Freeboss UM-66 4 Channels 16 Digital Effects 24 Bit Dsp Processor Sound Card Hall

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Brand Name
Model Number
48V DC

30 Jan 2018

- A*******r A.








REMARKS for UKRAINE Customers:


1. Дорогие клиенты из Украины! Данные продукт находится на наших склада х в Украине и будет доставлен к вам в течении 3-5 дней после оформления заказа. Рады сотрудничеству с вами!


2. Дорогие клиенты! К сожалени ю мы не отправляем посылки в Донецкую и Луганскую  область.

UM-66  14  Audio Mixer



4 Channels Input Mic/Line/Insert Stereo USB Play-back USB Interface Mixer

UM-66  11  Audio Mixer

24 Bit DSP Multi-FX Processor

  1. HALL

  2. ROOM

  3. PLATE

  4. GATED




  8. DELAY

  9. ECHO

  10. CHORUS


  12. PHASER

  13. DETUNE




Key Point:

1. The small mixer with USB2.0 audio interface and 24 Bit DSP Multi-FX processor. It is superior in performance, robust, reliable, and provides a cost-effective choice for podcasts, singers, composers, and audio professionals in small tuning situations.

2. USB cord connect the audio mixer to computer: Record your sound or your singing sound, or the sound you want to record. and you can share and transmit them real-time through the internet.

3. 24Bit sound card: needless driving program. It is comparable with the Windows XP+ and OS X systems, and also comparable with the audio editing and making softwares supporting the CORE AUDIO or  WDM standard, the music player and the professional audio analyzing and testing softwares, and the ones of interactive social programs, network karaoke and chatting on the internet. It can record and replay at the same time to do a dual work.

4. Built-in 24 Bit Multi digital effect processor: Up to 16 kinds of effects. And the SUB parameters of 16 kinds of effects can be adusted carefully, to meet the requirements of your vocal or musical instruments.

5. Specially designed A-type microphone pre-amplifier: Low noise, distortion and a very high dynamic range. Built-in +48V Phantom power for condenser microphone. Input resistance shifting switch to match high-impedance input equipment (such as electric guitar). 


Input Channels: 

Mono   ( Mic/Line): 2

Stereo         (Line): 1

USB Playback:1

Output Channels: 

Main L/R OUT: 1



Stereo: 1

Input Channel Function:


1. Gain:-14-40dB

2. 2 Band EQ, 80Hz/12KHz,+/-15dB

3. +48V Phantom power, LED

4. Impedance switch

5. Peak LED

USB audio

1. Stereo input/Stereo output

2. USB audio classic 2.0 compliant

3. Sampling Frequency: Max 96KHz, Bit Depth:24-bit

4. Type B connector


DSP effect

1. 24-bit Sigma-Delta, 256-times oversampling

2. 48KHz sampling rate


Level Meter: 2*6 point LED meter

Max output level: 3Vrms

Frequency response: +/-0.5dB, 20-20KHz

Dynamic range: 102dB

[email protected] : <=0.03%

Stereo crosstalk: 92dB

Power requirements: DC5V, 500mA

Power Consumption: Max. 2.5W

Product Manual
UM-66  15  Audio Mixer
UM-66  16  Audio Mixer

Front Panel Function:

1. Mic/Line/Guitar input jacks of Mic channel

The jacks are used to connect microphones or other audio devices in support of cannon plugs and 6.35 plugs

2. +48V Phantom switch /LED

When this switch is turned on, the +48V LED lights and DC +48V phantom power issupplied to the XLR plug on MIC input jack.


Be sure to leave this switch off if you do not need phantom power. 

Follow the important precautions below, in order to prevent noise and possible damage to external devices as well as the mixer if you turn this switch on. Be sure to leave this switch off when you connect a device that does not support phontom power to channel. Make sure to turn this switch off when connecting / disconnecting a cable to / from channel. Slice the knob on channel to minimum before turning this switch on/off.

3. Guitar / Line input shifter

The switch is used to shift the connections to different sound sources of the input channels. Switched up, the input channel can be connected directly with a high-impedance audio device such an electric guitar or a bass. Switched down, it can be connected to a low-impedance sound device.


In operation of the switch, all level output control (such as channel volume knobs, monitor output knobs and earhpone knobs) should be set up to the minimum position. Because this operation will cause a sudden impact sound, whic can damage the external devices, and hearing of the personal on site.

4. Mic input CH 2 Band EQ

This is a high quality, sensitive, 2 segment equalizer that adjusts the overall tone of the channel. The adjustment waveform of the high and low bass equalizer is the shape of the broom, which affects the frequency of 12KHz and the sound below 80Hz.

5. DSP FX Send Knob

Adjuist the size of the signal sent to the digital effect processor. The signal transmitting point is located after the volume knob of the channel.

6. Pan Knob

Positions the channel signal between L/R  in the stereo mix.

7. MIC Input volume knob/Peak LED

Adjust the volume of the sound input from the microphone or other sourece connected to channel.When the peak light flashes, indicating that the input signal is too high, please turn the volume knob to the left to reduce the volume. In normal use, please avoid the peak light for a long time.

8. DSP Output volume knob

Adjust the digital effect processor output to the listener output, headphone, USB recording volume;

9. USB audio loopback button:

When this button is pressed, the audio signal from the computer through the USB interface can be input into the computer through the USB interface, and then sent to the monitor output and headphone output. if the key is played, the audio signal reproduced from the computer via the USB interface is only transmitted to the monitor output and headphone output.

10. USB audio signal total volume knob:

Adjust  the audio signal level from the computer via the USB interface;

11-13. Digital effect processor control components, see the instructions on the use of the filters

14. Monitor output volume knob

15. Phones output volume knob

16. Monitor output level meter

17. The stereo input channel volume knob

18. The stereo input channel balance knob

19. Power indicator light

20. 6.35mm specification for stereo headphone output interrupts

21.Monitor output jacks:

XLR balanced output interrupt for the connection of active speakers, power amplifiers or other audio devices.

22. 6.35mm - spec stereo line input jack

23. The stereo line input signal sensitivity selection button. bounce to +4dB, press10dB;

24. USB 2.0 terminal 

For connecting to a computer using the included USB 2.0 cable. When connected to a computer, the computer supplies power to the mixer and audio data can be send between the mixer and computer.



Please do not connect any device to USB 2.0 terminal other than personal computers or tablet devices.


Please read teh safety precautions for the USB pwoer adapter or USB mobile battery power via a USB micropho B plug based on the following USB standards:

Output voltage:4.8V to 5.2V

Output current:.5A or greater


UM-66  13  Audio Mixer


UM-66  17  Audio Mixer



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