MM81 - Blender Qtx - Free user manual and instructions

Product Type	Mini Audio Mixer
Model	MM81
Brand	QTX
Input Impedance	3.3k Ohms
Inputs	8 x 6.3mm jack (microphone level)
Outputs	1 x 6.3mm jack (mono)
Weight	621g (without battery)
Dimensions	150 x 108 x 64mm
Power Supply	9V battery (PP3 included) or optional 12Vdc 200mA adaptor
Output Level	+4dB nominal (+8dB max)
Output Impedance	600 Ohms
Controls	Master volume, 8 channel volumes, power switch
Indicators	Power LED (green), Clip LED (red)
Connectors	6.3mm jack (all inputs and output)
Battery Life	Varies with usage; replace when low
Safety Features	Polarity protection on DC input; clip indicator prevents distortion
Maintenance	Clean with dry cloth; avoid moisture; remove battery if unused
Warranty	Damage from misuse not covered
Disposal	Electronic waste – recycle per local guidelines

Frequently Asked Questions - MM81 Qtx

How do I power the QTX MM81 mixer?

The MM81 can be powered by a 9V PP3 battery (included) inserted into the battery compartment, or by an optional 12Vdc 200mA power adaptor connected to the rear DC input with correct polarity.

What types of inputs does the MM81 accept?

The MM81 has 8 inputs via 6.3mm jacks that accept microphone level signals. For line level sources, use the LM41 or LM82 models.

How many outputs does the MM81 have?

It has a single mono output via a 6.3mm jack. All inputs are mixed to this one output.

What is the output level of the MM81?

The nominal output level is +4dB with a maximum of +8dB. The output impedance is 600 Ohms.

How can I avoid distortion when using the mixer?

Keep the red clip LED off except for brief moments. If it stays on, reduce the Master Volume control to prevent distortion.

Can I use the MM81 with a guitar or keyboard?

The MM81 is designed for microphone level inputs. For line level instruments like keyboards, consider the LM41 or LM82 models.

What are the dimensions and weight of the MM81?

The dimensions are 150 x 108 x 64mm and it weighs 621g without the battery.

How do I install the battery?

Unscrew the cover on the base of the mixer, connect the 9V battery clip, and replace the cover. A battery is supplied.

Is the MM81 a stereo mixer?

No, it is a mono mixer. All inputs are summed to a single mono output. For stereo, use the LM82 model.

What should I do if the mixer stops working?

First check the battery or power adaptor connection. If using a battery, replace it. Ensure all input and output cables are secure. If problems persist, consult the manual or contact support.

USER MANUAL MM81 Qtx

Item ref: MM41 170.202UK

MM81 170.203UK

LM41 170.204UK

LM82 170.205UK

Mini Mixers

User Manual

Version 1.1

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Thank you for choosing the QTX mini mixer series as part of your audio system. These convenient, compact units are designed to provide a useful solution for combining several mic or line signals into a single sound system.

Please read and keep this guide to help get the best results and avoid damage to your mini mixer.

The QTX mini mixers can be powered by a 9V battery or optional 12Vdc power adaptor.

To insert a 9V PP3 battery, unscrew the cover on the base of the mixer, connect the battery clip and replace cover.

Alternatively, connect a 12Vdc 200mA (min) adaptor to the rear DC input, ensuring the correct polarity.

With the power switched off at the rear and all volume controls turned down, connect all inputs via 6.3mm jack.

MM41 and MM81 models have inputs to match microphone level. LM41 and LM82 models require line level inputs.

All inputs will be mixed to a single output except the LM82 mixer, which feeds 4 inputs to each of 2 outs for stereo.

Connect the output jack(s) to the sound system or recording device.

Switch the power on and turn up Master Volume part way. The power LED will illuminate.

Increase each input channel volume in turn, checking the level through the connected equipment.

When all inputs are balanced as required, adjust the Master Volume to the required level.

Ensure that the red LED beside the Master Volume control does not light other than momentarily.

If this LED stays on longer than this, reduce the Master volume.

Specifications

Model	MM41	MM81	LM41	LM82
Input impedance	3.3k Ohms	3.3k Ohms	20k Ohms	20k Ohms
Inputs	4 x 6.3mm jack	8 x 6.3mm jack	4 x 6.3mm jack	8 x 6.3mm jack
Outputs	1 x 6.3mm jack	1 x 6.3mm jack	1 x 6.3mm jack	2 x 6.3mm jack
Weight	533g (no battery)	621g (no battery)	533g (no battery)	621g (no battery)
Battery	9V battery (PP3 supplied)
Power adaptor	12Vdc, 200mA (optional)
Output level	+4dB (+8dB max.)
Output impedance	600 Ohms
Dimensions	150 x 108 x 64mm

Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life. The goods must be disposed of according to your local council guidelines.

Errors and omissions excepted. Copyright© 2021. AVSL Group Ltd.

Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ

AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.