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Lightspeed attenuator lithium battery pack

I'm going to pick up a lightspeed attenuator but am not certain which 12vdc lithium battery packs on e-bay have 2.5 mm, center positive, plugs. They aren't listed anywhere and I can't figure out how to contact the sellers to ask them. Can you guys help me with this? I'd like to keep it as inexpensive as possible ($20?) and I do want battery vs. wal wart.

Also, what do you think is going to be the best 3 foot rca's under $50? I am thinking signal cable analogue 2's because they have a low capacitance and are $50 a pair. What do you guys think?

Thanks!
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Showing 1 response by dgarretson

dgarretson
2,592 posts
 
There is debate on the LSA DIY forum regarding the significance of clean power into LDR devices. I use LDRs in a custom volume control in an AtmaSphere MP-1 preamp. If you can solder and perform basic kit assembly, for about $100 including transformer the Twisted Pear's Placid HD current-shunt regulator is a good choice. Each LDR needs under 10ma, which is adjustable as described in the regulator kit instructions.

BTW, whether used in a passive or active preamp, LDRs sound great relative to a stepped attenuator.
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