The Old Blood Noise Endeavors BL-37 is an Old Blood Noise Endeavors reverb pedal, currently around $179. Close alternatives include the Fjord Fuzz Mime and the Death By Audio Reverberation Machine. It pairs well with the Matchless DC-30 and the Vox AC30 Guitar Combo Amp.
Old Blood Noise Endeavors BL-37
Old Blood Noise Endeavors · pedal
The Old Blood Noise Endeavors BL-37 Reverb is a variable-clock reverb in the brand's BL series, adding modulation at two points in the reverb trail to create a wandering, lush, ever-shifting ambience with a simplified control set. Its signature feature is the Clock slider, which moves the sound from a quick, bright, tile-bathroom echo to a dark, lo-fi, time-stretched reverb, giving immediate, tactile control over fidelity and character. The dual modulation keeps the tails moving and organic rather than static, making it well suited to ambient, shoegaze, and experimental playing where evolving texture matters more than a clean room sound. It rewards keeping a thumb on the slider to morph the reverb in real time, offering a distinctive, characterful take on modulated reverb.
- reverb
- echo
- lush
- bright
- ambient
- dark
- experimental
- organic
Good for
- Live
- Studio
- Worship
Price updated Aug 27, 2026
Genres the Old Blood Noise Endeavors BL-37 is commonly used in
- Ambient
- Experimental
- Shoegaze
- Post Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Lo Fi
cited
Inferred from shared tonal signals, not a stated genre tag. - Indie
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Old Blood Noise Endeavors BL-37
Matchless DC-30
Matchless
29% matchMatchless DC-30 leans glassy right where the dark tone needs it
Vox AC30 Guitar Combo Amp
Vox
28% matchWhere this leans dark, Vox AC30 Guitar Combo Amp answers back bright
Dr. Z Amplification Z-Wreck Head
amplifier
tonal matchRun Dr. Z Amplification Z-Wreck Head after it and the dark edge settles into something more glassy
Blackstar HT Club 40
Blackstar
tonal matchBlackstar HT Club 40 leans glassy right where the dark tone needs it
Bad Cat Hot Cat 50 Mod Shop Combo
Bad Cat
tonal matchBad Cat Hot Cat 50 Mod Shop Combo's high gain fills in what this transparent tone doesn't make on its own
Bad Cat Jet Black
Bad Cat
tonal matchBad Cat Jet Black leans glassy right where the dark tone needs it
Marshall Haze Head 15
Marshall
tonal matchRun Marshall Haze Head 15 after it and the dark edge settles into something more glassy
Bad Cat Hot Cat 45-Watt
Bad Cat
tonal matchBad Cat Hot Cat 45-Watt leans bright right where the dark tone needs it
Pedals that stack with the Old Blood Noise Endeavors BL-37
EarthQuaker Devices '- Speaker Cranker
EarthQuaker Devices
25% matchWhere this leans dark, EarthQuaker Devices '- Speaker Cranker answers back bright
Electronic Audio Experiments Surveyor V2.5
Electronic Audio Experiments
24% matchElectronic Audio Experiments Surveyor V2.5's bright balances out the dark tone
Ibanez FL-9 Flanger
Ibanez
24% matchKeep Ibanez FL-9 Flanger after Old Blood Noise Endeavors BL-37 in the signal chain, clear of Old Blood Noise Endeavors BL-37's own gain stage
Wampler Latitude Deluxe Tremolo
Wampler
22% matchPut Wampler Latitude Deluxe Tremolo after Old Blood Noise Endeavors BL-37 in the signal chain, clear of Old Blood Noise Endeavors BL-37's own gain stage
Tone City Dry Martini
Tone City
tonal matchTone City Dry Martini is voiced for a clean amp's front end — Old Blood Noise Endeavors BL-37 gives it exactly that
Ashdown Geezer Butler Signature
Ashdown
tonal matchOld Blood Noise Endeavors BL-37 leans into a clean amp's front end, precisely the platform Ashdown Geezer Butler Signature wants
Beetronics OV-LE-Uva
Beetronics
tonal matchBeetronics OV-LE-Uva is voiced for a clean amp's front end — Old Blood Noise Endeavors BL-37 gives it exactly that
ProCo RAT 2
Proco
tonal matchInto Old Blood Noise Endeavors BL-37, ProCo RAT 2 is right at home: it's built around a clean amp's front end
Cheaper alternatives
TC Electronic Hall of Fame Reverb
TC Electronic
70% similarityShared character: ambient, reverb, natural
Mooer woodverb
Mooer
69% similarityShared character: ambient, bright, reverb
Electro-Harmonix Holy Grail Nano
Electro-Harmonix
69% similarityShared character: ambient, reverb, natural
EarthQuaker Devices Levitation V2
EarthQuaker Devices
66% similarityShared character: bright, ambient, reverb
Walrus Audio Fundamental Ambient
Walrus Audio
96% similaritysimilar tone character
Boss TE-2
Boss
94% similaritysimilar tone character
Boutique & premium upgrades
Old Blood Noise Endeavors Dark Star V3
Old Blood Noise Endeavors
70% similarityShared character: dark, noise, ambient
Old Blood Noise Endeavors Obne Dark Star
Old Blood Noise Endeavors
69% similarityShared character: dark, noise, ambient
Death By Audio Dream Station
Death By Audio
64% similarityShared character: modulation, reverb
Hungry Robot The Borderland Modulated Ambient Reverb
Hungry Robot
95% similaritysimilar tone character
Walrus Audio Slöer Stereo Reverb
Walrus Audio
95% similaritysimilar tone character
EarthQuaker Devices Towers
EarthQuaker Devices
95% similaritysimilar tone character
Similar charactersee all similar tone character →
Fjord Fuzz Mime
Fjord Fuzz
69% similarityShared character: dark, bright, reverb
Death By Audio Reverberation Machine
Death By Audio
69% similarityShared character: dark, bright, reverb
Keeley Luna
Keeley
69% similarityShared character: experimental_playing, ambient, reverb
Laney Secret Path
Laney
68% similarityShared character: dark, ambient, bright
Old Blood Noise Endeavors Procession V2
Old Blood Noise Endeavors
95% similaritysimilar tone character
Walrus Audio Slö
Walrus Audio
94% similaritysimilar tone character
See all alternatives to the Old Blood Noise Endeavors BL-37 (cheaper + boutique) →
Questions people ask
What are good alternatives to the Old Blood Noise Endeavors BL-37?+
The closest matches in character are the Fjord Fuzz Mime, the Death By Audio Reverberation Machine, the Keeley Luna. Budget picks: TC Electronic Hall of Fame Reverb, Mooer woodverb, Electro-Harmonix Holy Grail Nano. Boutique upgrades: Old Blood Noise Endeavors Dark Star V3, Old Blood Noise Endeavors Obne Dark Star, Death By Audio Dream Station.
What pairs well with the Old Blood Noise Endeavors BL-37?+
Strong matches from rig and tone-complementarity evidence: Matchless DC-30, Vox AC30 Guitar Combo Amp, Dr. Z Amplification Z-Wreck Head — Matchless DC-30 leans glassy right where the dark tone needs it.
How much does the Old Blood Noise Endeavors BL-37 cost?+
Around $179 (live listing price, updated Aug 27, 2026).
Compare
- vs Walrus Audio Fundamental Ambient
- vs Hungry Robot The Borderland Modulated Ambient Reverb
- vs Walrus Audio Slöer Stereo Reverb