Hello friends, first time on the board. I recently began using a 104 plus. Why I spent so much on other mics through the years I have no idea. Should have done this to start with. The past list is somewhat impressive, but always lacking. AKG 535, Heil PR35, PR 22, PR 20, Sennheiser 441, EV RE510, Shure Beta 87, Blue 200 and 300 both. My question is this...I use slight compression via TC Helicon T1 singles. This is live in a very upscale restaurant/lounge...5 star. Allen and Heath mixwizard. The supplied voltage from helicon is 20 volts ...no on off. Is the 104 functioning properly? It sounds great. My ears say no problem. The board has 48v available. Doesn't seem to change the sound when depressed. Does the 104 actually need 48v?