The TOA DP-L2 Digital Ambient Noise Controller is a professional-grade, rack-mountable audio processor designed to automatically adjust system volume based on ambient noise levels in real-time. Ideal for dynamic public environments such as airports, shopping malls, restaurants, and transit hubs, the DP-L2 ensures announcements and background music remain clear and intelligible without manual intervention.

Unlike conventional systems that simply raise output levels in response to noise, the DP-L2 features TOA’s advanced Automatic Level Control (ALC) algorithm, which intelligently adjusts the input signal to maintain optimal volume. This results in more consistent audio performance and reduces the need for manual adjustments.

Equipped with two balanced line inputs and outputs, an ambient noise sensor microphone input, and a monitor output, the DP-L2 supports a wide range of microphone types including ceiling flush-mount, dynamic, and condenser mics. A front-panel LCD display with metering and intuitive controls makes setup and monitoring easy, while a key-lock function prevents accidental changes. Backed by a five-year warranty, the DP-L2 is a reliable solution for ambient noise control in any commercial AV system.

Key Features – TOA DP-L2

  • Real-time Ambient Noise Compensation: Automatically adjusts system volume based on changing ambient noise

  • Advanced ALC Algorithm: Maintains consistent input signal level for superior audio clarity

  • Inputs & Outputs:

    • 2 Balanced Line Inputs and Outputs

    • 1 Ambient Noise Sensor Microphone Input

    • 1 Monitor Output

  • Microphone Compatibility: Supports ceiling, dynamic, and condenser microphones

  • Front-Panel LCD Interface: Easy setup and adjustment with level metering for input, output, ALC, and ANC

  • Key-Lock Protection: Prevents accidental changes to settings

  • Rackmount Design: Professional 1U form factor for easy integration

  • Ideal for Commercial Installations: Airports, malls, restaurants, transport hubs, and more

  • 5-Year Warranty: Long-term reliability and peace of mind

 

TOA DP-L2 CU SPECIFICATION

Power Source 110 - 120 V AC, 50/60 Hz
Power Consumption 20 W (300 mA)
Frequency Response 20 - 20,000 Hz, ±1 dB
Sampling Frequency 48 kHz
Dynamic Range Over 108 dB (IHF-A weighted)
Distortion Under 0.006%, 1 kHz, +4 dB* input/output (20 - 20,000 Hz BPF)
Input Sensor input (Ambient noise sensor microphone input)
: +4/-48 dB* changeable, 10 kΩ, electronically-balanced,
removable terminal block (4 pins),
phantom power (+15 V DC, can be turned on or off with Phantom switch)
with +15 V DC terminal
Input 1,2: +4/-8/-20 dB* changeable, 15 kΩ, electronically-balanced,
removable terminal block (3 pins)
Output Monitor output: +4 dB*, 600 Ω, electronically-balanced, removable terminal block (3 pins)
Output 1,2: +4 dB*, 600 Ω, electronically-balanced, removable terminal block (3 pins)
A/D Converter 24 bit
D/A Converter 24 bit

Signal Processing

Automatic Level Control Function Level meter (4 LED meters), Automatic input signal level control function,
Automatic input sensitivity setting function: +4/-8/-20 dB*,
Noise gate level setting: -99 to -3 dB
Ambient Noise Control Function Level meter (4 LED meters), BGM/Announce level control function,
Automatic sensor input reference level measuring function,
Sensor input reference level fine adjustment function,
Maximum output signal level control: -15 to 0 dB,
Minimum output signal level control: -18 to -3 dB,
Sample time setting: 10 s, 20 s, 30 s, 1 min, 5 min
Gain ratio setting: (Ambient noise: Output signal level) 6:3, 5:3, 4:3, 3:3, 3:4, 3:5, 3:6,
Ambient noise measuring frequency setting: 20 - 20,000 Hz, 3 points
Maximum Output Signal Level Control Function -12, -6, 0, +4, +6, +12, +18, +24 dB*
Input Level Indicator 8 LEDs indicator
Output Level Indicator 8 LEDs indicator
Other Feature Phantom power switch (sensor input), Key lock function,
Ground lift switch (INPUT 1, INPUT 2), Input/Output bypass function in power off
Operating Temperature 0℃ to +40℃
Operating Humidity Under 90% RH (no condensation)
Finish Pre-coated steel plate, black, 30% gloss
Dimensions 482 (W) × 44 (H) × 303 (D) mm
Weight 3.7 kg
Accessory Power cord (2 m)…1, Removable terminal plug (4 pins)…1,
Removable terminal plug (3 pins)…5
List price: $3,906.00
Price: $3,157.00
SKU: DP-L2 CU
Catalog: 
Processors & DSP
Brand: 
TOA
Dimensions: 23 in × 20 in × 6 in
Weight: 12 lb