I am in Kingston upon Thames, South West London! I joined here in 2015 because as I bought a DAC and pair of class D monoblocks from an American company based in Colorado, called The Digital Amplifier Company. I suspect there are very few people in the UK using this kit. Sadly one of the power supplies for the monoblocks has recently broken and The Digital Amplifier Company no longer exists, it's founder and designer, Tommy O'Brien, sadly died during COVID. Tommy was an excellent chap and provided fantastic service but with his demise, it is unlikely that I willbe able to get the power supply repaired as I believe that Class D switching power supplies are rather specialised. I am currently wondering about replacing my Class D monoblocks with a more traditional class A or A/B stero amp.