I expanded my comments on this related thread:
http://www.audiocircle.com/index.php?topic=138578.msg1475597#new Having lived with the Tortuga LDR1B for a year now and soon to add the forthcoming battery powered LDRxB with the added absolute phase inversion option, I continue to be extremely impressed with the power, slam, neutrality, channel separation, sound staging, depth, frequency extension (both treble and bass) from the Tortuga. Not only that, but at a fraction of the price one would expect from a preamp that delivers all of that.
Yes a nice review, but not one that does justice to this outstanding product.