The (often listed as Audio Choice by SoundTech QM4
Before operating the QM4, it's crucial to follow these basic safety guidelines to ensure the longevity of the device and the safety of all users:
Built-in global analog spring reverb with an external Effects Loop (Send/Return).
Ensure the PA head is running on the same electrical circuit as your instruments. Swap out low-quality instrument cables for high-quality shielded XLR cables. Input stage clipping or mismatched speaker impedance. audio choice qm4 manual
The term "QM4" is used across a range of audio products, so it's helpful to be aware of other models you might encounter:
or original 2-way 10" enclosures, to create a complete sound system. System Features Power Output : Delivers 100 Watts RMS at 4 Ohms. : Four individual input channels, each featuring both Channel Controls : Individual adjustments for Master Section
If you need help configuring specific gear with this head, let me know you are plugging in, the impedance/model of your speakers , and your specific room setup . I can give you an exact layout strategy. Share public link The (often listed as Audio Choice by SoundTech
Before making connections, verify that your equipment matches the structural electrical limitations of the QM4 head. Specification 100 Watts RMS Typically rated at 4 Ohms or 8 Ohms minimum load Input Channels 4 Monophonic Channels Dual-interface configuration per channel Connector Types XLR (Low-Z) & 1/4-inch TS (High-Z) Supports microphones and line-level instruments Master Equalization Built-in Graphic EQ Tailors the final output room acoustics Chassis Build Heavy-duty Tolex with corner guards Designed for transport and gig endurance Control Panel Layout and Signal Flow Operating the Audio Choice QM4
[Microphones / Instruments] ──> [QM4 Front Inputs (Ch 1-4)] │ ▼ (Internal 100W Amp) [Passive Speakers (8Ω min)] <── [QM4 Rear Speaker Outputs]
: Controls the final output volume sent directly to your passive speaker enclosures. Back Panel Connections and Signal Routing Input stage clipping or mismatched speaker impedance
Optimally paired from the factory with two Audio Choice C100 2-way passive speaker enclosures containing 10-inch low-frequency drivers and performance-rated horn tweeters. 🎛️ Complete Channel and Panel Breakdown
: A balanced low-impedance input designed primarily for dynamic microphones.
Navigate to the desired channel strip (e.g., Vocal Mic on Channel 1).
Adjusts global acoustics. Use this to adapt the entire PA system to the specific acoustics of different rooms.