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.
Well feck it, just when I solemnly promised my wife that Bushmaster will be the absolute last hi fi component I'll ever purchase!

There is absolutely no doubt in my mind that this battery improves the sound.