Pine Marten
pfm Member
I have 2 monoblock Avondale NCC220+Minicap6 power amps in Naim 110 boxes, original transformer, mains switch etc. I switched off the amps and as usual, the LEDs gradually whent out and there was a tiny "plop" from each speaker in quick succession about 20 seconds later. This is normal. I then switched off the HiCap. I dont leave the gear running as I know I wont have time to listen properly to music again till next weekend. About 2hours later I heard a distinct click or crack, like the sound I sometimes get when the fridge starts up, it was certainly from the rh speaker! Now, I removed the speaker leads and with my DMM measured 40mV dc, which slowly fell by degrees to 10mV over about 15 mins. BTW the rh speaker has the longest straight length of NAC5, 4m ish, the lh run is taped up in a folded bow tie shape bundle to cancel out induced currents etc. Equipment is powered from the standard ring main, there being only one, as the hovel only has three rooms+ bathroom. Supply to the house is overhead and at least 8 other properties share the same phase. Should I be worried? It never happened with the standard monoblock 110's! Comments please?