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CMX PA-4120MX – 4 Zone Mixer Amplifier
► 4 × 120W Continuous RMS Power: Four discrete Class-AB power amplifier modules deliver 480W total commercial audio output across 4 independent zones.
► Simultaneous 100V & 8–16Ω Speaker Outputs: Multi-tap transformer outputs per zone allow seamless integration of high-voltage distributed runs or low-impedance loudspeakers.
► Flexible 4-Zone Matrix Routing: Matrix switches 3 microphone/line inputs, 1 auxiliary source, and the internal digital media player to any zone independently.
► Integrated Multi-Format Media Player: Onboard MP3 playback via USB flash drive and SD card, high-sensitivity digital FM tuner, and wireless Bluetooth receiver.
► 3 Balanced Combo XLR Inputs with +48V Phantom: Studio-grade microphone preamps accommodate condenser gooseneck mics, with Mic 1 VOX voice-activated muting priority.
► Remote Microphone & Wall Panel Integration: Dedicated RJ45 ports support up to 8 × PA-4500RM paging microphones and 4 × PA-4500WP remote control wall panels via CAT6.
► Fire Alarm EMC & Remote Mute Override: Dedicated emergency contacts automatically mute background audio and broadcast high-priority life safety announcements.
► Standard 19″ 3U Rack-Mount Chassis: Heavy-duty industrial steel construction with integrated aluminum rack ears engineered for 24/7 commercial installations.
CMX PA-4120MX 4 Zone Commercial Mixer Amplifier
480W (4 × 120W RMS) 4-Zone Matrix Commercial Mixer Amplifier with USB/SD/FM/Bluetooth, 100V & 8–16Ω Outputs, 3 Combo XLR Mics with +48V Phantom, EMC Fire Priority, and CAT6 Remote Expansion
The CMX PA-4120MX is an enterprise-grade 4-zone commercial mixer amplifier engineered for multi-room, multi-source background music, zone paging, and voice alarm installations. Delivering 480W continuous RMS power via four discrete 120W amplification channels, the PA-4120MX features full matrix audio routing allowing 3 balanced mic/line inputs, 1 auxiliary source, and the onboard USB/SD/FM/Bluetooth digital player to be assigned independently to any of the 4 zones. With simultaneous 100V constant-voltage and 8–16Ω low-impedance terminals per zone, support for up to 8 remote paging microphones and 4 remote wall control panels over CAT6 cable, and seamless fire alarm emergency mute integration, the PA-4120MX establishes an authoritative standard for commercial multi-zone audio infrastructure.
Ideal For
✓ Multi-Room Restaurants, Bars & Nightclubs
✓ Fitness Centers, Gymnasiums & Spas
✓ Corporate Office Buildings & Campuses
✓ Shopping Malls & Multi-Story Retail Complexes
✓ Educational Institutes & University Campuses
✓ Theme Parks, Zoos & Public Entertainment Venues
✓ Healthcare Facilities & Hospital Complexes
Core Engineering Features
4 × 120W Discrete Commercial Power Amplifiers
Equipped with four independent Class-AB power amplifier modules providing 120W RMS continuous clean output per zone (480W total), ensuring true multi-zone acoustic isolation without crosstalk.
Comprehensive 4-Zone Matrix Audio Routing
Enables independent routing of any connected audio source (Mic 1–3, Line In, USB, SD, FM, Bluetooth) to any combination of the 4 zones simultaneously, delivering total multi-room acoustic customization.
Simultaneous 100V & 8–16Ω Output Adaptability
Each zone features dedicated multi-tap transformer terminals supporting 100V constant-voltage lines for long-distance distributed speakers, as well as low-impedance 8–16Ω outputs for high-fidelity foreground speakers.
Studio-Grade XLR Mics with +48V Phantom & VOX
3 balanced combo XLR/jack inputs with independent +48V phantom power switches support premium condenser gooseneck paging microphones, backed by Mic 1 VOX voice-activated background music ducking.
CAT6 Remote Paging & Wall Control Network
Dual RJ45 expansion ports link up to 8 × PA-4500RM 4-zone remote paging microphones and up to 4 × PA-4500WP remote wall control panels up to 1,000 meters away over cost-effective twisted-pair CAT6 cable.
Fire Alarm EMC Override & Multi-Tier Protection
Features a dedicated EMC line input and dry contact remote mute terminal for fire alarm evacuation broadcast, fortified by short-circuit, overload, clip limiting, and thermal protection circuitry.
100V Line Tap Allocation & Zone Power Guide (480W Capacity)
To guarantee thermal longevity, prevent clipping, and compensate for line resistance across extensive commercial cable runs, industry engineering standards dictate an 80% continuous operating rule. With 120W RMS rated output per channel, the CMX PA-4120MX provides 96W of continuous acoustic power per zone (384W total usable system power) with a 24W dynamic headroom margin per zone.
| Amplifier Zone | Speaker Category & Model | 100V Line Tap | Max Recommended Speakers | Total Continuous Load |
|---|---|---|---|---|
| Zone 1 (Reception & Lobby) | Coaxial Ceiling (CMX CSK-66H) | 6W Tap | Up to 16 Speakers | 96 Watts (Safe 80% Load) |
| Zone 2 (Meeting & Office Suites) | Frameless Ceiling (CMX CSK-56PC) | 6W Tap | Up to 16 Speakers | 96 Watts (Safe 80% Load) |
| Zone 3 (Restaurant / Dining Area) | Wall Mount (CMX WSK-530T) | 15W Tap | Up to 6 Speakers | 90 Watts (Safe 75% Load) |
| Zone 4 (Outdoor Garden & Terraces) | Garden Speaker (CMX GSK-30C) | 15W Tap | Up to 6 Speakers | 90 Watts (Safe 75% Load) |
Speaker Matching & System Compatibility
As an authorized commercial AV distributor in India, ProjecXive engineers integrated multi-room acoustic ecosystems. The CMX PA-4120MX pairs seamlessly with:
Commercial Ceiling Speakers
Ideal for flush false ceilings in corridors, office cabins, hotel guest rooms, and dining areas.
Surface Wall & Column Speakers
Designed for gymnasiums, hotel ballrooms, retail showrooms, and worship facilities.
Remote Paging & Wall Control Panels
Enables decentralized zone paging and local in-room source/volume control via standard CAT6 cabling.
Technical Specifications
| Parameter | Details |
|---|---|
| Model | CMX PA-4120MX |
| Description | 4 Zone Commercial Mixer Amplifier with USB/SD/FM/Bluetooth & Audio Matrix |
| Rated Power Output | 4 × 120W RMS (480W Total Continuous Output) |
| Speaker Outputs | 4 Independent Zones supporting simultaneous 100V Constant-Voltage & 8–16Ω Low-Impedance |
| Matrix Architecture | 4-Channel Audio Matrix Routing (any input assignable to any of the 4 zones independently) |
| Microphone / Line Inputs | Mic 1–3: Balanced COMBO XLR / 6.35mm jack with switchable +48V Phantom Power (10mV, 600Ω) |
| Auxiliary Line Inputs | 1 × Line In: Dual RCA (150–470mV, 10kΩ unbalanced) |
| Emergency Audio & Mute | 1 × EMC High-Priority Input; Remote Mute contact (Closed circuit = mute, open circuit = normal) |
| Built-in Media Engine | USB thumb drive port, SD memory card slot, digital FM radio tuner, and Bluetooth receiver |
| Remote Network Expansion | 2 × RJ45 ports supporting up to 8 × PA-4500RM paging mics and 4 × PA-4500WP wall panels via CAT6 |
| Pre-Amp Line Outputs | 4 × Zone RCA Line Outs (0.775V / 0dBV) for external slave amplifiers or multi-track recording |
| Frequency Response | 80Hz – 16,000Hz (±3dB) |
| Total Harmonic Distortion (THD) | < 0.1% at 1kHz, 1/3 rated output |
| Signal-to-Noise Ratio (S/N) | Line In > 80dB; Mic In > 70dB |
| Tone & Equalization | Independent Bass (±10dB at 100Hz) & Treble (±10dB at 10kHz) controls for each input channel |
| Zone Output Controls | 4 × Zone Master Volume Attenuators with 5-segment LED output level indicators and Chime volume |
| Priority Hierarchy | Remote Mute > EMC Audio > Mic 1 (VOX Ducking) > PA-4500RM Remote Mics > BGM Sources |
| Protection Circuitry | Short-circuit, clip limiter, DC overload, and high-temperature thermal cutoff protection |
| Cooling System | Forced-air ventilation with internal dual cooling fans and extruded aluminum heatsinks |
| Power Supply & Consumption | AC 230V, 50/60Hz; 650W Maximum Consumption |
| Chassis & Form Factor | Standard 19″ 3U Rack-Mount heavy-duty steel enclosure with aluminum front panel |
| Dimensions (W × D × H) | 484 × 448 × 132 mm (19-inch 3U rack standard) |
| Net Weight | 14.5 kg |
Frequently Asked Questions
How does the 4-channel matrix routing system work on the CMX PA-4120MX?
The PA-4120MX incorporates a built-in 4-channel audio matrix engine. This allows any connected audio source—including Mic 1–3, the auxiliary RCA line input, or the onboard USB/SD/FM/Bluetooth media player—to be matrix assigned to any of the 4 zones independently. For example, you can stream Bluetooth background music to the hotel dining room (Zone 1), play FM radio in the gym (Zone 2), and broadcast a microphone presentation in the meeting hall (Zone 3) simultaneously.
What is the maximum number of speakers I can connect per zone on the PA-4120MX?
The PA-4120MX provides 120W RMS power output per channel. Applying the commercial audio 80% continuous safety rule gives 96W of continuous usable acoustic power per zone. Each zone can comfortably power up to 16 × 6W ceiling speakers (e.g. CMX CSK-66H or CSK-56PC), 32 × 3W speakers, or 6 × 15W wall mount speakers (e.g. CMX WSK-530T), providing a total capacity of up to 64 ceiling speakers across all 4 zones.
How do the PA-4500RM remote paging microphones and PA-4500WP wall panels connect?
The amplifier rear panel features two dedicated RJ45 network expansion ports. Up to 8 units of CMX PA-4500RM 4-zone remote paging microphones and up to 4 units of CMX PA-4500WP remote wall control panels can be daisy-chained or connected via standard CAT6 twisted-pair cabling over transmission distances up to 1,000 meters, allowing localized in-room source/volume control and zone-selective paging from multiple reception desks.
Can I run 100V commercial speakers and 8-Ohm low-impedance speakers simultaneously?
Each of the 4 independent zone amplifier channels features separate terminal taps for 100V constant-voltage lines and 8–16Ω low-impedance loudspeakers. While both output types are supported by the amplifier, good commercial sound engineering practice requires that any individual zone channel runs either 100V transformer-tapped speakers OR 8Ω low-impedance speakers—not mixed in parallel on the same zone terminal.
How does the fire alarm emergency override and mute function operate?
The PA-4120MX features a dedicated dry contact Remote Mute terminal and a high-priority EMC line audio input. When interfaced with a central building fire alarm control panel, contact closure instantly mutes all non-emergency background music channels and broadcasts emergency evacuation announcements or voice alarms across all 4 zones with highest priority.
Engineer Your Perfect Commercial Audio & Visual Environment
Contact our AV specialists for professional product selection, system integration, and turnkey installation support.
| Model | CMX PA-4120MX |
|---|---|
| Brand | CMX |
| Product Type | 4 Zone Commercial Mixer Amplifier with Matrix & Media Player |
| Rated Power Output | 4 × 120W RMS (480W Total Continuous Output) |
| Speaker Outputs | 4 Independent Zones (100V Constant-Voltage & 8–16Ω Low-Impedance per Zone) |
| Matrix Architecture | 4-Channel Audio Matrix Routing (Any input assignable to any zone) |
| Built-In Audio Sources | USB Port, SD Card Slot, Digital FM Tuner, Wireless Bluetooth Receiver |
| Microphone Inputs | 3 × Balanced COMBO XLR / 6.35mm Jack with Switchable +48V Phantom Power |
| Auxiliary Inputs | 1 × Stereo RCA Line Input (150–470mV / 10kΩ) |
| Emergency Inputs | 1 × EMC High-Priority Emergency Input & Remote Mute Contact Terminal |
| Remote Network Ports | 2 × RJ45 Ports (Up to 8 × PA-4500RM Remote Mics & 4 × PA-4500WP Wall Panels via CAT6) |
| Pre-Amp Line Outputs | 4 × Zone RCA Line Outputs (0.775V / 0dBV) |
| Frequency Response | 80Hz – 16,000Hz (±3dB) |
| Total Harmonic Distortion (THD) | < 0.1% at 1kHz, 1/3 rated output |
| Signal-to-Noise Ratio (S/N) | Line In > 80 dB, Mic In > 70 dB |
| Tone Controls | Independent Bass (±10dB @ 100Hz) & Treble (±10dB @ 10kHz) per input |
| Zone Output Controls | 4 × Zone Master Volume Attenuators with 5-segment LED level indicators |
| Priority Hierarchy | Remote Mute > EMC Audio > Mic 1 VOX > PA-4500RM Remote Mics > BGM Sources |
| Protection Circuitry | Short-Circuit, Overload, Clip Limiter, Thermal Cutoff |
| Cooling System | Forced-air ventilation with internal dual cooling fans |
| Power Supply | AC 230V, 50/60 Hz |
| Power Consumption | 650W Maximum |
| Chassis & Form Factor | Standard 19" 3U Rack Mount Heavy-Duty Steel Chassis |
| Dimensions (W × D × H) | 484 × 448 × 132 mm (19" 3U Rack Standard) |
| Net Weight | 14.5 kg |
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ProjecXive Technical Integration Team (verified owner) –
Superior 4-zone matrix amplifier with robust 4x120W power delivery. The CAT6 remote microphone and wall panel integration provides unparalleled flexibility for multi-room hotel, corporate, and campus sound installations.