Rinpoche, the 200iq and the 170 (which incorporates "iq" functionality but omits those letters from the model name) are linked to on
this page.
Ricred, thank you. In this case I don’t see any technical issues that would arise in using the Aeris DAC directly into a VAC or Rowland power amp, or into most other power amps for that matter. However both Ricred and a member who reviewed the Aeris in
this thread that I referenced in one of my earlier posts have stated that they found adding a preamp to be sonically beneficial.
In the recent past there have also been lengthy discussions of this question pertaining to DACs in general, in situations where the DAC provides a volume control. See
this thread, for example. My perception has been that the prevailing (although certainly not unanimous) consensus has been that inserting a high quality preamp into the chain is likely to be sonically beneficial in most cases.
FWIW, my own instinct would be to follow Knghifi’s recommendation and go with one of the new "iq" power amp models, initially without a preamp, ***PROVIDED*** that confidence can be established (preferably by audition) with respect to the issues I raised regarding the sonic synergy or lack thereof between a VAC tube amp and your Sabrina speakers. (And btw, the inclusion of a 1 to 2 ohm output tap on these models, that is not provided on the Sigma integrated, could very conceivably be beneficial in that regard). At a time of your choosing, now or in the future, you could then assess whether the addition of a preamp would be worth its cost to you. Perhaps by buying one used and then selling it if it did not provide a worthwhile benefit.
Finally, I’ll second the comment Charles provided earlier to the effect that VAC equipment is designed in an extremely robust manner, and can be expected to be very reliable. And their support and customer service is second to none.
Best regards,
-- Al
