Automatic and Accurate Input and Output Sound Level Adjustment
The DP-L2 CU is a digital audio processor with an ambient noise control (ANC) function that makes automatic changes in its output sound levels depending on the amount of surrounding noise, and an automatic level control (ALC) function that automatically adjusts the input signal level so it is appropriate at all times. BGM and announcements remain audible and understandable at all times, with no annoying loudness for customers and employees.
Output Excluded from Ambient Noise Sensing
The ambient noise sensor microphone enables accurate measurement of BGM/announcement listening-area noise levels. In addition, for complete accuracy, a DP-L2 feature exclusive to TOA automatically separates the unit's own output from the calculation of the ambient sound level, instead of just mixing all sound sources together, meaning that the output is not detected as noise. Additionally, a monitoring feature makes it possible to check the sound collected by the ambient noise sensor microphone.
Easy, Quick Installation and Simple Operation
The DP-L2 fits on a standard 1U size rack, so there is no time-consuming, complex installation procedure. All functions can be easily set from the unit's front panel, thanks to an LCD (liquid crystal display), keys and knobs. A key-lock function prevents accidental incorrect front- panel key settings, and there are also front-mounted LED meters for input/output signal levels, as well as ALC and ANC levels.
| Power Source | AC mains, 50/60Hz |
|---|---|
| Power Consumption | 20W |
| Frequency Response | 48kHz |
| Sampling Frequency | 20 — 20,000Hz, ±1dB |
| Dynamic Range | Over 108dB (IHF-A weighted) |
| Distortion | Under 0.006%, 1kHz, +4dB input/output (20 — 20,000Hz BPF) |
| Input | Sensor input (Ambient noise sensor microphone input): +4/–48dB* changeable, 10kΩ, electronically-balanced, removable terminal block (4 pins), phantom power (+15V DC, can be turned on or off with Phantom switch) with +15V DC terminal Input 1, 2: +4/–8/–20dB* changeable, 15kΩ, electronically-balanced, removable terminal block (3 pins) |
| Output | Monitor output: +4dB*, 600Ω, electronically-balanced, removable terminal block (3 pins) Output 1, 2: +4dB*, 600Ω, electronically-balanced, removable terminal block (3 pins) |
| A/D Converter | 24 bit |
| D/A Converter | 24 bit |
| Automatic Level Control Function | Level meter (4 LED meters), Automatic input signal level control function Automatic input sensitivity setting function: +4/–8/–20dB* Noise gate level setting: –99 to –3dB |
| 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 0dB Minimum output signal level control: –18 to –3dB 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 — 20,000Hz |
| Maximum Output SignalLevel Control Function | –12, –6, 0, +4, +6, +12, +18, +24dB* |
| 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 | O°C to +40°C |
| Operating Humidity | Under 90% RH (no condensation) |
| Accessory | Power cord (2m) x 1 Removable terminal plug (4 pins) x 1 Removable terminal plug (3 pins) x 5 |
| Finish | Pre-coated steel plate, black, 30% gloss |
| Dimensions (H x W x D) | 1.73" (44 mm) x 18.97" (482 mm) x 11.92" (303 mm) |
| Weight | 8.15 lbs (3.7 kg) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
