Audio Choice Qm4 Manual _verified_ «Direct»

: An unbalanced high-impedance input optimized for line-level gear, such as keyboards, acoustic guitars, and external media players.

Controls the overall volume of the 100-watt built-in amplifier.

Turn down the channel knob and raise the Main Level instead. Confirm that your speaker load matches the factory rating. Technical Specifications Summary Manufacturer : SoundTech / Audio Choice Model : QM4 Powered Mixer Power Output : 100 Watts RMS Channels : 4 Independent Mono Channels Inputs : 4 x XLR (Low-Z), 4 x 1/4-inch TS (High-Z) Master Tone Shaping : 3-Band Graphic/Rotary Equalizer Effects : Internal Spring Reverb (Footswitchable)

: Ensure your total speaker load matches the amplifier specifications (typically a minimum of 4 Ohms or 8 Ohms total). Connecting a load with too little resistance will overheat the internal power transformer. audio choice qm4 manual

: You must connect passive (unpowered) PA speakers (such as the compatible AudioChoice C100 units). Never connect active/powered speakers to the speaker outputs, as doing so will instantly destroy their built-in amplifiers.

: Plug microphones into the XLR ports and instruments (like keyboards or guitars) into the 1/4" ports. Connect your passive speakers to the outputs on the rear using 1/4" speaker cables.

Since "Audio Choice" is not a widely recognized major brand for professional audio equipment, it is highly likely you are referring to a , QTX QM4 , or a generic 4-Channel Stereo Amplifier often sold under various brand names (like Adastra or Velleman). Confirm that your speaker load matches the factory rating

Its typical applications include:

Keep the low (around 2 or 3 ) while setting initial levels.

This article serves as a comprehensive guide, functioning as an extended , covering setup, features, operational tips, and troubleshooting. 1. Introduction to the Audio Choice QM4 : You must connect passive (unpowered) PA speakers

: Platforms like Manualzz.com and Mofile.net are sometimes the last libraries of these rare documents. For instance, a search result for "QM4和QS4使用说明书" exists, which translates to "QM4 and QS4 User Manual." While often behind a paywall or for a different configuration, it proves that PDFs did circulate in niche online spaces at some point.

High-impedance port configured for acoustic-electric guitars, keyboards, bass preamps, or line-level playback gear (such as laptops or phones using an adapter).