My New Magnepan 1.7i's sound dull and lifeless on the top end...why?


First time Magnepan owner - 5  days old 100+ burn-in hours on them
Associated Equipment:
-Denafrips Terminator Plus
-Holo Audio May KTE version
-Pass Labs X22 Pre-amp
-PrimaLuna EVO 400 Pre-amp
-Pass Labs XA100.8 Monos
-PrimaLuna EVO 400 Monos
-AntiCables interconnects and speaker cables
-Stock tweeter attenuator jumper replaced with AntiCables level 5 spade jumpers on the 1.7i's

My spectrum analyzer indicates both speakers highs are falling off beginning at 1.25K and are 9db down from 2.5K on
Been playing around with speaker placement and room treatments for 2 days now without any remediation. What am I missing? Suggestions appreciated.
128x128nayls02

Showing 1 response by homer_skins

Sounds strange. I bought my pair of 1.7i's about 2 years ago with never have seen or listened to a Magnepan in my life. I figured for that low dough it was worth taking a chance. Hooked them up to my Primaluna Dialogue Premium HP Integrated amp with KT-150'S and was blown away by the sound! Plenty of highs and mids. I also use AntiCable speaker wire and the stock jumpers. I run two subs from the single out on the Primaluna. Blows away the Vandersteen 3A Signatures that I replaced. Dana