Yes I have, but not apples to apples as so many changes have taken place with my system since then. My dad has a MEN220 and I did briefly hook it up in my system (along with his C46 preamp) after he first received it. It did make a positive improvement, but for me it was not enough to make me want to spring the $$ for one of my own, and I was focused on other priorities/improvements for my system. Also, the amount of room correction was only around 11% if memory serves. Since then I have added ceiling panels, so the correction % might even be less. The MEN makes a bigger difference in my dad's system that has ZERO room treatments. Now, if I had a MX151 to demo in my system, I might change my opinion, however I have opted for the higher performance 2 channel preamp with HT bypass route instead, and am happy with my decision.
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McIntosh MC501s, XRT29s, XR27, WS350s
ModWright LS 300 Preamplifier
Denon AVR-A100 HT Receiver
JL Audio F113 subs with CR-1 Crossover
Schiit Audio Yggdrasil DAC (Analog 2 + Unison USB)
Sonore Ultrarendu with Uptone Audio LPS-1.2
Uptone Audio EtherREGEN network switch with LPS-1.2
Oppo UDP-205 with ModWright Signature Truth Tube Modifications
Clearaudio Performance SE TT with Hana ML MC cartridge
ModWright PH 9.0x Phono Stage
ASC & RealTraps Panels; APS PurePower 2000; Daedalus Audio DiDs
LAT International, Shunyata, Wireworld, WyWires Cables
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