Ecler HADA-4B250 4-Channel 4 x 250W Networkable DSP Power Amplifier
DETAILS
The Ecler HADA-4B250 is a 4-Channel 4 x 250W Networkable Class D DSP Power Amplifier supporting low and high impedance loads, with a 4x4 digital matrix mixer, comprehensive onboard signal processing and full TCP/IP network control.
Delivering twice the output power of the HADA-4B150 for larger, more demanding fixed installation environments.
The Ecler HADA-4B250 is the higher-powered sibling of the HADA-4B150 within Ecler's HADA series of professional networkable DSP amplifiers, stepping up to four channels of 250W Class D amplification whilst retaining the same comprehensive digital signal processing, matrix mixing and network control capabilities that make the HADA series such a compelling choice for professional fixed installation audio systems.
Whether deployed in larger retail environments, educational facilities, corporate spaces, hospitality venues or public buildings requiring greater amplifier headroom and output capability, the HADA-4B250 delivers the power, flexibility and control that demanding installation projects require — all within the same compact 2RU 19" rack chassis as the HADA-4B150.
Greater Power, Same Flexible Output Configuration
The HADA-4B250 supports the same wide range of output configurations as the HADA-4B150 but with significantly increased power output. In standard stereo mode, all four channels deliver 250W into 4 Ohm or 8 Ohm low-impedance loads. In bridge mode, channel pairs deliver a substantial 500W into high-impedance 100V or 70V distributed speaker systems — making the HADA-4B250 equally well suited to driving demanding low-impedance speaker arrays and large-scale 100V line distributed audio installations. An additional operating point of 180W at 2.7 Ohm provides further flexibility for lower-impedance speaker configurations. Output mode selection per channel or channel pair is handled via the HADA DSP Manager software for precise and flexible system configuration. The improved crosstalk specification of greater than 80dB at 1kHz — compared to 60dB on the HADA-4B150 — reflects the higher-performance signal path of this more powerful model.
Advanced Onboard DSP via HADA DSP Manager
The HADA-4B250 shares the same advanced DSP engine as the HADA-4B150, built around a dual-core 64-bit processor with 96kHz/24-bit audio conversion and 113dB dynamic range. Per-channel processing includes parametric EQ, delay, limiter and multiband compressor on both input and output paths, with a 4x4 digital matrix mixer allowing any input to be routed to any output combination. All configurations can be saved as presets for rapid system recall. Signal processing latency is an extremely low 500 microseconds from analogue input to analogue output. The HADA DSP Manager application — accessible via Ethernet (100Mbps, CAT5 up to 100m) and an embedded web application — provides a comprehensive and intuitive interface for all device configuration, monitoring and control from a networked computer or control system.
Multiple Control Options
The HADA-4B250 offers the same generous range of control options as the HADA-4B150. Front panel rotary attenuators provide direct local level control for each output channel. Four rear panel GPI inputs (0–3.3V) enable remote volume control from external control devices, whilst an external MUTE input via dry contact closure allows system-wide muting from fire detection systems and other safety or control devices. Third-party control system integration is supported via TCP/IP, making the HADA-4B250 compatible with a wide range of building management and AV control platforms. A front panel RUN/SLEEP button enables standby mode for energy-efficient operation during periods of inactivity, with a standby power consumption of just 13W.
Comprehensive Protection & Monitoring
The HADA-4B250 is equipped with the same full suite of protection circuits as the rest of the HADA series, ensuring total reliability in continuous professional operation. DC protection, HF protection, short-circuit protection and thermal protection — with automatic output power reduction at 90°C and full mute at 100°C — safeguard both the amplifier and connected loudspeakers at all times. Per-channel front panel LED monitoring covers signal present, clip, limit, mute and protection status, with additional unit-level indicators for power on, data activity and external mute status. The temperature-controlled variable speed fan with front-to-back airflow operates at a maximum noise level of just 40dB at 1m — quieter than the HADA-4B150 — making it an especially practical choice for noise-sensitive installation environments.
Ecler HADA-4B250 Key Features:
- 4 x 250W @ 4Ω / 2 x 500W Bridge @ 100V/70V: High-power low and high impedance output configuration supporting both direct-drive and 100V line distributed speaker systems at double the output of the HADA-4B150.
- Class D Amplification: Efficient, high-performance Class D amplifier technology for reliable, low-heat continuous operation.
- Advanced Onboard DSP: Dual-core 64-bit processor with parametric EQ, multiband compressor, limiter and delay on all inputs and outputs via HADA DSP Manager.
- 4x4 Digital Matrix Mixer: Route any input to any output combination for flexible system design and signal distribution.
- 96kHz / 24-bit Audio Conversion: High-resolution audio processing with 113dB dynamic range and 500 microsecond analogue-to-analogue latency.
- Crosstalk > 80dB at 1kHz: Improved crosstalk performance over the HADA-4B150 for superior channel separation in demanding multi-zone installations.
- HADA DSP Manager Software: Full device configuration, preset management and monitoring via Ethernet and embedded web application.
- TCP/IP Third-Party Control: Compatible with a wide range of building management and AV control platforms via network.
- 4 x GPI Inputs: Remote volume control from external control devices via rear panel GPI (0–3.3V).
- External MUTE Input: Dry contact closure for integration with fire detection and other safety systems.
- Front Panel Attenuators: Direct local level control per output channel.
- Preset Management: Save and recall complete system configurations for rapid deployment and system recall.
- Comprehensive Protection: DC, HF, short-circuit and thermal protection for total reliability in any installation environment.
- Per-Channel LED Monitoring: Signal present, clip, limit, mute and protection status LEDs per channel.
- Quiet Fan Cooling: Temperature-controlled variable speed front-to-back airflow with maximum noise of just 40dB at 1m.
- Universal SMPS with PFC: 100–240V AC, power factor correction > 0.92 for efficient mains power usage.
- Standby/Sleep Mode: 13W standby power consumption for energy-efficient operation during periods of inactivity.
- Compact 2RU Format: 482.6 x 88 x 281.5mm for efficient use of rack space.
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Desktop & Rack Mountable: Includes desktop feet and 19" rack installation hardware as standard.
SPECS & DOWNLOADS
Ecler HADA-4B250 Specifications:
Download the PDF Data Sheet HERE >
Channels & Configuration
- Output Channels: 4
- Input Channels: 4 analogue
- Input Connection: 3-pin Euroblock (balanced), pitch 3.5mm
- Output Connection: 2-pin Euroblock
- Input Configuration: 4x4 digital matrix mixer
- Output Configuration: Lo-Z/Hi-Z, 70V/100V (bridge), 4Ω/8Ω (software selectable per channel/pair)
Output Power
- Max Output Power @ 8Ω: 250W (all channels driven, 1% THD)
- Max Output Power @ 4Ω: 250W (all channels driven, 1% THD)
- Max Output Power @ 2.7Ω: 180W (all channels driven, 1% THD)
- Max Output Power @ 4Ω Bridge: 500W (all channels driven, 1% THD)
- Max Output Power @ 8Ω Bridge: 500W (all channels driven, 1% THD)
- Max Output Power @ 100V: 500W bridge (all channels driven, 1% THD)
- Max Output Power @ 70V: 500W bridge (all channels driven, 1% THD)
Signal
- Voltage Gain: 30–37 dBV (32.2–39.2 dBu)
- Input Sensitivity: -12 to +12 dBV (-9.8 to +14.2 dBu)
- Input Impedance: 21kΩ (balanced)
- Max Input Level: 22 dBV (24.2 dBu)
- Frequency Response: 20Hz–20kHz (-3dB, 1W any load)
- THD+Noise: < 0.01% (0.015% typical @ 1kHz, 0.1W to full power)
- Crosstalk: > 80dB at 1kHz
DSP
- Processor: Dual-core 64-bit
- Sampling Rate: 96kHz
- Resolution: 24-bit
- Dynamic Range: 113dB
- Latency: 500 microseconds (analogue in to analogue out)
- Input Processing: Parametric EQ, delay, limiter, multiband compressor
- Output Processing: Parametric EQ, delay, limiter, multiband compressor
- Matrix Mixer: 4x4
- Preset Management: Yes, via HADA DSP Manager
Control & Connectivity
- Network: Ethernet 100Mbps (CAT5, up to 100m)
- Software: HADA DSP Manager (embedded web application)
- Third-Party Control: TCP/IP
- GPI Inputs: 4 x (0–3.3V), 5-pin Euroblock
- External MUTE: Dry contact, 2-pin Euroblock
- Front Panel Controls: 4 x attenuator knobs, RUN/SLEEP button
- Power ON/OFF: Rear panel switch
Monitoring (LED)
- Per Channel: Signal present (SP), clip, limit, mute, protect
- Per Unit: Power on, data, thermal, external mute
Protection
- DC Protection: Yes
- HF Protection: Yes
- Short-Circuit Protection: Yes (auto reset)
- Thermal Protection: Power reduction at 90°C, full mute at 100°C
Electrical
- Amplifier Class: Class D
- Power Supply: Universal SMPS with PFC (> 0.92)
- Mains Input: 100–240V AC, 50–60Hz (±10%)
- Mains Connector: IEC C14
- Power Consumption (Idle): 19W
- Power Consumption (Standby): 13W
- Cooling: Temperature-controlled variable speed fan, front-to-back airflow
- Maximum Fan Noise: 40dB at 1m
Physical
- Installation Format: 19" rack (2RU) or desktop
- Dimensions (W x H x D): 482.6 x 88 x 281.5mm
- Weight: 5.0kg
- Operating Temperature: 0°C to +40°C
- Operating Humidity: 5–80% RH, non-condensing
- Included Accessories: EU mains cord, Euroblock connectors, desktop feet, 19" rack installation hardware

