digiamps.com info

D250ASW 250W / 4 ohms     165x100x35mm 350g 115/230V AC
D500ASW 500W / 4 ohms     165x100x35mm 400g 115/230V AC
D1000ASW 1000W / 4 ohms 180x100x40mm 450g 115/230V AC
D2000ASW 2000W / 4 ohms 180x100x40mm 500g 115/230V AC

Lets look at the 1000ASW board, it is 100 x 180 x 40mm overall ( 4" x 7.2" x 1.6" high) , it is powered by 115V AC or 230V AC, it has a balanced input connector and a volume control connector, it has an expansion header for an active crossover + equalizer, it has a Channel-link connector where you can use 1 crossover card for 2 amplifier modules (like D1000ASW and a D250A).

It has a clock-link connector where you can sync 2 or more modules together for perfect clock sync , avoiding the beating common for self-oscillating amplifiers (they normally recommend that you skip the self-osc when you use 2 or more channels ;)

The output stage is a high power full-bridge design with high power fets driven by a fast high-current driver, the amplifier is a clock based design with a high precision clock. The clock can clock other channels in a multichannel setup and the power supply has a DC output connector to power 1-2 CAD 250A board. (or an additional D1000A board).

The PWM signal is made in our proprietary PWM processor using discrete components and we use overall feedback after the output filter as this gives very good audio performance.
EMI and RFI is very good indeed and power output is 1000W into 4 ohms and the amplifier is completely stable and has no problems driving 2 ohms.  
            
The amplifier has a number of protection circuits including a peak limiter, an over current shutdown circuit, an undervoltage / soft start circuit, an overtemp. shutdown circuit etc.
 

D1000ASW specifications
Freq. range ( -1dB) ; 20Hz - 20 kHz
Nominal load impedance;   4-16ohms
Output power (4ohms ) ; 1000W
THD ; <0.02% at 900W / 4ohms
Power requirements; 115/230V AC
Size 180 x 100 x 40mm
Weight 600g
Amplifier protection ;
Overcurrent shutdown,
peak limiter,
over temp shutdown
 

We have a new series of 2-CH amplifier boards with on-board SMPS

D200S-ASW – 2X200W/4 ohms or 400W/8 ohms
D300S-ASW – 2x300W/4 ohms or 600W/8 ohms
D400S-ASW – 2x400W/4 ohms or 800W/8 ohms
D600S-ASW – 2x600W/4 ohms or 1200W/8 ohms

All these modules are built on a backplate with integrated heatsink making them ideal for active speakers and very easy to use and install. They can of course be used for bi-amping (using the 2-ch mode of operation) or for higher power mono amplification. All modules are full range (20Hz – 20 kHz), specs and audio quality is again very good.