Due to the fact that the larger inductor in both of mine were snapped off the XO, I never listened to mine stock and went straight to modding it to the zaph v1 XO. Wish I had my room measuring setup with me to see how the response looks, but so far it sounds good. Factoring the price, it sounds amazingly good
Fedex also nearly failed at delivering them three times in row for me; it was a direct signature required and I was busy at work the first two times. Luckily enough their third attempt was on a Saturday.