Freeboss UM-33 3 Channels Input Mic Line USB Interface Audio Mixer

US $67.00
US $82.00
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Estimated Delivery Date: Wednesday, October 6

Due to high demand, please allow at least 2-4 weeks for delivery.

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Product Details
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Product Details

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


Product Manual
Controls and Function
1. MIC input jacks
For connecting to a microphone, an instrument, or an audio device. These jacks support XLR plugs.
2. Guitar/Line input jack
For connecting to an instrument, such as an electric guitar or an electric bass.
This jack support phone plugs.
This jack is disabled when the GUITAR/LINE switch is off.
3. Guitar/Line switch
For switching the input on channel 2.
Turn this switch on when directly connecting an instrument with high output impedance, such as an electric guitar or electric bass, to the guitar input jack.
Turn this switch off when connecting a line-level instrument to the Line input jack. When this switch is turned on, use an unbalanced cable with phone plugs to connect the instrument to the mixe.
When operating this switch, turn all output controls(such as the speaker knob and headphones knob) fully to “0”(minimum). Sudden high level peaks caused by the switching operation can damage external devices as well as the hearing of those present.
Turning the switch on, assign the sound from the computer via the USB 2.0 terminal to channel 2/3.
5. +48V phantom switch / +48V LED
When this switch is turned on, the +48V LED lights and DC +48V phantom power is supplied to the XLR plug on MIC input jack.
Turn this switch on when using a phantom powered condenser microphone.
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 phantom power to channel 1.
Make sure to turn this switch off when connecting/disconnecting a cable to/from channel 1.
Slide the fader on channel 1 to minimum before turning this switch on/off.
Lights when the volume of input sound is too high.
If it is lit, turn turn the Gain knob to the left to lower the volume.
Gain KnobDetermines the basic volume for channel 1.
Adjust this knob so that the CLIP LED flashes briefly when singing or playing the loudest.
7. CH2-CH3 Level knobs
Adjust the volume of the sound input from the CH2/3 LINE INPUT, and the sound input from the computer via the USB2.0 terminal
8. Line input jacks
For connecting to line-level devices such as electric keyboard or an audio device.
Use the L/MONO jack on channel for instruments, etc. with mono output.
In this case, the sound input to the L/MONO jack is output from both the L channel and R channel on the mixer.
9. Main out jacks
Connect powered monitor speakers.
These jacks support phone plugs(balance/unbalanced)
10. Headphones output jack
For connecting to a set of headphones.
This jack supports a stereo phone plug.
11. Power On LED
The light is on, that the mixer has been working.
12. Headphones level knob
Adjust the volume to headphones connected to the Headphones output jack(and “HEADSET” headphones output jack A).
13. Level meter
If the level of the sound sent to the computer exceeds -3dBu, SIG(green) turns on; if the level reaches 3 dB before clip level (+6dBu), CLIP(red) turns on.
To send an appropriate volume to the computer, adjust the volume of each channel until SIG remains lit and CLIP flashes only momentarily when there is a loud sound.
14. Main Out Level knob
MAIN OUT knob adjust the volume send to MAIN output jack.
15. USB 2.0 terminal
For connecting to a computer using the included USB2.0 cable.
When connected to a computer, the computer supplies power to the mixer and audio data can be sent between the mixer and computer.
Please do not connect any device to USB2.0 terminal other than personal computers or tablet devices.
Please read the safety precautions for the USB power adapter or USB mobile battery that you are using.
Use a USB power adapter or USB mobile battery that can supply power via a USB micro B plug based on the following USB standards:
Output voltage:4.8V to 5.2V
Output current: 0.5A or greater.


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Shipping & Payment

Shipping and delivery

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

Refunds & returns policy

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

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  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of sajirecords (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://sajirecords.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.


How much do you charge for shipping?

We provide free shipping to over 200 countries around the world*
*with some exceptions

Will I be charged any shipping, customs or duties fees?

No, the price you see is the price you pay - you won't be charged any extra fees.

When will you ship my order?

If you order an in-stock item, we’ll ship it within 3 working days.

How long will my order take to arrive?

Orders are shipped by EMS or USPS. Typically, delivery takes 5-20 working days after dispatch, but it may take longer due to factors beyond our control.

Do you provide tracking information?

You will receive your tracking information within 3-5 working days. But sometimes tracking might not be available if free shipping applies. In this case, please contact us at support@sajirecords.com

Can I cancel my order?

You can change or cancel your order within 12 hours. Please contact us at support@sajirecords.com

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