Don't know if this will be useful or not to you but here goes...I used this tube preamp with a Pass X250 amp & it was a great match although the gain match (volume) wasn't perfect. I couldn't run the pre past 9-10am on the dial. I sent the unit to Cary for the "gain Mod" reduction ($125) because the gain was a bit much with the X250. Looking back I should have just used the 6CG7 tubes which reduces the gain without the mod. The mod was too much gain reduction for the X250. I used EH 6922's the whole time.
