hand made quad 405 amps

Quad not only made electrostatic speakers in the 70’s. They made a 100 watt class A amp specifically to drive them. Naturally it would be a crime to drive them with anything but this amp. thankfully the design has been replicated in china and even improved upon. they can be ordered as a kit on ebay. The listing wasnt especially clear, and the price was alarmingly cheap, leading to me ordering twice as many as i required. but we built them all the same, and im sure in time i will find a way to use them for something good.

future work:

• I still need to build enclosures for these ( perhaps a nice job for the techshop water jet )
• I may make one unit old school monobloc and another stereo unit combining a preamp giving me a chance to experiment with digital potentiometers.