Interactive visual guide to colors, controls, and settings
Verified against the Chord Mojo 2 User Manual v1.1
Select your headphones
Beyerdynamic DT 1990 Pro
250 ohms · 102 dB/mW · Open-back studio reference
Orientation
The four buttons
Everything on the Mojo 2 happens with these four LED buttons. Each one glows a color that tells you something different. Learn what each one means and the whole device stops being mysterious.
Power
Input sample rate
Menu
Cycles through modes
Volume −
Level / cut
Volume +
Level / boost
Power Button
What sample rate is playing
The Power button glows a color that tells you the resolution of the music feeding the Mojo. You don't control this — it just reports what your source is sending. Red means CD quality, blue means hi-res.
Red
44.1 kHz — CD quality
Orange
48 kHz
Yellow
88.2 kHz
Green
96 kHz
Light Blue
176.4 kHz
Blue
192 kHz
Magenta
352.8 / 384 kHz
Purple
705.6 / 768 kHz
White
DSD
DSP Equalisation
The four tone controls
The Mojo 2's DSP has four frequency bands you can boost or cut by up to ±9 dB. Each band is identified by the Menu button's color. Volume + adds lift, Volume − adds cut. Settings save automatically and persist through power cycles.
Red
20 Hz
Lower bass — sub-bass rumble and low-end weight. Tapers off by 125 Hz.
Yellow
125 Hz shelf
Mid-bass — body, warmth, the punch of kick drums and bass guitars.
Green
3 kHz shelf
Lower treble — vocal presence, snare crack, the 1990's known peak region.
Light Blue
20 kHz
Upper treble — air, shimmer, cymbal sheen. Swells toward the top of the range.
Note: The full Menu cycle is: Grey (Volume range) → Blue (Brightness/Crossfeed) → Red → Yellow → Green → Light Blue → Magenta (Lock). So the first EQ band is two Menu presses from the start.
For the DT 1990 Pro
Recommended starting point
The 1990 Pro is analytical and treble-forward, with a known rising response in the upper mids/lower treble that can get fatiguing on bright recordings. These settings add warmth and tame the edge without killing the detail retrieval that makes the 1990s what they are.
Starting DSP Configuration
Quick reset: The fastest way to reset all DSP to flat is to enter any EQ band, then press Vol + and Vol − simultaneously. Resets all four bands and Crossfeed in one action.
Step by Step
How to actually set it
Each press of Volume + or Volume − changes the selected band by 1 dB. Count your presses. The volume buttons will change color to reflect the chosen level.
Tip: Listen for about a week before adjusting. Your ears adapt, and you'll start to hear whether the cut wants to be −2 dB or the bass wants more body. Make one change at a time.
Menu Map
Full Menu cycle
Each press of Menu advances through these modes in order. Lift your finger between presses to see which color/mode you're on.
Start
Volume
Normal mode
Press 1
Brightness
& Crossfeed
Press 2
Bass 20 Hz
Lower bass
Press 3
Bass 125 Hz
Mid-bass shelf
Press 4
Treble 3 kHz
Lower treble shelf
Press 5
Treble 20 kHz
Upper treble
Press 6
Lockdown
Travel lock
Volume Buttons
How loud is loud
Instead of numbers, the Mojo shows volume as a color spectrum. Both volume buttons glow the same color to indicate current level. The Menu button shows the volume range: unlit for low, white for high.
Dark Blue
Very quiet
Light Blue / Cyan
Quiet
Green
Low-medium
Yellow
Normal listening
Orange
Loud
Red
Very loud — limit exposure
Magenta / White
Maximum — hearing risk
For the DT 1990 Pro: Comfortable listening usually lands in the green to yellow range. Open-back, 250 ohm headphones need real voltage.
Cheat Sheet
Hidden shortcuts & references
Mute
Press Vol + and Vol − simultaneously. Menu button pulses. Press again to unmute.
Factory Reset
From any DSP band or Crossfeed menu, press Vol + and Vol − simultaneously. Resets DSP to flat and Crossfeed off.
Crossfeed
Press Menu once (Blue), then Vol + to cycle: Off → Red (minimum) → Green (moderate) → Blue (maximum). Useful for older hard-panned stereo recordings.
Brightness
Press Menu once (Blue), then Vol − to toggle between Normal and Low brightness.
Lockdown Mode
Press Menu six times to Magenta, then Vol + and Vol − together. Disables all controls for travel. Repeat to unlock.
Auto-shutdown
Device powers off after 10 minutes with no input signal.
Exit Menu
Press and hold Menu to exit immediately, or wait 10 seconds for auto-exit.
Charging LED
Blue = 75–100% · Green = 40–75% · Yellow = 10–40% · Red = 2–10% · Magenta/Purple = Desktop Mode
Audio Inputs
USB-C (data), Micro-USB (data), coaxial (3.5mm), optical. Priority: USB → Coax → Optical. Micro-USB takes priority over USB-C if both connected.
DSP Memory
All DSP and Crossfeed settings persist through power cycles. Only one profile stored — manually adjust when switching headphones.