Hi corelli,
I totally agree with lancelock that the Linear Tube Audio's combo really gets you the magic, a lot more then just using the ZOTL-40 by its self (It has a passive volume control). I believe that you get more of the magic by using the Micro-ZOTL preamp with a very good amplifier, either SS or tube, it gets you most of the beauty you want in your system, the combo takes you all the way there.
I totally agree with lancelock that the Linear Tube Audio's combo really gets you the magic, a lot more then just using the ZOTL-40 by its self (It has a passive volume control). I believe that you get more of the magic by using the Micro-ZOTL preamp with a very good amplifier, either SS or tube, it gets you most of the beauty you want in your system, the combo takes you all the way there.