DAP-Audio SI-4.900 4x 900 W install amplifier

The DAP SI-4.900 is a compact and lightweight 4-channel power amplifier for fixed installations. In a 1U rack space it delivers 4x 900 W into 4 ohms, is capable of driving 2-ohm loads and can be bridged for even more power. It is designed for low impedance and high current with excellent stability.
It has a clip limiter and DC output protection to prevent damage to the loudspeaker. Output overload and short-circuit protection protects the amplifier from faults, as does over-temperature protection and high-temperature power attenuation.
Signal, Clip, Fault and Power LEDs indicate the status of the amplifier. The output level can be adjusted for each channel using the volume controls. Gain can be set on the rear panel for 0.775 V input or 32 dB gain, and a mode switch selects stereo, mono and bridge modes.
The universal switching power supply uses active PFC and soft-switching technology, accepts input voltages from 100 - 250 V AC and is optimised for the audio power amplifier.Technical data:

2 ohms Stable:	Yes
Output per Channel into 8 ohms at 1 kHz:	600 W
Output per Channel into 4 ohms at 1 kHz:	900 W
Output per Channel into 2 ohms at 1 kHz:	1350 W
Bridge Output into 8 ohms at 1 kHz:	1800 W
Bridge Output into 4 ohms at 1 kHz:	2700 W
Output Channels:	4
Output Mode:	4-channel / Bridge / Mono / Parallel / Stereo
Output Connector:	Speaker Connector 4 pole
Mono Inputs:	4
Mono Input Connector:	3-pin XLR
Mono Input Impedance:	20000 Ω
Balanced Mono Input Sensitivity:	32 dBu
THD Level %:	Signal-to-noise Ratio:> 100 dB
Slew Rate:	50 V/μs
Amp Technology:	Class D
Damping Factor:	1000:1
Crosstalk:	75 dBu
Frequency Response Minimum:	20 Hz
Frequency Response Maximum:	20000 Hz
DSP:	No
Power Supply:	100-240 V AC 50/60 Hz
SMPS:	Yes
Power Consumption:	1075 W
Power Connector In:	IEC
Height (mm):	45 mm
Width (mm):	483 mm
Length (mm):	296 mm
Installation Depth (Excl. Connector):	296 mm
Flightcase Size:	19"
Rack Units:	1 U
Housing:	Steel
Colour:	Black
Finish:	Powder Coating
Weight:	5.5 kg
IP Rating:	IP20 (indoor use only)
Electronic Protection:	Clip limiter / DC voltage / Overheat / Overload / Under voltage
LED Indicators:	Clip / Power / Protect / Signal
Maximum Ambient Temperature:	40 °C
Minimum Ambient Temperature:	-15 °C
Maximum Surface Temperature:	70 °C
Included Cables:	IEC cable
Included Accessories:	Rubber feet