https://xaudiaelektrik.blogspot.com/2011/12/t-bone-rb500-reribbon-upgrade.html
Xaudia Microphone Blog: T-bone RB500 reribbon & upgrade
Ronnie at Diesel Studios in Italy sent in a pair of T-bone RB500 ribbon mics for service and upgrade. Ronnie asked for some photos of the ...
t bonemicrophoneblogupgrade