Monday to Friday 8:30 - 17:00
Description
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.
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
Inputs - Mono Inputs x 4
Mono Input Connector - 3-pin XLR
Mono Input Impedance - 20000 Ω
Balanced Mono Input Sensitivity - 32 dBu
Audio Specifications - THD Level < 0.05 %
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
Power Supply - 100-240 V AC 50/60 Hz
SMPS - Yes
Power Consumption - 1075 W
Power Connector In - IEC
Mechanical Specifications
Height (mm) - 45 mm (1.772″)
Width (mm) - 483 mm (19.016″)
Length (mm) - 296 mm (11.654″)
Installation Depth (Excl. Connector) - 296 mm (11.654″)
Flightcase Size - 19"
Rack Units - 1 U
Housing - Steel
Colour - Black
Finish - Powder Coating
Weight - 5.5 kg (12.125 lb)
IP Rating - IP20 (indoor use only)
Electronic Protection
Clip limiter, DC voltage, Overheat, Overload, Under voltage
LED Indicators
Clip, Power, Protect, Signal
Thermal Specifications
Maximum Ambient Temperature
40 °C (104 °F)
Minimum Ambient Temperature
-15 °C (5 °F)
Maximum Surface Temperature
70 °C (158 °F)
Included Cables - IEC cable
Included Accessories - Rubber feet
This is offered on all products regardless of order value to all mainland UK postcodes. Your purchase will be with you within 3 working days of your order being placed. If you are in the Scottish Highlands, Northern Ireland, Isle of Man and the Channel Isles you will still get free delivery but your order may take up to 5 working days to get to you.
Absolutely! At check out you can select the option that suits you best.
We offer Next day, Saturday, Pre-10am and Pre-12pm delivery.
Unfortunately these options are not yet available for customers in the Scottish Highliands, Northern Ireland, Isle of Man and the Channel Isles.
If you place your order before 3pm Monday-Friday, we will dispatch the same day.
For more information, including International delivery please click here.
Our returns department aims to help you as quickly as possible with any issues you may have with your product.
Please click here for more information on returning products.