Introduction
This manual provides essential information for the setup, operation, and maintenance of your Behringer XENYX Q1204USB mixer. Please read this manual thoroughly to ensure proper use and to maximize the performance of your device.
The Behringer XENYX Q1204USB is a premium ultra-low noise, high headroom analog mixer featuring XENYX microphone preamps, studio-grade compressors, and a USB audio interface for direct connection to a computer.
Important Safety Instructions
Always follow basic safety precautions when using electrical equipment to reduce the risk of fire, electric shock, and injury to persons. Keep these instructions for future reference.
- Do not use this apparatus near water.
- Clean only with a dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Unplug this apparatus during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
Unpacking and Contents
Carefully unpack your Behringer XENYX Q1204USB mixer and inspect it for any signs of damage. If any damage is found, contact your dealer immediately. Retain the original packing materials for future transport or storage.
Package Contents:
- Behringer XENYX Q1204USB Mixer
- Power Cable
- User Manual (this document)
- Wireless Option (if included with your specific package)

Image: Front view of the Behringer XENYX Q1204USB mixer, showing all controls and inputs/outputs on the top panel.
Setup
1. Power Connection
- Ensure the mixer's power switch is in the OFF position.
- Connect the supplied power cable to the AC IN socket on the rear panel of the mixer.
- Plug the other end of the power cable into a suitable AC power outlet.

Image: Rear panel of the Behringer XENYX Q1204USB mixer, showing the power input, power switch, phantom power switch, main outputs, ALT 3-4 outputs, and control room outputs.
2. Input Connections
The Q1204USB features various input types:
- Microphone Inputs (Channels 1-4): Use XLR cables to connect microphones. These channels feature XENYX Mic Preamps. Activate +48V phantom power via the rear panel switch for condenser microphones.
- Line Inputs (Channels 1-4): Use 1/4" TRS or TS cables for line-level instruments or devices.
- Stereo Line Inputs (Channels 5/6, 7/8): Use 1/4" TRS or TS cables for stereo line-level sources.
- 2-Track Input: RCA inputs for connecting external playback devices (e.g., CD player, media player).
3. Output Connections
- Main Outputs: XLR outputs for connecting to main PA systems or recording interfaces.
- ALT 3-4 Outputs: 1/4" TS outputs for sending a sub-mix to an external recorder or monitor.
- Control Room Out: 1/4" TS outputs for connecting to studio monitors.
- Phones Output: 1/4" TRS stereo output for headphones.
4. USB Audio Interface Connection
Connect the mixer to your computer using a standard USB cable. The Q1204USB functions as a 2-input/2-output USB audio interface, allowing you to record your main mix or playback audio from your computer through the mixer.

Image: Illustration of the USB interface logo and a USB Type-B connector, indicating the mixer's USB connectivity.
Operating Instructions
1. Channel Controls (Mono Channels 1-4)
- GAIN: Adjusts the input sensitivity for the microphone or line input. Set this to achieve a healthy signal level without clipping.
- COMP (Compressor): A "one-knob" compressor for dynamic processing. Turn clockwise to increase compression. The LED indicates compression activity.
- EQ (Equalizer):
- HIGH: Adjusts treble frequencies.
- MID: Adjusts mid-range frequencies.
- LOW: Adjusts bass frequencies.
- AUX: Sends a portion of the channel signal to the AUX send output, typically used for monitor mixes or external effects.
- PAN: Positions the channel signal within the stereo field (left to right).
- MUTE: Silences the channel.
- CLIP LED: Illuminates when the input signal is too high, indicating potential distortion. Reduce the GAIN if this LED lights up frequently.
- Channel Fader: Adjusts the overall volume of the channel in the main mix.

Image: Angled view of the Behringer XENYX Q1204USB mixer, highlighting the individual channel controls and faders.
2. Stereo Channels (5/6, 7/8)
These channels offer similar controls but are designed for stereo line-level sources. They typically have fewer EQ bands and no compressor.
3. Main Mix Section
- AUX SENDS: Controls the overall level sent to the AUX output.
- AUX RETURNS: Controls the level of signals returning from external effects processors connected to the AUX return inputs.
- MAIN MIX FADER: Controls the overall output volume of the main stereo mix.
- LEVEL METERS: LED meters display the output level of the main mix. Aim for levels around 0 dB to avoid clipping.
- PHONES/CTRL ROOM: Adjusts the volume for the headphone and control room outputs.
- USB/2-TR TO MAIN: Routes the USB or 2-Track input signal to the main mix.
4. USB Audio Interface Operation
When connected to a computer, the Q1204USB acts as a standard audio interface. No special drivers are typically required for basic operation on most modern operating systems. You can record the main stereo mix to your computer or play back audio from your computer through the mixer's main outputs.

Image: Screenshot of a Digital Audio Workstation (DAW) software interface, illustrating how the mixer can integrate with computer recording setups.
5. Wireless-Ready Feature
The mixer is designed to integrate with Behringer's digital wireless systems (sold separately). Consult the wireless system's manual for specific connection and operation instructions.
Maintenance
- Cleaning: Disconnect power before cleaning. Use a soft, dry cloth to wipe the surface of the mixer. Avoid using abrasive cleaners or solvents.
- Ventilation: Ensure that the ventilation openings are not blocked to prevent overheating.
- Storage: When not in use for extended periods, store the mixer in a cool, dry place, preferably in its original packaging or a protective case.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable disconnected; power switch off; faulty outlet. | Check power cable connections; ensure power switch is ON; test outlet with another device. |
| No sound output | Main mix fader down; channel fader down; mute engaged; incorrect cable connections; faulty speakers/headphones. | Raise main mix and channel faders; disengage mute; verify all cable connections; test speakers/headphones. |
| Distorted sound | Input gain too high (CLIP LED active); output level too high; faulty cable/microphone. | Reduce input GAIN; lower main mix fader; check cables and input sources. |
| Phantom power not working | Phantom power switch off; faulty microphone. | Ensure +48V switch on rear panel is ON; test with another condenser microphone. |
| USB audio not recognized or no sound | Incorrect USB cable; computer driver issue; incorrect audio settings on computer/DAW. | Use a high-quality USB cable; check computer's sound settings to ensure Q1204USB is selected as input/output device; restart computer. |
Specifications
| Feature | Detail |
|---|---|
| Model | Q1204USB |
| Brand | Behringer |
| Number of Channels | 12 (4 mono, 4 stereo) |
| Microphone Preamps | 4 XENYX Preamps with Phantom Power |
| Compressors | 4 studio-grade "one-knob" compressors |
| Equalization | 3-band EQ on mono channels |
| Audio Interface | USB (2-in/2-out) |
| Hardware Interface | USB |
| Connectivity Technology | USB |
| Item Weight | 6.24 pounds (2.83 kg) |
| Product Dimensions | 12.99 x 10.43 x 3.54 inches (330 x 265 x 90 mm) |
Warranty and Support
For detailed warranty information and technical support, please refer to the official Behringer website or contact their customer service. Keep your purchase receipt as proof of purchase for warranty claims.
Online resources and FAQs may also be available on the Behringer support pages.





