Video Conference | Audio DSP | ATD-402
ATD-402 - 2-Channel 150W DSP Amplifier
DSP Amplifier
ATD-402
All-in-one DSP amplifier with 2×150W output, 48V phantom power, AEC/AFS/ANS/AGC algorithms, and USB audio — purpose-built for classroom and education audio systems.
Product Description
The ATVI ATD-402 is a professional all-in-one digital signal processor and amplifier based on A-DSP architecture with 40-bit floating point processing, up to 400MIPS capacity, and 1600MFLOPS performance. It is purpose-built for educational environments, delivering 2×150W amplification with complete DSP signal management in a single 1U rack-mountable unit.
The unit provides four balanced analog inputs with 48V phantom power (10mA) supporting ceiling microphones and wireless receivers, plus four balanced analog outputs and amplified speaker outputs. A built-in USB 2×2 audio channel enables direct PC connection for interactive classrooms and live teaching with camera systems, with full recording capability via the USB channel.
Control is available via RS232, RS485, or UDP Ethernet commands with redundant primary and secondary Ethernet ports. DSP algorithms include Acoustic Echo Cancellation (AEC), Automatic Feedback Suppression (AFS), Automatic Noise Suppression (ANS), and Automatic Gain Control (AGC). Sixteen onboard presets allow instant scene recall, and an internal universal power supply (90V–264V) ensures worldwide compatibility.
Rear panel connections
Key Features
2×150W Amplifier
Delivers 2×150W/8Ω in stereo, or bridged mono output, for flexible room coverage.
48V Phantom Power
All four analog inputs supply 48V phantom power at 10mA for ceiling mics, condenser mics, and wireless receivers.
DSP Algorithms
Onboard AEC, AFS, ANS, and AGC provide echo cancellation, feedback suppression, noise reduction, and automatic level control.
USB 2×2 Audio
Connects directly to a PC for interactive teaching, camera-based live lessons, and USB recording without an extra audio interface.
Ethernet Control
Primary and secondary Ethernet ports with UDP commands, plus RS232 and RS485 serial ports for AV system integration.
16 Preset Recall
Store complete DSP configurations for instant switching between classroom modes, lecture layouts, or recording setups.
High-Performance DSP
A-DSP architecture with 40-bit floating point, up to 400MIPS and 1600MFLOPS, with latency under 3ms.
Universal Power Supply
Internal switch-mode supply accepts 90V–264V AC at 50–60Hz for worldwide deployment.
Rack Mountable
Standard 1U form factor (482×260×45mm) fits AV racks in classrooms, lecture halls, and training rooms.
Ideal For
Classroom Teaching
Ceiling mic and wireless mic integration with 48V phantom power
Live Online Teaching
USB 2×2 audio for PC connection with AEC and recording support
Multi-zone Audio
Amplified outputs for distributed speaker systems
AV System Integration
RS232/RS485/Ethernet control with 16 preset recall
Technical Specifications
| Audio Inputs & Outputs | |
|---|---|
| Analog Inputs | 4 (Balanced XLR / TRS) |
| Analog Outputs | 4 (Balanced) |
| Speaker Outputs | 2 Channels |
| USB Audio Channel | USB 2×2 (Stereo In / Stereo Out) |
| Phantom Power | 48V @ 10mA per input |
| Input Gain Range | 0 ~ 48dB (6dB steps) |
| Maximum Input Level | +18 dBu |
| Maximum Output Level | +18 dBu |
| Input Impedance | 5.4 kΩ (Balanced) |
| DSP & Amplifier | |
| Output Impedance | 300 Ω (Balanced) |
| Input Sensitivity | 2V |
| Frequency Response | ±0.5 dBu (20Hz ~ 20kHz) |
| THD+N (DSP) | < -100dB @ 4dBu |
| Input Dynamic Range | 110 dB |
| Output Dynamic Range | 112 dB |
| Sampling Rate | 48kHz |
| Audio Format | 24-bit |
| SNR | >80dB (20Hz~20kHz, A-weighted) |
| Crosstalk Isolation | 80dB @ 1kHz |
| Latency | < 3ms |
| DSP Algorithms | AEC, AFS (Feedback Suppression), ANS, AGC |
| Output Power (Stereo) | 2×150W / 8Ω |
| Amplifier THD+N | < 0.08% (0.1W to 1/2 Power) |
| Amplifier Input Impedance | 4.5 kΩ (Balanced) |
| Damping Coefficient | 500 @ 1kHz |
| Conversion Efficiency | 50V/μs @ 8Ω, input filter bypassed |
| Control & Interface | |
| Serial Control | RS232 × 1, RS485 × 1 |
| Network Control | Ethernet (Primary + Secondary, redundant), UDP |
| Presets | 16 Onboard Presets |
| DSP Architecture | A-DSP, 40-bit Floating Point |
| Processing Capacity | 400MIPS / 1600MFLOPS |
| General | |
| Dimensions | 482 × 260 × 45mm (1U Rack) |
| Working Power | 90V ~ 264V AC, 50 ~ 60Hz (internal universal) |
| Weight | 7 kg |
| Operating Temp. | 0°C ~ 40°C |
| Humidity | 10% ~ 90% RH (non-condensing) |
| Mounting | 1U Rack Mountable, 19" Standard Rack |
