I personally think you are better off sticking with what you have. Using an outboard phono preamp is asking for more noise. You have more connections, redundant power supplies and metal. If John Curl designed your circuits you are indeed blessed.
I think Constellation and Boulder are having a competition for who can charge the most for their equipment and who can make the amp with the most CNCed aluminum. At least with Atma-Sphere you get a beautifully point to point, hand wired device so you know a large percentage of the cost is going to American labor not Japanese Robots.
I think Constellation and Boulder are having a competition for who can charge the most for their equipment and who can make the amp with the most CNCed aluminum. At least with Atma-Sphere you get a beautifully point to point, hand wired device so you know a large percentage of the cost is going to American labor not Japanese Robots.