Hi, Paul,
Congratulations on your new Zen. People's stories about their experiences with the Zen amp seemed too good to be true, but have all proven true for me as well.
I ran into the same puzzle about bass extension and got a subwoofer (REL Strata III), which has solved the puzzle to my satisfaction.
In my experience, serial bridging (the recommended method for that amp) doubles hum. If you want to test this out, the instructions for serial bridging using a jumper are included with the amp, and the hum can be measured at the amp's speaker posts with a digital multimeter set to AC volts.
Good luck!
Congratulations on your new Zen. People's stories about their experiences with the Zen amp seemed too good to be true, but have all proven true for me as well.
I ran into the same puzzle about bass extension and got a subwoofer (REL Strata III), which has solved the puzzle to my satisfaction.
In my experience, serial bridging (the recommended method for that amp) doubles hum. If you want to test this out, the instructions for serial bridging using a jumper are included with the amp, and the hum can be measured at the amp's speaker posts with a digital multimeter set to AC volts.
Good luck!