If I wasn't a Topping fanboy before this will certainly cement it. I bought a STAX SR-L700MK2 a few years ago and a KGST for a stupid amount of money to drive them. Well the KGST went t_ts up after a year, with an untraceable, insane hum. I tried replacing the tubes but no luck. I couldn't find anybody, local to me, to fix it and it's such a heavy beast that just shipping and insurance was prohibitive given my reduced covid-era income. Now Topping (bless'em) has come to my rescue with a Three Hundred and Ninety freaking Nine dollar electrostatic amplifier! This is insanely cheap. I had the STAX SRM-D50 Electrostatic DAC/Amp but returned and it was $1200 (I thought it was underpowered). The IFI is $1500 and I have always been been unreasonably skeptical of a company that sound "iffy". Need less to say I will be adding EHA5 to Topping collection. Is there a Topping T-shirt I can get with it?