Updated relay board for classic Naim preamps. Turns on the relay at 23v after 5 second delay and turns off instantly at 22.5v for the best protection for your preamp. Reduces thumps during power interruptions. Functionally and physically exact drop-in replacement for NA325 board.

A special feature of this replacement is that the signal goes straight through the board when in the normal "play" mode (after the 5s delay time). Unlike the Naim original, the signal does NOT go through the relay contacts, so any potential degradation of the signal is avoided. During the delay period, the signal is grounded, which both mutes the output and also eliminates noise to your power amps.