TOA Electronics Ambient Noise Controller Module for 9000 Series - AN-001T

Product Overview

The TOA AN-001T is a 2-channel ambient noise controller module for the TOA 9000M2 and M-9000M2 CU Digital Matrix Mixer/Amplifier Series. It automatically adjusts system output gain in response to changing ambient noise levels — maintaining consistent speech intelligibility and appropriate volume in dynamic acoustic environments such as open offices, transit facilities, commercial lobbies, and multi-purpose venues.

Product Description

The AN-001T accepts input from up to two ambient noise sensing microphones — such as the optional TOA AN-9001 ceiling-mount mic — and uses 24-bit A/D sampling at 48 kHz to continuously evaluate room noise level. It then automatically adjusts the host amplifier's output gain within configurable min/max boundaries (–18 to –3 dB minimum; –15 to 0 dB maximum) using one of 14 selectable gain ratio presets, over a user-defined sample interval from 10 seconds to 5 minutes. Each of the two input channels can be independently assigned to control specific amplifier output zones, enabling zone-specific automatic volume management. Phantom power (+24 VDC) is provided on each input for condenser microphone use. A maximum of two AN-001T modules may be installed per amplifier chassis. The module is powered entirely by the host amplifier — no external supply is required. Explore the full TOA 9000M2 Series at Creation Networks.

Key Features

• 2-Channel Ambient Noise Sensing — Two independent sensor inputs allow separate ambient monitoring for two zones from a single module.
• Automatic Gain Adjustment — Continuously adjusts output gain to maintain consistent perceived loudness as room ambient noise changes.
• 14 Selectable Gain Ratio Presets — Precise control over how aggressively the system responds to changes in ambient noise level.
• Configurable Min/Max Gain Limits — Set minimum (–18 to –3 dB) and maximum (–15 to 0 dB) output boundaries to prevent over-amplification or loss of intelligibility.
• Adjustable Sample Time (10 s to 5 min) — Tune response speed to room dynamics, from fast-changing transit environments to gradual office noise shifts.
• +24 VDC Phantom Power — Built-in phantom power on each input for condenser ambient noise sensing microphones.
• 24-Bit A/D at 48 kHz — High-resolution analog-to-digital conversion for accurate ambient noise level detection.
• 9-Step Input Sensitivity — Adjustable from –60 dBV to –10 dBV to match a wide range of ambient sensing microphones.

Typical Applications

• Commercial meeting space
• Multi-purpose room
• Boardroom
• Conference room
• All-hands room
• Training room
• Government space

Technical Specifications

Frequently Asked Questions

How does the AN-001T improve sound system performance? It automatically raises or lowers output gain as ambient noise changes, keeping announcements and paging consistently intelligible without manual operator adjustment.

What microphone works with the AN-001T? The optional TOA AN-9001 ceiling-mount microphone is the recommended ambient noise sensor; other phantom-powered condenser microphones can also be used.

Can I control which zones the module affects? Yes — each of the two input channels can be independently assigned to control specific output zones within the 9000M2 or M-9000M2 amplifier.

How do I set the response speed? Configure the sample time from 10 seconds to 5 minutes depending on how quickly room noise changes and how fast the system should respond.

How many can I install per amplifier? A maximum of two AN-001T modules per chassis, supporting up to four independently monitored zones.

Does it need a separate power supply? No — it is powered entirely by the host amplifier at +24 VDC, –24 VDC, and +6 VDC.

What warranty applies? The AN-001T carries the TOA manufacturer warranty. Contact Creation Networks for support and 9000M2 system design.