$89.95 MSRP inc.GST

Redback – K 5181 – KIT CLASSIC-D AM P 250W @ 4OHM

(Silicon Chip Magazine Nov ’12) This high specced power amplifier operates in Class ‘D’ as opposed to earlier amplifiers which run in the more conventional Class ‘AB’ or Class ‘A’. The new Class ‘D’ amplifier offers the extremely low distortion figures of a Class ‘A’ whilst still having the efficiency of a standard class’AB’ amplifier. This simple to build kit with its 250W into 4Ω output will make an ideal subwoofer or front floorstanding speaker driver in a home cinema setup. 

Important Note For Kit Buyers: 
This product is supplied in component form and requires soldering, drilling, and assembly. We recommend users are familiar with at least basic electronic principles and have the ability to solder.


  • High efficiency
  • high power
  • Low distortion and noise
  • Bridging option for driving 8Ω loads with two modules
  • Over-current protection
  • Over-temperature protection
  • Under-voltage switch-off
  • Over-voltage switch-off
  • DC offset protection
  • Fault indicator
  • Amplifier running indicator
  • Optional speaker protector module

Why buy an Altronics Kit?
Altronics kits are premium do-it-yourself projects designed to be assembled with ease. However, basic electronics knowledge and soldering skills are essential to construct our kits. A difficulty rating is provided to help determine if your ability is sufficient to build the kit project. Please note, once assembly has been commenced we are unable to honor any warranty claims. Please see the full details here.