5 responses Add your response
I'm not familiar with Chartres. The Acoustic Revive review I found has a picture of the inside with a board that looks identical to the cheap China ones I bought for $10-12. The power supplies are so cheap they would seem a good candidate for power supply upgrades if one were interested in seeing how far they can go.
I bought this unit new on ebay in January 2020, for $199.
I corresponded with David and the product and
his communications are first rate. You may reach out to him:
jerich_hu5759sjza at members dot ebay dot com
If he is the seller I am confident he will address
(Isolation from vibration is paramount.)