^ Yes, although it's barely noticeable. I can only hear it when the engine is not running, the windows up, and the extremely quiet passages. I think it is a result of the Waywell putting out a higher level than the factory amp under the seat is designed for (either that or just a crappy amplifier design in the Waywell).
I looked at bypassing the factory amp as the Waywell's 4x45W would be enough for me, but the crossovers are built into the amp, so it would mean getting some more crossovers or disecting the amp. The waywell also has line outs, but the stupid factory amp only has speaker level inputs, so there goes another idea.