• Compact (1U) and lightweight Class D fixed installation amplifier

• Lo-Z (2, 4, 8 ohms), mono, stereo and bridge modes

• Universal SMPS (100 - 250 V AC) with PFC

The DAP SI-4.700 is a compact and lightweight 4-channel power amplifier for fixed installations. In a 1U rack space it delivers 4x 700 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.

Specifications

Outputs

2 ohms Stable                 Yes

Output per Channel into 8 ohms at 1 kHz                  450 W

Output per Channel into 4 ohms at 1 kHz                700 W

Output per Channel into 2 ohms at 1 kHz                      1000 W

Bridge Output into 8 ohms at 1 kHz                      1350 W

Bridge Output into 4 ohms at 1 kHz                     2000 W

Output Channels                  4

Output Mode               4-channel, Bridge, Mono, Parallel, Stereo

Output Connector                    Speaker Connector 4 pole

Inputs

Mono Inputs                   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

Electrical Specifications and Connections

Power Supply                  100-240 V AC 50/60 Hz

SMPS                     Yes

Power Consumption                     810 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                 5.2 kg (11.464 lb)

IP Rating                    IP20 (indoor use only)

Product Properties

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 Items

Included Cables                IEC cable

Included Accessories               Rubber feet