15 Watt x 2 Class D Audio Amplifier Kit


DIY kit uses TPA3122D2 Stereo Power Amp IC
Easy to assemble kit using through-hole components
Requires no heatsink when playing music
Small 2" x 3" footprint
Operates on 10-30 VDC
Volume control
RCA input jacks
Screw terminal power and speaker connections
Easy selection of stereo or bridged mono operation
30 watts bridged @ 24v with 8 ohm load

KAA03021 Parts KAA03021 KAA03021 Pcb
Click to enlarge

A great little digital audio amplifier, it's super efficient design draws only 30 ma @ 12 volts when idling. The TPA3122D2 ic comes from Texas Instruments and features automatic thermal and short circuit protection. It doesn't require a heatsink when playing music so it will not burn your fingers like analog amplifiers. I've hooked this amp up to 3-way floor speakers with a 10" woofer and was amazed at the volume level, sound quality and punch from one little ic, I know you won't be disappointed.

This new version (revision 2.20 released Oct. 17th 2014) contains on-board jumpers for easy stereo or bridged (mono) configuration.

What’s Included in the kit:

  • 1 - High quality PC Board
  • 1 - TPA3122 Class-D Audio Power Amp IC
  • 4 - 470ufd Electrolytic Capacitors
  • 2 - 10ufd 10v Ceramic Capacitors (106)
  • 2 - 1ufd 50v Ceramic Capacitors (105)
  • 2 - 0.68ufd 50v Ceramic Capacitors (684)
  • 2 - 0.22ufd 50v Ceramic Capacitors (224)
  • 3 - 0.1ufd 50v Ceramic Capacitors (104)
  • 1 - 10ufd 35v Electrolytic Capacitor (105)
  • 3 - 4.7k ¼ Watt Resistors (yellow, violet, red)
  • 2 - 47k ¼ Watt Resistor (yellow, violet, orange)
  • 1 - 10k Variable Resistor
  • 2 - 22uh Inductors
  • 1 - LED
  • 1 - Spacer for LED
  • 3 - 2 Position Terminal Blocks
  • 2 - Phono Jacks
  • 4 - PCB Standoffs

What you will need:

  • Good quality soldering iron 25 – 40 watt
  • Solder tip cleaning sponge
  • Rosin core or no clean solder
  • Diagonal wire cutter
Ordering Options:
KAA03021 15 watt x 2 Class-D Audio Amplifier

Assembly Manual Rev 1.00 PDF format.
Assembly Manual Rev 2.20 PDF format.

TPA3122 Data Sheet PDF format.

$22.95 each $2.00 shipping for USA addresses only, for addresses outside USA email for shipping charges.