Allen & Heath AHM-64 64x64 Audio Matrix Processor, 12x12 Local I/O, 2U

Allen & Heath AHM-64: The Flagship 64x64 Audio Matrix Processor for Large Installs

The Allen & Heath AHM-64 is a flagship 64x64 audio matrix processor built to route, zone, and process large-scale installed sound from a 2U rack, driven by a 96 kHz FPGA core for ultra-low latency. It is the DSP heart of a major installation, taking in dozens of sources and distributing processed audio to as many as sixty-four configurable outputs across a building's zones and speaker systems. With 12x12 local analog I/O, advanced processing including AEC and ANC, and expansion to 128x128 networked audio, it delivers console-grade capability with the reliability of a fixed-architecture processor. For integrators tackling stadiums, cruise ships, conference centers, and multi-purpose venues, the AHM-64 is the scalable engine that runs the entire building.

Why an FPGA Core Delivers Ultra-Low Latency at 64x64

At the center of the AHM-64 is an FPGA (field-programmable gate array) processing core running at a 96 kHz sample rate, an architecture that performs audio processing in parallel hardware rather than on a general-purpose CPU. That parallelism is why the AHM-64 can run a full 64x64 matrix with extensive processing while holding latency ultra-low and perfectly predictable, which matters when the same signal feeds distributed loudspeakers that must stay time-aligned. Unlike a live mixing console operated in real time, the AHM-64 is a fixed-configuration processor programmed once by an integrator, so its behavior is deterministic and stable every single day. The FPGA also gives Allen & Heath headroom to run advanced algorithms like AEC and ambient noise compensation across many channels at once. This is the engineering that lets one box carry an entire venue's audio without strain.

64 Configurable Outputs, Zoning, and Speaker Processing

The AHM-64 provides 64 configurable outputs that can be freely assigned to mono or stereo zones, each with dedicated speaker processing for crossovers, limiting, delay, and EQ tuned to the loudspeakers in that space. That flexibility lets a single processor drive a lobby, a main hall, breakout rooms, outdoor areas, and delay zones independently, each optimized and protected. Priority ducking automatically dips lower-priority sources when a page or emergency message arrives, then restores them, ensuring intelligibility without manual intervention. The routing matrix connects any of the system's inputs to any output with independent level and processing, so complex source-to-zone maps are built once and recalled reliably. This is the processing depth that large, mission-critical venues depend on.

Advanced DSP: AEC, ANC, Priority Ducking, and 8-Band PEQ

Beyond routing, the AHM-64 carries a deep processing toolkit including acoustic echo cancellation (AEC) for clean conferencing audio, ambient noise compensation (ANC) that automatically adjusts levels as a room's background noise rises and falls, priority ducking, and 8-band parametric EQ on channels. ANC is particularly valuable in spaces like transport hubs, restaurants, and sports venues where crowd noise changes constantly, because it keeps announcements and music consistently intelligible without an operator riding the level. AEC removes room echo from open microphones so remote conferencing participants hear clearly. The 8-band PEQ gives precise tonal control to fix room modes and tune each zone. Together these tools let the AHM-64 handle demanding paging, conferencing, and life-safety-adjacent applications that simpler processors cannot.

Scaling to 128x128 and Integrating With Any Control System

The AHM-64's expansion I/O port scales the system up to 128x128 networked audio channels, accepting an optional Dante 96 kHz card to put the processor on a large networked backbone shared with other devices across a facility. That growth path means a single AHM-64 can anchor a system that expands room by room as a building or campus develops. For control, Allen & Heath's IP1, IP6, and IP8 wall controllers and the Custom Control app give staff tailored interfaces, while GPIO, TCP/IP, and native Crestron, AMX, and Extron integration let the processor drop into any larger automation ecosystem. Programmers can trigger scenes, schedules, and macros from the building's control platform while staff make simple adjustments from wall panels. This combination of scale and integration is what qualifies the AHM-64 for the most complex installations.

Who the Allen & Heath AHM-64 Is For

The AHM-64 is for AV consultants and integrators designing large, mission-critical installed sound systems that demand high channel counts, advanced processing, and rock-solid reliability. If your project is a stadium, cruise ship, convention center, theme park, or multi-purpose venue with many zones, heavy paging and conferencing needs, and a requirement to scale, this flagship matrix processor is built for it. It expands to 128x128 over Dante, runs advanced DSP like AEC and ANC across many channels, and integrates with every major control platform. For the largest and most demanding installs, the AHM-64 is the 2U FPGA-powered processor engineers reach for when the whole building depends on the audio being right.