Hey mac48025,
For my personal taste both in music, mainly acoustic jazz, and volume levels, mainly based on the size of the instruments/singer, along with dynamics about 95% of the time I'm fine without the ZOTL-40 amp. For a matter of fact I'm going to start experimenting with the Micro-ZOTL driving SET 2A3 or 300B based amps in the next couple of weeks. This should be very interesting, can I get the overall power/pop of the Micro-ZOTL and all the meat on the bones and color of either of these tubes? Going from the 1 watt of the Micro-ZOTL as an amp to either 4 or 8 watts for the SET amps could be a match made in heaven! The combo of LTA is still world class, these other combinations will give different tastes and this experimenting is possible because the DI's are such an easy load to drive.