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Audio Choice Qm4 Manual May 2026

To help you set up or share information about your Q Acoustics Media 4 (M4)

soundbar, here are a few options for a "post" depending on whether you need a quick-start guide, a social media feature, or a technical snippet. 🔊 Quick Setup Guide Post Title: Getting Started with your Q Acoustics M4 Soundbar

Placement: Place the unit on a shelf or wall-mount it using the provided bracket. Note: Ensure at least

of spacing around ventilation openings and avoid mounting it upside down [0.5.1]. Connections:

Digital: Use the Optical (TOSLINK) input for the best sound from your TV. Analog: Use the RCA or 3.5mm Jack for older devices. Bluetooth Pairing: Turn on the and select the Bluetooth input (Blue LED). Search for "

" on your device or use NFC by tapping your compatible phone against the "N" logo on top of the bar. Audio Tips: The

features a built-in subwoofer. For the best bass response, ensure it isn't completely enclosed in a cabinet. 📱 Social Media / "For Sale" Post Headline: Upgrade Your Home Cinema – Q Acoustics M4 Soundbar 🎶

Award-Winning Sound: High-performance BMR (Balanced Mode Radiator) drivers for wide sound dispersion.

Built-in Subwoofer: Big bass without the extra bulky box on the floor. audio choice qm4 manual

Easy Connectivity: Bluetooth aptX for CD-quality streaming, Optical input for TV, and NFC one-touch pairing. Condition: [Insert Condition, e.g., Like New/Excellent]

Included: Original remote, power cable, and wall-mounting bracket. Feel free to DM for the full digital manual if you need it! 🛠️ Technical Resources

If you are looking for the official documentation, you can access it via the Q Acoustics Support Portal [0.5.2].

Instruction Manual: Detailed guide for wall mounting and EQ settings.

Quick Start Guide: One-page visual setup for cables and Bluetooth.

The Audio Choice QM4 is a professional 4-channel passive microphone mixer designed to combine up to four microphone signals into a single output. It is a utility tool commonly used in simple PA setups, small recording projects, or situations where a powered mixer is unavailable. Device Overview

The QM4 is a passive device, meaning it does not require a battery or external power source to operate. It uses internal transformers and resistors to manage the signals. Because it is passive, it does not provide gain; instead, it provides attenuation (reduction) of the input signals to balance them. Key Features Four independent XLR female inputs. One XLR male output. Individual volume control knobs for each channel. Passive circuitry (no power required). Rugged metal chassis for durability. Setup and Connection Connect your microphones to any of the four XLR inputs.

Connect the XLR output of the QM4 to your amplifier, powered speaker, or recording interface. To help you set up or share information

Start with all volume knobs turned fully counter-clockwise (off).

Slowly turn up the knob for the primary microphone until you reach the desired level.

Adjust the remaining knobs to blend the other microphones into the mix. Operating Requirements and Limitations

Dynamic Microphones Only: Since the device is passive, it cannot pass Phantom Power (48V). Do not use condenser microphones with the QM4 unless they are self-powered by their own batteries.

Signal Loss: Being a passive mixer, there is a natural "insertion loss" of signal strength (typically around 6dB to 10dB). You may need to turn up the gain on your amplifier or powered speaker to compensate.

Impedance: It is designed for low-impedance (Lo-Z) microphones. Using high-impedance equipment may result in significant signal degradation or noise. Troubleshooting

No Sound: Ensure all cables are fully seated and that your output device (speaker/amp) is turned on and turned up.

Weak Signal: This is normal for passive mixers. Increase the volume on your destination device. Power Switch: Turns the unit on/off

Distortion: Ensure you are not sending a line-level signal (like from a CD player or keyboard) into the mic inputs, as this will overdrive the internal transformers.

Hum or Buzz: Use shielded XLR cables and ensure the mixer is not sitting directly on top of a large power transformer or amplifier.

⭐ Pro Tip: For the best signal-to-noise ratio, keep your microphone cables as short as possible and use the highest gain setting available on your speaker or amplifier rather than cranking the QM4 knobs to their absolute maximum.

The Audio Choice by Sound Tech QM4 is a 100-watt, 4-channel powered mixer head designed for small PA systems, featuring XLR/1/4" inputs, individual channel EQ, and onboard reverb. Operated by connecting passive speakers to the rear output and balancing channel levels with the master volume, this legacy unit is frequently found on reselling platforms. For a detailed listing with specs, visit Reverb.

The Audio Choice QM4 by SoundTech is a 100-watt, 4-channel powered mixer designed for portable PA applications like small venues and karaoke, featuring independent channel controls and 3-band master EQ. Often paired with C100 speakers, the unit offers versatile inputs including 1/4" and XLR jacks, with options for EFX loops and reverb. Technical details and unit availability can be found at Musician's Friend Audio Choice C100 100W Portable PA System

Method 2: QR Code on the Product Box

Most Audio Choice QM4 packaging includes a QR code on the bottom or side flap. Scanning this code with your smartphone will redirect you directly to the latest manual version.

1. Overview & Front Panel

The QM4 is typically a 19-inch rack-mountable amplifier designed to run four separate zones (or channels) of audio.

  • Power Switch: Turns the unit on/off.
  • LED Indicators: Usually includes a "Power" LED and "Signal/Clip" LEDs for each channel.
    • Green: Signal present.
    • Red: Clipping (distortion)—turn down the volume if this stays red.
  • Volume Knobs: Controls the output level for each channel (CH1, CH2, CH3, CH4) individually.

3. Technical Specifications

(Note: Specifications may vary slightly depending on the specific revision or manufacturer batch. Values below are standard for the QM4 series).

  • Power Output:
    • Typically rated at 120 Watts (some variations may be 100W or 60W depending on the specific sub-model, e.g., QM4-120).
    • Low impedance output: 4Ω or 8Ω.
    • High impedance output: 70V / 100V (Constant Voltage systems).
  • Frequency Response: 50Hz – 18kHz (±3dB).
  • Total Harmonic Distortion (THD): < 1% at rated power.
  • Signal-to-Noise Ratio (S/N): > 70dB.
  • Inputs:
    • Channels 1–4: Combination connectors (XLR / ¼” Phone jack) or Euroblock terminal connectors.
    • Input Types: Switchable between Microphone (Mic) and Line level signals.
    • Phantom Power: Often +24V DC available for condenser microphones (globally switched or per channel).
  • Controls: Independent Volume, Treble, and Bass controls for each channel.
  • Power Supply: Standard AC Mains (110V/220V switchable depending on region).