Quote Originally Posted by MartinT View Post
For those who missed Stan's link, I bought one of these 12V rechargeable batteries and charged it up fully before powering the Bushmaster from it.



http://www.ebay.co.uk/itm/ws/eBayISA...E:L:OU:GB:1123

Listening to it tonight in place of the provided 12V Unifive SMPS, I am impressed. The whole sound has taken on more solidity, especially in the bass, and there is even less harshness with a sweet, extended treble. In fact, the treble quality with hi-res streams from the Logitech Touch is delicate, airy and resolved in a way that CD cannot manage. Brushed cymbal work is superb. The noise floor seems a little lower, bringing the music up from blackness in a very satisfying way.

Once again, as if it need be drummed into us, a linear PSU works wonders to lower the noise floor, enrichen the soundstage and reduce hash and lack of resolution compared with a switched mode PSU.

A second benefit is that the BM + battery becomes an excellent portable DAC/Headphone amp for use in the field or on travels. I dare say you could charge it from a car socket given the correct adapter. An absolute bargain.
Does it selfcharge while running the DAC off a battery or when it starts to run down do you have to charge it? Probably could find out if I went to the site and read but I figure you already know the answer so I'll just ask