Public Address System
A complete modular Public Address platform built around the ABT-MX audio matrix family — a single 1U processor at the centre of every system, surrounded by zone microphones, Class-D power amplifiers, wall-mounted controllers and Dante-network interfaces. Each component is engineered to interoperate seamlessly via the matrix’s RD ports and shared DSP toolchain.
Common to the range: 24-bit DSP, 100–240 VAC operation, 19″ rack form factor for matrices and amplifiers, and a single PC application for configuration, presets and live operation. Optional Dante support extends the system into networked audio infrastructure.
SYS
System Architecture
The brain of the system — ABT-MX6 (6×6) or ABT-MX12 (12×8). Handles signal routing, DSP processing, level control, and integration of microphones, controllers and amplifiers via four RD ports.
ABT-DM3 (touchscreen, 64 zone groups) and ABT-DM6 (6-button, 96 zone groups). Live PTT broadcasting plus playback of stored audio messages, with chained linking up to 100 m on CAT-5e.
ABT-PA2480AC (2×480 W) and ABT-PA4480AC (4×480 W). Class-D efficiency, 8 Ω or 100 V outputs, automatic standby, and per-channel logic outputs for fault diagnostics.
ABT-WVC wall-mounted touchscreen for zone routing and volume control, plus ABT-DIO Dante interface for network audio integration with full DSP, AEC and FBC processing.
Audio Matrices
The central element of every Public Address installation. Both matrices share identical DSP performance, 4 RD ports for connecting microphones and controllers, optional Dante support, and intuitive PC-based configuration — differing only in input/output channel count.
ABT-MX6
Audio Matrix · 6 × 6A 6-input by 6-output audio matrix designed for small to mid-scale Public Address systems. Extensive DSP options enable level adjustment, equalisation, dynamics processing and signal routing — all configurable via intuitive PC software. Suitable for users of all skill levels: simple maintenance-free operation out of the box, or full manual control of routing and DSP for complex deployments.
Four RD (remote device) ports connect ABT-DM3/DM6 zone microphones and ABT-WVC controllers. Optional Dante support extends the matrix into networked audio infrastructure for facility-wide distribution. Ability to upload presets simplifies multi-mode operation (day/night, normal/announcement).
| Channels | 6 analog inputs / 6 analog outputs |
| RD Ports (Remote Device) | 4 — for microphones & controllers |
| Dante Support | Optional |
| DSP Functions | Level, EQ, dynamics, signal routing, presets |
| Input Impedance | 6.8 kΩ |
| Phantom Power | +48 VDC (±3 V) |
| Frequency Response | 20 Hz – 20 kHz @ 0 dBu ±1.5 dB |
| THD+N | < 0.03% @ 20 Hz – 20 kHz, 0 dBu |
| Maximum Input Level | +20 dBu |
| Digital Gain Range | 0 to −48 dB in 12 dB steps |
| Dynamic Range | 108 dB |
| Crosstalk | < −88 dB @ 20 Hz – 20 kHz, 0 dB |
| Connector | Euro-block, 3 × 6-pin 5 mm pitch |
| Power Supply | 100–240 VAC 50/60 Hz |
| Power Consumption | 27 W typical |
| Mounting / Dimensions | 19" rack 1U · 44 × 483 × 256 mm (H×W×D) |
| Weight | 5.245 kg |
ABT-MX12
Audio Matrix · 12 × 8The larger sibling of the ABT-MX6, expanding capacity to 12 analog inputs and 8 analog outputs for mid- to large-scale installations — conference centres, transport hubs, multi-tenant retail, and industrial sites with many zones and source devices. Identical DSP feature set, identical PC-software workflow, identical RD-port and Dante options, identical 1U form factor.
Choose ABT-MX12 over ABT-MX6 when input count exceeds 6 (multiple BGM sources, paging mics, alarm tones, telephone interface, line-level inputs from connected systems) or when up to 8 distinct output zones are required.
| Channels | 12 analog inputs / 8 analog outputs |
| RD Ports (Remote Device) | 4 — for microphones & controllers |
| Dante Support | Optional |
| DSP Functions | Level, EQ, dynamics, signal routing, presets |
| Input Impedance | 6.8 kΩ |
| Phantom Power | +48 VDC (±3 V) |
| Frequency Response | 20 Hz – 20 kHz @ 0 dBu ±1.5 dB |
| THD+N | < 0.03% @ 20 Hz – 20 kHz, 0 dBu |
| Maximum Input Level | +20 dBu |
| Digital Gain Range | 0 to −48 dB in 12 dB steps |
| Dynamic Range | 108 dB |
| Crosstalk | < −88 dB @ 20 Hz – 20 kHz, 0 dB |
| Connector | Euro-block, 3 × 6-pin 5 mm pitch |
| Power Supply | 100–240 VAC 50/60 Hz |
| Power Consumption | 27 W typical |
| Mounting / Dimensions | 19" rack 1U · 44 × 483 × 256 mm (H×W×D) |
| Weight | 5.290 kg |
Zone Microphones
Operator paging stations for ABT-MX6 and ABT-MX12 matrices — supporting both live PTT broadcasting and playback of pre-recorded messages stored in the microphone’s internal memory. Two interface styles: 4.3″ touchscreen (DM3) for flexible visual zone selection, or 6 dedicated buttons (DM6) for fast tactile recall in busy operator positions.
ABT-DM3
Touchscreen Zone MicrophoneA flexible zone microphone for live message broadcasting plus playback from internal memory. The 4.3″ touchscreen LCD displays available zones and groups, with a side-mounted knob for fast scrolling and a backlit PTT button for transmission — an LED on the button indicates active operation. Supports all matrix outputs and allows up to 64 zone groups to be defined for one-touch broadcasting.
Pre-recorded MP3 audio messages (up to 4 seconds each) are uploaded directly via the USB port — ideal for chimes, attention tones, and short pre-recorded announcements. Two RJ45 ports (RD IN to matrix, RD LINK for daisy-chaining) accept up to 100 m of CAT-5e cable each.
| Display | 4.3" touchscreen LCD |
| Controls | Scroll knob + backlit PTT button with LED |
| Zone Groups | Up to 64 |
| Live Broadcast | Yes (PTT) |
| Stored Audio | USB-uploaded MP3, up to 4 s per file |
| Microphone Input | 3-pin XLR (female) gooseneck |
| RD IN (to matrix) | RJ45 · CAT-5e · 100 m max |
| RD LINK (chaining) | RJ45 · CAT-5e · 100 m max |
| Power Supply | 15 VDC @ 800 mA |
| Phantom Power | 24 VDC @ 100 mA (software-switchable) |
| Dimensions | 166 × 162 × 53 mm (W×D×H) |
| Weight | 1.473 kg |
ABT-DM6
6-Button Zone MicrophoneA button-based zone microphone for live broadcasting and playback of pre-recorded messages stored in the microphone’s built-in memory — alarms, information messages, attention tones. Each of the 6 buttons can be individually defined as a zone-selection trigger or message-playback action via PC software connected to the audio matrix’s LAN port.
Supports up to 96 zone groups (vs. 64 on the DM3) for dense zoning in larger installations. Powered directly from the ABT-MX6/MX12 matrix over the same RD cable, eliminating the need for a separate PSU at the operator position.
| Buttons | 6 × programmable (zone selection or message playback) |
| Zone Groups | Up to 96 |
| Live Broadcast | Yes |
| Stored Audio | Built-in memory (alarms, info messages, audio files) |
| Programming | PC software via matrix LAN port |
| RD IN (to matrix) | RJ45 · CAT-5e · 100 m max |
| RD LINK (chaining) | RJ45 · CAT-5e · 100 m max |
| Power Supply | 24 VDC (15–40 VDC range), powered from matrix |
| Current Consumption | 120 mA |
| THD | 0.01 |
| SNR | 55 dB |
| Frequency Response | 200 Hz – 15 kHz |
| Operating Temperature | −5°C to +45°C |
| Dimensions | 243 × 170 × 53 mm (D×W×H) |
| Weight | 0.66 kg |
Public Address Power Amplifiers
High-efficiency Class-D amplifiers in two channel-count variants — 2×480 W and 4×480 W. Both offer 8 Ω or 100 V outputs, automatic standby for energy efficiency, per-channel logic outputs for fault diagnostics, and built-in protection against surges and overheating. 1U rack chassis for tight integration with the ABT-MX matrices.
ABT-PA2480AC / ABT-PA4480AC
Class-D Power AmplifiersTwo- and four-channel Class-D Public Address amplifiers delivering 480 W per channel into 8 Ω or 100 V loudspeaker lines. Class-D topology ensures high energy efficiency and excellent sound quality with low waste heat. A switchable high-pass filter (70 Hz cutoff when engaged) allows precise tailoring of low-frequency response to suit speaker type and venue acoustics.
Standby mode automatically powers the unit down in the absence of audio signal — minimising energy consumption during quiet periods. Per-channel logic outputs report fault conditions to the parent control system for fast identification and resolution. Built-in protection circuits guard against surges, overheating and other fault conditions, supporting professional use in conference halls, industrial sites, retail centres, and transport infrastructure.
| Specification | ABT-PA2480AC | ABT-PA4480AC |
|---|---|---|
| Channels | 2 | 4 |
| Rated Output | 2 × 480 W | 4 × 480 W |
| Speaker Output | 8 Ω & 100 V | 8 Ω & 100 V |
| Frequency Response (HPF off) | 20 Hz – 20 kHz (+1/−2 dB) | 20 Hz – 20 kHz (+1/−2 dB) |
| Frequency Response (HPF on) | 70 Hz – 10 kHz (+1/−3 dB) | 70 Hz – 10 kHz (+1/−3 dB) |
| Input | 0.775 V (0 dBu) balanced phoenix · 10 kΩ | 0.775 V (0 dBu) balanced phoenix · 10 kΩ |
| THD | < 0.1% (1 kHz / −3 dBv / 100 W) | < 0.1% (1 kHz / −3 dBv / 100 W) |
| S/N Ratio | > 80 dB | > 80 dB |
| Crosstalk | > 60 dB at 1 kHz, max output | > 60 dB at 1 kHz, max output |
| Power Consumption | 1150 W | 2250 W |
| Power Supply | 110 V & 230 VAC, 50–60 Hz | 110 V & 230 VAC, 50–60 Hz |
| Dimensions | 482 × 420 × 44 mm (W×D×H), 1U rack | 482 × 420 × 44 mm (W×D×H), 1U rack |
| Weight | 8.5 kg | 10 kg |
Controllers & Interfaces
User-facing controllers and network audio interfaces that complete the system. The ABT-WVC wall-mounted touchscreen provides remote zone control to facility staff; the ABT-DIO bridges Dante networks into the ABT-MX matrix backbone — or stands alone as a 2×2 audio processor.
ABT-WVC
Wall-Mounted Volume ControllerA wall-mounted 4.3″ touchscreen controller for remote operation of ABT-MX6 and ABT-MX12 matrices. Allows volume control, signal routing changes, preset recall, and live system-status monitoring. Real-time signal-level metering on the display and per-channel mute control put zone management directly into the hands of front-of-house staff.
Three diagnostic LEDs — blue PWR, green COMM, red FAIL — provide at-a-glance device status. Powered over the same RD cable that carries the data signal (24 VDC), so a single CAT-5e run from the matrix is all that’s required.
| Display | 4.3" touchscreen |
| Functions | Volume, audio routing, preset recall, system status |
| Status Indicators | Blue PWR · Green COMM · Red FAIL |
| RD IN (to matrix) | RJ45 · CAT-5e · 100 m max |
| RD EXP (linking) | RJ45 · CAT-5e · 100 m max |
| Power Supply | 24 VDC via RD port (PoE-style) |
| Dimensions | 196 × 45 × 128 mm (W×D×H) |
| Weight | 0.489 kg |
ABT-DIO
Dante Interface · 2 × 2 DSPA 2-input/2-output audio processor with built-in DSP and Dante connectivity, dedicated for use as a Dante interface or as an audio interface for the ABT-MX6/MX12 matrices. Distributes music signals, announcements and zone audio across networked sound-reinforcement installations. 24-bit signal processing at 48 kHz and 96 kHz sampling.
Two analog microphone/line inputs and two analog outputs provide phase adjustment, gain, EQ, compression, and delay. The Dante 2×2 interface transports audio over Ethernet, while advanced AEC (Acoustic Echo Cancellation) and FBC (Feedback Cancellation) algorithms ensure clean voice reinforcement. The DSP matrix routes signals flexibly under PC software control over Ethernet, with an RS-232 interface providing integration with third-party control systems.
| Architecture | 2 analog in / 2 analog out + 2 digital (Dante) in / out |
| DSP | 24-bit @ 48 / 96 kHz sampling |
| DSP Functions | Phase, gain, EQ, compression, delay, matrix routing |
| Algorithms | AEC (Acoustic Echo Cancellation) + FBC (Feedback Cancellation) |
| Network | Dante 2×2 over Ethernet (Primary + Secondary) |
| Control Interface | Ethernet (PC application) + RS-232 |
| Input Impedance | 10 kΩ |
| Phantom Power | +48 VDC (±3 V) |
| Frequency Response | 20 Hz – 20 kHz @ 0 dBu ±1 dB (A-weighted) |
| THD+N | < 0.03% typical (20 Hz – 20 kHz, 0 dBu, A-weighted) |
| Maximum Input Level | +20 dBu (±0.5 dB) |
| Digital Gain Range | 0 to +50 dB in 0.5 dB steps |
| Dynamic Range | 106 dB |
| Crosstalk | < −88 dB (20 Hz – 20 kHz, 0 dB) |
| Connectors | Euroblock 2 × 3-pin (3.5 mm pitch) |
| Power Supply | 15 VDC @ 800 mA (DC adapter) or PoE |
| Dimensions | 196 × 45 × 128 mm (W×H×D) |
| Weight | 1.8 kg |
Range Comparison
| Feature | MX6 | MX12 | DM3 | DM6 | PA2480AC | PA4480AC | WVC | DIO |
|---|---|---|---|---|---|---|---|---|
| Role | Matrix | Matrix | Mic | Mic | Amp | Amp | Controller | Dante I/F |
| In / Out | 6 / 6 | 12 / 8 | 1 mic | 1 mic | 2 ch | 4 ch | — | 2 / 2 |
| Power Output | — | — | — | — | 2 × 480 W | 4 × 480 W | — | — |
| Display | OLED | OLED | 4.3" touch | Buttons | LED | LED | 4.3" touch | LED |
| Zone Groups | — | — | 64 | 96 | — | — | — | — |
| Dante | Optional | Optional | — | — | — | — | — | 2 × 2 |
| Power | 100–240 VAC | 100–240 VAC | 15 VDC | From matrix | 110/230 VAC | 110/230 VAC | RD port | 15 VDC / PoE |
| Form Factor | 19" 1U | 19" 1U | Desktop | Desktop | 19" 1U | 19" 1U | Wall mount | Half-rack |
| Best For | Small/mid system | Mid/large system | Reception | Operator desk | 2-zone PA | 4-zone PA | Front-of-house | Dante bridge |