QMX4.1 Rackmount DJ Mixer
172.790UK
19” Rackmount (4U)
4 Channel, 8 Input
Dj Mic with 2-band EQ & Talkover on combo input
Switchable Line/Phono inputs on Channels 1 + 2
Dual 10 LED VU meters
Channel 4 switchable to Mic 2
Replaceable cross-fader for channels 1 + 2
Cue select and level controls for monitoring
Mains powered via IEC connector
Thank you for purchasing the QTX Sound QMX4.1 Rackmount DJ Mixer.
This product is intended to give long term, reliable service in normal usage.
Please read these instructions before use to avoid incorrect operation and to
help outline the functions and controls.
(1) MICROPHONE - Combo XLR and 6.3mm jack DJ mic input
(2) BASS & TREBLE - adjust 2-band EQ for DJ microphone
(3) INPUT SELECTOR, CHANNEL 1 - selects Phono or Line input
(4) INPUT SELECTOR, CHANNEL 2 - selects Phono or Line input
(5) INPUT SELECTOR, CHANNEL 3 - selects Aux (line) or Line input
(6) INPUT SELECTOR, CHANNEL 4 - selects Mic 2 or Line input
(7) MASTER LEVEL - adjusts the level on the main RCA outputs
(8) CUE SELECT - selects which input is routed to the monitor headphones
(9) POWER SWITCH - switches mains power on/off
(10) TALKOVER - switches a preset drop in music volume for announcements
(11) MIC-1 FADER - adjusts level of DJ microphone
(12) CH1 - CH4 FADERS - channel faders to mix and fade in/out music levels
(13) CROSSFADER - fades between outputs of CH1 and CH2
(14) CUE LEVEL - adjusts level to monitor headphones
(15) HEADPHONES OUTPUT - stereo 6.3mm jack output for headphones
(16) IEC MAINS INLET - connect to mains using supplied IEC lead
(17) MAINS FUSE - to replace fuse, disconnect mains & open with screwdriver
(18) MASTER - RCA main outputs L+R. Connect to amplifier / active speakers
(19) REC - RCA recording outputs. Line output unaffected by MASTER LEVEL
(20) LINE - RCA line input for channel 4
(21) MIC - 6.3mm mono jack input for MIC 2 option on channel 4
(22) LINE - RCA line input for channel 3
(23) AUX - Auxiliary RCA line input for channel 3
(24) LINE - RCA line input for channel 2
(25) PHONO - RCA phono RIAA input for turntable on channel 2
(26) LINE - RCA line input for channel 1
(27) PHONO - RCA phono RIAA input for turntable on channel 1
(28) EARTH - grounding point to earth turntables to case
Check mains for correct voltage as indicated near to the IEC mains inlet on the
rear panel. Connect to mains supply using the IEC cable provided.
Connect the MASTER RCA outputs to amplifier, active speakers or recording
device and ensure that the volume levels are turned down to avoid damage.
Connect any turntables to the RCA PHONO inputs on ch.1 and ch.2.
Earth turntables to the case earth point on the rear panel
Connect CD, DVD, MP3 players etc. to the LINE or AUX inputs.
Connect DJ mic to the top panel combi socket and mic 2 to the MIC jack on ch.4
Connect headphones to the HEADPHONE jack
With MASTER LEVEL down, switch the power on.
Gradually increase MASTER LEVEL and channel levels to check input signals.
Be aware that the CROSSFADER also operates across ch.1 and ch.2
Monitor each channel via headphones selecting using the CUE SELECT switch
Check DJ mic level and adjust BASS and TREBLE where necessary
NO OUTPUT -
Check mains power is on
Check leads and connections
Check MASTER LEVEL and mic or channel fader is turned up
Check CROSSFADER is in the centre position
DISTORTED OUTPUT -
Check line input isn't connected to PHONO
Check channel and MASTER faders are not too high
Check volume control of amplifier, active speakers or recording equipment
TOO QUIET -
Check turntable is not connected to line input
Check channel and MASTER faders are not too low
Check for volume control on sound source
No user serviceable parts inside, refer all servicing issues to qualified service personnel. Clean
with a lint-free dry or slightly damp cloth. To replace crossfader, disconnect mains and undo the 2
securing screws, lift the crossfader and disconnect from the in-line connector (noting the correct
orientation. Connect the new crossfader, reposition and secure with the 2 screws.
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