I purchased one off E-Bay from a seller here in the states for $28 and free shipping. Just search "Rechargeable 3800mah Li-ion 12V Battery Pack with DC Connector" on there and you will find it. I prefer the sound of the battery with my Lightspeed, for I get better focus with it. The cord that comes with it will work, but is a bit loose on the input to the Lightspeed. You can purchase the ends from Radio Shack or on on-line, and make your own cable like I recently did.
The Lightspeed is a very revealing attenuator, and will certainly let you hear the flaws of cables and everything else in your system. I can not suggest any cables I have heard under $50 that I liked, but there are some between $80-$100 that are quite good.
The Lightspeed is a very revealing attenuator, and will certainly let you hear the flaws of cables and everything else in your system. I can not suggest any cables I have heard under $50 that I liked, but there are some between $80-$100 that are quite good.