I'm very happy with my LAP 150 Mkll, no problems, it hasn't been "hard" on tubes and with tube rolling you can tweak the sound. My previous preamps were an Aesthetix Calypso and a Conrad Johnson Act2.
The 150 Mk l. The Signature Edition I've been told, by two owners that had their 150 Mk ll's upgraded to the Signature Edition, that it is an improvement in all respects. I like the way my system sounds currently and haven't wanted to play around with the sound by "upgrading".
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