I'm posting this question on behalf of a friend who records acoustic guitar and vocals. Any responses are appreciated: Hi Greg, If you still post on any gear forum, could you post a question asking about the possible difference between these two preamps. I will be recording acoustic guitar with an AKG 414 TL- II. The Phoenix DRS-1 says it is transformerless. ($1250) http://www.mercenaryaudio.com/phaudr.html There are some claims to a faster response. My second choice is the new ADK AP-1 (around $850) http://www.fullcompass.com/Products/pages/SKU--73963 Could you ask if the primary use is for home-recording an acoustic and the rare use of recording a vocal, and my desire is for transparency, which might be the best choice?