The fan is a 0.06A 12VDC 4.7CFM 40x40x10mm fan, with ball bearings, and a resistor in series to slow it down even more. The manufacturer claims 24dBA at full speed in free space, and the added resistor drops that number quite a bit.

In some of the units, it's just a very quiet swoosh, in others there is a slight rumble that can be heard when the rest of the room is quiet. The fan is connected to the remote AMP output, so it switches off when the Empeg is absent or in standby. This part (like everything else inside) is user-accessible, for anyone who wants to fiddle with it.

Cheers