Photos of CTA builds
Prototypes
Prototype #1
This is the prototype of the CTA12, built using the transformer, power supply and heatsink of a faulty Kenwood KR-A4040 amplifier.
Prototype #2
The prototype of CTA14 was made on the PCB of an LDA17 amplifier, which I did not photograph until after I soldered the output transistors out of it.
Builds by other persons
Andreas from Freiburg, Germany (July 2023)
Andreas has purchased the CTA MID kit, which includes 2 CTA14 amplifiers and solid state relays with full independent protection for the two channels. As you can see in the pictures, he used a separate transformer to generate the positive and negative supply voltages for the amplifier, which of course can be done with a single transformer. The 2 DPB protection circuits are located under the power supply panel, not visible in the picture. The external heatsink, painted black, helps to ensure efficient cooling.
Andreas listens to B&W CM4 floorstanding speakers, and this is what I got from him:
"The sound is great. The heatsink gets only a few degrees warmer when I celebrate a party. The amp is directly connected with my computer and I bought a USB remote control to adjust the volume from my sofa."
