IPX5:4

4 x 1250 w multi‑channel installation dsp class‑d amplifier

4 x 1250 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.

Specifications

Amplifier Model	IPX5:4
OUTPUT POWER
Low-Z mode: Load Impedance	2Ω	2.7Ω	4Ω	8Ω
Maximum Output Power¹
Normal Mode, all channels driven	1300 W	1500 W	1250 W	1250 W
Bridged	-	-	2600 W	2500 W
Parallel	2500 W	3000 W	2500 W	1250 W
Parallel-Bridged	5200 W	6000 W	5000 W	5000 W
Direct Drive Mode: Nominal Voltage	70 V	100 V	140 V²	200 V²
Maximum Output Power¹	1250 W	1250 W	2500 W	2500 W
Number of amplifier channels	4
Maximum Output Voltage, Normal mode, per channel	150 V_peak
Maximum Output Current, Normal mode, per channel	41 A_peak
AMPLIFIER
Voltage Gain
Low-Z mode, ref. 1 kHz	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
THD 3 dB below max, AES17, 1 kHz	< 0.05 %
DIM 100 3.15 kHz, 15 kHz	< 0.15 %
IMD-SMPTE, 60 Hz, 7 kHz	< 0.05 %
Crosstalk ref. 1 kHz, 12 dB below Max, 8 Ω	< -80 dB
Frequency Response, ref. 1 kHz, analog in to speaker out	20 Hz to 20 kHz (±0.5 dB)
Damping Factor, 20 Hz to 200 Hz, 8 ±	> 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
CONNECTIVITY
Analog Audio Input/Thru
Type	2 x 6-pin Euroblock, male
Maximum Input Level	+21 dBu
Input Impedance, active balanced	20 ㏀
Reference level equal to digital input	+21 dBu for 0 dBFS
Speaker Output	1 x 8-pin Euroblock, 6mm, female
GENERAL
Power Consumption
Rated power consumption (see BTU table)	700 W
⅛ Maximum Output Power at 4 Ω	900 W
Idle Mode (no input signal)	75 W
Standby Mode	< 15 W
Dimensions (W x H x D), mm	483 x 88.1 x 514.2
Weight	14.3 kg (31.5 lb)
Shipping Weight	16.5 kg (36.4 lb)
DIGITAL SIGNAL PROCESSING
Sampling Rate	48 kHz / 96 kHz, OMNEO/Dante synchronized
Signal delay/latency Analog In to Speaker Out, 48 kHz/96 kHz	0.70 ms / 0.53 ms
Dante Network Latency	typ. 1.00 ms
Signal Processing
User EQ	12 filters per channel, selectable as PEQ, LoShelv, Hi-Shelv, Lo-ShelvQ, Hi-ShelvQ, HiPass, 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, LoShelv, Hi-Shelv, LoShelvQ, HiShelvQ, 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, LoShelv, Hi-Shelv, Hi-Pass, Lo-Pass & All-Pass
Speaker X-Over	Hi-Pass, & Lo-Pass per dB channel, 6/12/18/24/30/36/42/48 dB Bessel/ Butterworth, 12/24/48 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 Limiter per channel
Other Functions	Source Selection & Mix, Level, Mute, Polarity, Sine & Noise Generator, Pilot Tone Generator & Detection, Level Meters, Impedance Measurement & Load Monitoring
Memory
DSP Presets	1 factory preset + 20 user presets
Speaker-Pool Presets	30 speaker settings
Source Supervision & Fallback	Pilot Tone supervision at Analog & OMNEO/Dante inputs, switchover to alternative Source Selection
CONNECTIVITY
Network
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 ㏀ input resistance
Digital Input Limits	ON: < 1.5 V / OFF: > 2.0 V, internal Pull Up (10 ㏀)
Digital Outputs	ON: Output switched to GND, max. 200 mA OFF: Open Collector (40 ㏀ to GND)
Reference Voltage Output	+10 V, max. 200 mA, supervised, short circuit protected
READY/FAULT contact	Galvanic isolated relay, max. 30 VDC/500 mADC
GENERAL
User Interface
Display	Black/white OLED 256 x 64
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 controlled Power 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-/Under voltage 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, 32 dB 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 / 480 ms off / low level -20 dB). ²Available in Bridged operation mode only.