boredbrain/xcelon

Xcelon

Boredbrain Music

An all-analog six-channel stereo audio mixer for eurorack modular systems with extensive CV control, dual mix busses, FX sends/returns, and expansion ports.1150

Capabilities 3

Stereo Mixerstereo-mixer
Six-channel all-analog stereo mixer with two mix busses, two FX send/return pairs, and 26 CV inputs.1150
Voltage-Controlled Amplifiervca
Each channel's volume circuit can be switched to VCA mode via a rear jumper, allowing an envelope patched into VOL CV to control channel volume while the fader attenuates.1150
Voltage-Controlled Crossfadercrossfader
Each channel has an XFADE button that enables dual-mono crossfade mode, turning the BAL knob into a crossfader between the two mono inputs.1150

Jacks 50 (42 in / 8 out)

NameSignalVoltageDescription
Inputs (42)
CH1 BAL CVcv-5V to 5V1150
CH1 FX1 CVcv0V to 5V1150
CH1 FX2 CVcv0V to 5V1150
CH1 INPUT 1audio—Left stereo audio input for channel 1; normalled from left to right when right jack is unpatched.1150
CH1 INPUT 2audio—Right stereo audio input for channel 1; normalled from left when unpatched.1150
CH1 VOL CVcv0V to 5V1150
CH2 BAL CVcv-5V to 5V1150
CH2 FX1 CVcv0V to 5V1150
CH2 FX2 CVcv0V to 5V1150
CH2 INPUT 1audio—1150
CH2 INPUT 2audio—1150
CH2 VOL CVcv0V to 5V1150
CH3 BAL CVcv-5V to 5V1150
CH3 FX1 CVcv0V to 5V1150
CH3 FX2 CVcv0V to 5V1150
CH3 INPUT 1audio—1150
CH3 INPUT 2audio—1150
CH3 VOL CVcv0V to 5V1150
CH4 BAL CVcv-5V to 5V1150
CH4 FX1 CVcv0V to 5V1150
CH4 FX2 CVcv0V to 5V1150
CH4 INPUT 1audio—1150
CH4 INPUT 2audio—1150
CH4 VOL CVcv0V to 5V1150
CH5 BAL CVcv-5V to 5V1150
CH5 FX1 CVcv0V to 5V1150
CH5 FX2 CVcv0V to 5V1150
CH5 INPUT 1audio—1150
CH5 INPUT 2audio—1150
CH5 VOL CVcv0V to 5V1150
CH6 BAL CVcv-5V to 5V1150
CH6 FX1 CVcv0V to 5V1150
CH6 FX2 CVcv0V to 5V1150
CH6 INPUT 1audio—1150
CH6 INPUT 2audio—1150
CH6 VOL CVcv0V to 5V1150
FX RTN1 Laudio—Left stereo FX return 1 input; can also be used as an extra stereo input.1150
FX RTN1 Raudio—1150
FX RTN2 Laudio—1150
FX RTN2 Raudio—1150
RTN1 CVcv0V to 5V1150
RTN2 CVcv0V to 5V1150
Outputs (8)
FX SND1 Laudio—Left output of FX send 1 stereo submix; if only left is used, right signals are summed into it.1150
FX SND1 Raudio—1150
FX SND2 Laudio—1150
FX SND2 Raudio—1150
MIX OUT A Laudio—1150
MIX OUT A Raudio—1150
MIX OUT B Laudio—1150
MIX OUT B Raudio—1150

Parameters 54

NameTypeRangeBehavior
CH1 ABswitch—Three-position switch routing the channel to mix bus A only, both A and B, or mix bus B only.1150
CH1 BALknob—Adjusts the balance of the two channel inputs using a -4.5 dB pan law curve; in XFADE mode acts as a mono crossfader between the two signals.1150
CH1 FX SND 1 jumperjumper—When POST, the FX send 1 level is affected by the channel volume fader. When PRE, the send level is independent of fader position.1150
CH1 FX1knob—Sends an adjustable amount of the channel signal to the shared FX SND 1 bus; post-fader by default, configurable pre-fader via jumper.1150
CH1 FX2knob—Sends an adjustable amount of the channel signal to the shared FX SND 2 bus; post-fader by default.1150
CH1 GAINknob≤15dBBoosts the channel input signal up to +15 dB; a LINE position handles line-level sources. A red PK LED illuminates just before clipping.1150
CH1 MUTEbutton—Silences the channel with up to -93 dB attenuation; VCA-based latching circuit with fast slew eliminates clicks and pops.1150
CH1 VOLfader—1150
CH1 VOL CV jumperjumper—In MOD mode, VOL CV is summed with the fader bias to modulate volume. In VCA mode, VOL CV replaces the bias voltage and the fader attenuates the CV signal.1150
CH1 VU METER jumperjumper—When POST, the VU meter is affected by the channel volume fader. When PRE, the meter is not affected by fader position.1150
CH1 XFADEbutton—Puts the channel in dual-mono mode: both inputs are centered and BAL becomes a crossfader between the two signals.1150
CH2 ABswitch—1150
CH2 BALknob—1150
CH2 FX1knob—1150
CH2 FX2knob—1150
CH2 GAINknob≤15dB1150
CH2 MUTEbutton—1150
CH2 VOLfader—1150
CH2 XFADEbutton—1150
CH3 ABswitch—1150
CH3 BALknob—1150
CH3 FX1knob—1150
CH3 FX2knob—1150
CH3 GAINknob≤15dB1150
CH3 MUTEbutton—1150
CH3 VOLfader—1150
CH3 XFADEbutton—1150
CH4 ABswitch—1150
CH4 BALknob—1150
CH4 FX1knob—1150
CH4 FX2knob—1150
CH4 GAINknob≤15dB1150
CH4 MUTEbutton—1150
CH4 VOLfader—1150
CH4 XFADEbutton—1150
CH5 ABswitch—1150
CH5 BALknob—1150
CH5 FX1knob—1150
CH5 FX2knob—1150
CH5 GAINknob≤15dB1150
CH5 MUTEbutton—1150
CH5 VOLfader—1150
CH5 XFADEbutton—1150
CH6 ABswitch—1150
CH6 BALknob—1150
CH6 FX1knob—1150
CH6 FX2knob—1150
CH6 GAINknob≤15dB1150
CH6 MUTEbutton—1150
CH6 VOLfader—1150
CH6 XFADEbutton—1150
RTN ABswitch—Shared switch routing both FX returns to mix bus A, both, or mix bus B.1150
RTN1knob—1150
RTN2knob—1150

Firmware history 0 versions

No firmware history recorded.

References 1

  1. [1150]
    Boredbrain Xcelon User Guidemanual
    source 1150 canonical ↗ archived ↗
    ● verified 2026-06-07