Product was successfully added to your shopping cart.

Go to cart page

You have successfully subscribed to this product. You will receive an email when the product is in stock.

2 x 30w audio power amplifier

Velleman K4003: Audio Power Amplifier Kit - 2 x 30 W

Velleman K4003

Audio Amplifier Board - 2 x 30 W

Build your own amplifer with the Velleman K4003: Audio Power Amplifier Kit. This easy-to-assemble kit will get you the compact amplifier you need for no-distortion sound. The K4003 is constructed with TDA2616 integrated circuits, which are short-circuit protected. The supply capability for this amplifier maxes out at 2 x 15W rms (at 4ohm) or 2 x 10W rms (at 8ohm). Alternating current can be connected directly to the unit, so an additional rectifier and filter for smoothing are not needed!

Looking for a preassembled version of the K4003? Take a look at the Velleman VM113: Audio Power Amplifier Module.



Power Output 2 x 30 W / 4 Ohm
Total Harmonis Distortion 0.07% (1 W / 1 kHz)
Channel Separation 70 dB
Frequency Response 7 Hz to 60 kHz (-3 dB)
Signal-to-Noise Ratio 98 dB (A weighted)
Input Sensitivity 300 mV / 150 kOhm
Supply Voltage 2 x 12 VAC / 2A (50 W transformer recommended)
Dimensions 2.8 in. x 2 in.

Additional Information

Difficulty Level 1


Parts list
English assembly instructions through illustrations, pictures, etc.

Assembly instructions
Written multilingual manual explaining how to build the kit

Info Sheets

Resistor colour code

Connection diagram of the 2 x30W power amplifier

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product