4 x 2500 w multi‑channel installation dsp class‑d amplifier

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  • 4 x 2500 W multi-channel installation DSP amplifier with digitally controlled PFC supply.
  • Fully integrated DSP with high-resolution 96 kHz processing and FIR Drive.
  • Dante and OCA integration via OMNEO with fallback options.
  • Parallel, bridged and parallel-bridged drive modes with 70/100V/140V/200V and low impedance operation
  • High efficiency Eco Rail technology for lower operating costs

IPX series are dedicated amplifiers for fixed install application such as e.g. stadiums, arenas, houses of worship, concert halls, theaters and other applications that require high‑power multichannel amplifiers with sophisticated speaker processing. The integrated DSP can run either in 48 kHz or true 96 kHz including FIR Drive. Besides analog inputs also Dante and OCA via OMNEO network inputs are available. Comprehensive fallback options allow redundant scenarios.

Each channel can be individually operated in low impedance mode, or 70V/100V Direct Drive mode. By bridging also 140V/200V Direct Drive is available. By the possibility to parallel two channels and parallel‑bridge four channels all kind of loudspeakers can be driven.

Due to the digitally controlled interleaved PFC supply reliable operation is ensured even under challenging mains supply situations. Reactive current is limited to a minimum, which reduces costs for mains installations and mains fusing in the installation.

In case of idle mode or light mode operation IPX series amplifiers automatically switch to a lower Eco Rail further reducing operating costs. In Eco Mode the amplifiers stay fully functional and supervised.

While IPX series amplifiers are fully integrated in IRIS‑Net, a OLED display on the front panel allows quick local control and supervision of the amplifier.

The connectivity of IPX series amplifiers is optimized for fixed install applications.


Low-Z mode: Load Impedance 2 Ω 2.7 Ω 4 Ω 8 Ω
Maximum Output Power1
Normal Mode, all channels driven 2600 W 3000 W 2500 W 1250 W
Bridge - - 5200 W 5000 W
Parallel 5000 W 4000 W 2500 W 1250 W
Parallel-Bridge 10400 W 12000 W 10000 W 5000 W
Direct Drive Mode: Nominal Voltage 70 V 100 V 140 V2 200 V2
Maximum Output Power1 2500 W 2500 W 5000 W 5000 W

Number of Amplifier Channels 4
Maximum Output Voltage, Normal mode, per channel 150 Vpeak
Maximum Output Current, Normal mode, per channel 53 Apeak
Voltage Gain
Low-Z mode, ref.1kHz 32.0 dB, adjustable 20.0-44.0 Db
Direct Drive mode 33.2/36.2/39.2/42.2 dB for 70/100/140/200 V
Input Sensitivity
Low-Z mode, Max. Output Voltage 10.7 dBu (2.66 V), adjustable -1.3-22.7 dBu
Direct Drive mode 6 dBu (1.55 V), fixed
THD3 dB below max, AES17, 1 kHz < 0.05 %
DIM 1003.15 kHz, 15 kHz < 0.15 %
IMD-SMPTE60 Hz, 7 kHz < 0.05 %
Crosstalk ref. 1 kHz, 12 dB below Max, 8 Ω < -80 dB
Frequency Responseref. 1 kHz, analog into speaker out 20 Hz to 20 kHz (±0.5 dB)
Damping Factor 20 Hz to 200 Hz, 8Ω > 400
Output Stage Topology Class D, fixed frequency
Signal to Noise Ratio Amplifier
A-weighted, analog input 112 dB
A-weighted, digital input 115 dB
Output Noise
A-weighted, analog input < -70 dBu
A-weighted, digital input < -73 dBu
Analog Audio Input/Thru
Type 2 x 6-pin Euroblock, male
Maximum Input Level +21 dBu
Input Impedance, active balanced 20 kΩ
Reference level equal to digital input +21 dBu for 0 dBFS
Speaker Output 1 x 8-pin Euroblock, 6 mm, female
Power Consumption
Rated power consumption (see BTU table) 1200 W
⅛ Maximum Output Power at 4 Ω 1765 W
Idle Mode (no input signal) 80 W
Standby Mode < 16 W
Dimensions (W x H x D), mm 483 x 88.1 x 514.2
Weight 15.0 kg (33.0 lb)
Shipping Weight 17.2 kg (37.8 lb)
Sampling rate 48 kHz/96 kHz, OMNEO/Dante synchronized
Signal delay/latency Analog In to Speaker Out, 48 kHz/96kHz 0.70 ms/0.53 ms
Dante Network Latency typ. 1.00 ms
Signal Processing
User EQ 12 filters per channel, selectable as PEQ, Lo-Shelv, Hi-Shelv, Lo-ShelvQ, Hi-ShelvQ, Hi-Pass,Lo-Pass & Notch; 2 filters of them with additional asymmetric filter type
User Delay 0 to 2000 ms per channel (units: μs, ms, s, cm, m, inches, feet)
Array EQ 5 filters per channel, selectable as PEQ, Lo-Shelv, Hi-Shelv, Lo-ShelvQ, Hi-ShelvQ, Hi-Pass, Lo-Pass, & All-Pass
Array Delay 0 to 500 ms per channel (units: μs, ms, s, cm,m, inches, feet)
Speaker EQ 10 filters per channel, selectable as PEQ, Lo-Shelv, Hi-Shelv, Hi-Pass, Lo-Pass & All-Pass
Speaker X-Over Hi-Pass, & Lo-Pass per channel,6/12/18/24/30/36/42/48 dB Bessel/Butterworth,12/24/48 dB Linkwitz-Riley; Alignment Delay, 0 to 20 ms per channel
Speaker FIR Up to 1025 taps, Linear Phase Filter, Linear Phase Brickwall X-Over
Speaker Limiters Peak Anticipation Limiter & RMS/TEMP Limiterper channel
Other Functions Source Selection & Mix, Level, Mute, Polarity, Sine & Noise Generator, Pilot Tone Generator & Detection, Level Meters, Impedance Measurement & Load Monitoring
DSP Presets 1 Factory + 20 User
Speaker-Pool Presets 30 Speaker Settings
Source Supervision & Fallback Pilot Tone supervision at Analog & OMNEO/Dante inputs, switch over to alternative Source Selection
Type 2 x Neutrik EtherCON/RJ45, redundant PRIMARY/SECONDARY
General 1000base-T/100base-TX, integrated switch
Network Audio Inputs 8 channels, 48/96 kHz, OMNEO/Dante format
Network Audio Outputs (Monitor) 2 channels, 48/96 kHz, OMNEO/Dante format
Mains Input 1 x Neutrik powerCON-HC
GPIO Control Port
Type 1 x 8-pin Euroblock, male
Ports & Operating Modes 3 x GPIO, switchable Analog In/Digital In/Digital Out
Analog Input Range 0 V to +13 V, 40 kΩ input resistance
Digital Input Limits ON: < 1.5 VOFF: > 2.0 V, internal Pull Up (10 kΩ)
Digital Outputs ON: Output switched to GND, max. 200 mA OFF: Open Collector (40 kΩ to GND)
Reference Voltage Output +10 V, max. 200 mA, supervised, short circuit protected
READY/FAULT contact Galvanic isolated relay, max. 30 VDC/500mADC
User Interface
Display Black/white OLED 256 x 64 pixel
Front panel indicators 4 x status LEDs (POWER, STANDBY, FAULT, OMNEO)
Front panel operating elements 3 buttons (UP, ENTER, DOWN)
Rear panel indicators 1 x status LED (STATUS)
Rear panel operating elements Mains Switch
Power Requirements 100 V to 240 V, 50 Hz to 60 Hz AC
Power Supply Topology Switching Mode Power Supply with digital controlledPower Factor Correction
Protections Audio Limiters, High Temperature, DC, HF, Short Circuit, Back-EMF, Peak Current Limiters, Inrush Current Limiters, Turn-on Delay, Mains Circuit Breaker Protection, Mains Over-/Undervoltage Protection
Cooling Front-to-rear, temperature controlled fans, supervised
Ambient Temperature Limits +5 °C to +40 °C (+40 °F to +105 °F)
IEC Protection Class Class I (grounded)
Electromagnetical Environment E1, E2, E3
Color Black
Amplifier at rated conditions, Low-Z Normal operation mode, all channels driven, 4 Ω loads, Analog input, 32dB Gain, 48 kHz sample rate, unless otherwise specified.
1Test signal for max. output power according IHFA-202 (Dynamic-Headroom, burst 1 kHz/20 ms on/480ms off/low level -20 dB).
2Available in Bridge operation mode only.


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