AU-0207
Closed back
Series 01
Monitor C
A closed-back reference headphone for tracking. 32 dB of passive isolation, so the click never reaches the mic.
Weight
342 g
Driver
50 mm
Rated
5 Hz–40 kHz
London · 51.5072° N
Build AU-0207
Release 02 / 27
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Aural builds headphones on the border between listening and measuring.
Every pair is tuned against its own frequency curve, not a target someone else drew. Monitor 01 was built for people who mix, master and listen for a living — where hearing the truth is the job.
System
Monitor 01
Models
04
Release
02 / 27
Status
Live
Monitor 01 — Studio Line
Four pieces, one acoustic system. Each unit is issued with its own measurement sheet — nothing on it is decoration.
AU-0215
Open back
Series 01
Monitor O
The mixing model: open grille, wider stage and a flat curve that makes bad mixes obvious.
Weight
298 g
Driver
50 mm
Rated
4 Hz–42 kHz
AU-0228
Field
Series 01
Field X
Folding, sealed and wireless when you want it to be. Built for location recordists and long flights.
Weight
265 g
Battery
40 h
Rated
IP54
AU-0233
Interface
Series 01
Signal Dock
A headphone amplifier and DAC in one machined block. One knob, two outputs, no app.
Weight
480 g
Output
1.2 W @ 32 Ω
Rated
32-bit
Read the grille
The grille does three jobs at once. The markers show what each layer is for — nothing on it is there to look expensive.
Pointer / Inspect
2.4× optical
Micro-perforation
0.4 mm · 38 % open
Damping layer
Felt · 0.8 mm
Diaphragm
Bio-cellulose · 50 mm
Grille
Aluminium · anodised
Pads
Protein leather · memory foam
Cable
OFC · 3 m · detachable
04
Field test
Four hundred studio hours
Monitor 01 was used, not photographed, on forty records across London. Tracking, mixing, mastering, night buses home. What follows is what survived.
Test period
90 days
Sessions
412 h
Engineers
16
Reported failures
00
Fig. 04 — Studio B · 02:14 GMT
Monitor C — AU-0207
Issued specification for the closed-back reference. Every value below is measured, not estimated.
50 mm bio-cellulose · neodymium
5 Hz – 40 kHz
32 Ω
104 dB/mW
< 0.05 % @ 1 kHz, 100 dB
32 dB passive
Machined aluminium · steel band
342 g without cable
Replaceable pads · no solvents
We did not want another headphone that sounds impressive. We wanted one that sounds correct at 3 am.
Theo Marsh
Founder · London
Aural started above a rehearsal room in Hackney, with an oscilloscope, a lathe and a disagreement about what a monitor owes its engineer. Nothing has been outsourced since.
Fig. 06 — Studio
Notes from the test
Short entries written during the sessions. No conclusions, just what happened.
Studio A · 11:20 GMT
Bass is a liar
Rooms add bass that is not on the record. We tuned until mixes translated to a car without a second pass.
Live room · 22:40 GMT
The click must stay home
Drummers track with the click loud. Isolation became the first spec, not the last.
Workshop · 09:05 GMT
Nothing here is decorative
Every line on the housing is a vent, a seam or a screw. If a detail could not explain itself, it did not ship.
Access — Monitor 01
Issued once, in one batch.
500 units, assembled in London, released 02 / 27. Registration closes when the batch is allocated — there is no restock and no second finish.
500 units
Ships 02 / 27
Made in London