Uni-Drive

Traynor SB110

Traynor

26% match
$669via Reverb

Traynor SB110 takes that crunchy character and pushes it toward mid-forward

Peavey MAX 100

Peavey

25% match

Stack Peavey MAX 100 on top and a crunchy tone tightens toward mid-forward

Ceriatone HRM 50

Ceriatone

tonal match

Ceriatone HRM 50 pushes a crunchy tone toward mid-forward

Peavey MAX 208

Peavey

tonal match
$432.90via Reverb

Feed a crunchy signal into Peavey MAX 208 and it comes out closer to mid-forward

Ceriatone Overtone Special HRM Bluesmaster 50

Ceriatone

tonal match

Ceriatone Overtone Special HRM Bluesmaster 50 takes that crunchy character and pushes it toward mid-forward

Marshall 2203KK Kerry King JCM800

Marshall

tonal match

Run Marshall 2203KK Kerry King JCM800 after it and the warm edge settles into something more bright

Randall Lynch Box

Randall

tonal match

Randall Lynch Box takes that crunchy character and pushes it toward mid-forward

Díaz CD-100 Amp Head

Diaz

tonal match

Feed a crunchy signal into Díaz CD-100 Amp Head and it comes out closer to mid-forward

Pedals that stack with the Univox UD-50 Uni-Drive

Colorsound Power Boost

Colorsound

25% match

Run Colorsound Power Boost after it and the warm edge settles into something more bright

Fulltone OCD

Fulltone

25% match

What Fulltone OCD brings here leans toward full — that's worth building a pairing around

Wampler Cory Wong

Wampler

18% match
$269.97via Reverb

What Wampler Cory Wong brings here leans toward clean boost — that's worth building a pairing around

Caroline Guitar Company Parabola State Tremolo

Caroline Guitar Company

16% match
$219via Reverb

Run Caroline Guitar Company Parabola State Tremolo after Univox UD-50 Uni-Drive in the signal chain, clear of Univox UD-50 Uni-Drive's own gain stage

Catalinbread Epoch-Set

Catalinbread

11% match
$226.26via Reverb

Run Catalinbread Epoch-Set after Univox UD-50 Uni-Drive in the signal chain, clear of Univox UD-50 Uni-Drive's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Boss DD-200 Digital Delay

Boss

9% match
$246.37via Reverb

Keep Univox UD-50 Uni-Drive's warm voice out front: Boss DD-200 Digital Delay goes after Univox UD-50 Uni-Drive in the signal chain so its analog warmth voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Laney TI-Boost

Laney

tonal match
$146.25via Reverb

Laney TI-Boost's own voicing points at a clean amp's front end, and Univox UD-50 Uni-Drive delivers it

Mooer Flex Boost

Mooer

tonal match
$46.80via Reverb

Univox UD-50 Uni-Drive leans into a clean amp's front end, precisely the platform Mooer Flex Boost wants

Alternativessee all similar tone character →

Maxon OD808

Maxon

74% similarity
$118.63via Reverb

Shared character: hard_rock, true_bypass, boost

Black Country Customs Monolith

Black Country Customs

73% similarity
$119via Reverb

Shared character: pedal, full, hard_rock

Caline CP-14 English Man Distortion

Caline

73% similarity
$34.80via Reverb

Shared character: signal_chain, true_bypass, hard_rock

Fulltone Fulldrive 2 MOSFET

Fulltone

73% similarity
$66via Reverb

Shared character: overdrive_pedals, full, boost

Blackstar HT-Metal

Blackstar

72% similarity
$267.69via Reverb

Shared character: hard_rock, pedal, thickness

Rarebird effects Hatchet Overdrive

Rarebird Effects

72% similarity
$110.02via Reverb

Shared character: overdrive_pedals, hard_rock, pedal

Warm Audios Throne of Tone

Warm Audio

72% similarity

Shared character: true_bypass, pedal, signal_chain

Bixonic Expandora

Bixonic

72% similarity

Shared character: hard_rock, thickness, distortion

Dallas Rangemaster Treble Booster

Dallas

72% similarity
$3558.02via Reverb

Shared character: hard_rock, boost, rich

Catalinbread CB-Overdrive

Catalinbread

71% similarity
$89.99via Reverb

Shared character: pedal, subtle, simple

Amptweaker Fat Rock

Amptweaker

71% similarity

Shared character: hard_rock, pedal, classic_rock

MXR M193 GT-OD Overdrive

MXR

71% similarity

Shared character: hard_rock, subtle, simple

See all alternatives to the Univox UD-50 Uni-Drive (cheaper + boutique) →

Questions people ask

What are good alternatives to the Univox UD-50 Uni-Drive?+

The closest matches in character are the Maxon OD808, the Black Country Customs Monolith, the Caline CP-14 English Man Distortion.

What pairs well with the Univox UD-50 Uni-Drive?+

Strong matches from rig and tone-complementarity evidence: Traynor SB110, Peavey MAX 100, Ceriatone HRM 50 — Traynor SB110 takes that crunchy character and pushes it toward mid-forward.

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Univox UD-50 Uni-Drive — NodeTone