IA 402D

I-Line offers two 2-channel class-D power amplifiers with switching mode power supply.

IA 402D provides 2x 200 Watts at 8 Ohms or 2x 400 Watts at 4 Ohms.

The amplifier is equipped with a digital encoder with push button for DSP preset selection, delay settings, EQ adjustments and more.

Sensor-controlled fan and optimized front-to-back air flow, together with very low idle power consumption, ensure low noise levels for quiet environments at all times.

A combination of XLR, speakON®- and Phoenix-connectors for in- and output ensures maximum flexibility during the installation process.



IA 402D power amplifier is equipped with 3 most widely used analog input and output connections in professional audio. 2 channel XLR inputs with link outputs together with Phoenix MSTB 3-pin inputs will cover most of the input needs. Outputs are equipped with 3x Neutrik speakON® connectors in parallel with 4-pin Phoenix MSTB connectors for maximum flexibility.


24bit/48kHz DSP processor provides all I-line speakers with correct and precise filter, EQ and limiter settings. As always - good sounding and well protected speaker systems are the ultimate aim of the SE AUDIOTECHNIK engineering team. Built-in speaker presets, EQ control, delay and other features allow for an easy, cost-effective and quick system setup and tuning.


Model:IA 402D
Type Class-D
Switched Mode Power Supply
Channels Two
Rated Output Power
(1kHz, THD: <1%)*
2 x 400 W @ 4 Ω
2 x 200 W @ 8 Ω
2 x 100 W @ 16 Ω
Minimum Load Impedance 4 Ω
Damping Factor > 200
Input Impedance 10 kΩ Balanced/Unbalanced
Maximum Input Level +20 dBu
SNR Line In to Spk Out: 90 dB
Noise Floor -52 dBu (A-weighted) @4 dBu Sensitivity
0 dB Master Attenuation
Channel Crosstalk 62 dB
THD+N < 0.1% @ 1 W,1 KHz
< 0.3% @ 1 dB below Rated Power
DSP 48 kHz, 24-bit DSP Ürocessor
Processing Latency: 1.1 ms
Protection Short Circuit
Cooling Sensor Controlled Fan
Front-To-Back Air Flow
Power Efficiency Up to 83%
Power Consumption Idle: 30 W
Full Power: 1000 W
Operating Voltage Range 100 – 240 VAC 50/60 Hz
Screen LCD
4x20 Symbol Alpha-Numeric
User Controls Control Encoder with Push-Button
Power On
Input Signal Connectors XLR-3 Female Line-Level Inputs
XLR-3 Male Link Outputs
Phoenix MSTP 3-Pin Inputs and Link Outputs
Output Signal Connectors Neutrik SpeakON® NL4 Outputs
Phoenix Contact MSTB 4-Pin Outputs
Power Connector IEC C14
DSP Features Levels
Parametric EQ
Input Sensitivity
RMS Limiter
Peak Limiter
IIR/FIR Filtering
Configuration Handling Loading of Factory Presets rovided by SE
Saving and Recalling of User Presets
Monitoring Temperatures
Product Dimensions [H x W x D] 66 x 483 x 256
1.5 RU
Net weight 5.1 kg
Packaging Dimensions [H x W x D] 143 x 588 x 380 mm
Total Weight 7.65 kg
Cabinet Aluminium Front Panel
Steel Body
Rack Mounting Four Frontal 6 mm Holes at both Sides
Operating Temperature Range 0°C - 40°C
Storage Temperature Range -40°C - 70°C

* According to IHF-A-202

All product specifications are subject to change without prior notice.



User manual

EU declaration of conformity - Audio Amplifiers (EN)