If I'm correct, the ah is based on a marantz cdp. With that said, marantz volumes are not so good. They jump too much in steps and always revert back to a fixed level when turned off. You need in infinitely variable volume control, not one with 6-12 steps. You also need a volume that won't blast you out of the room when you forget to turn down the volume after turning it on.
Both Denon and Sony ES have better built in volume controls from my experience.
If you like your cdp, get something simple that will be transparent like a Creek OBH-12 passive pre-amp.
