I'm pusing 100 watts now, and sometimes it runs low on steam.
Louisl (System | Threads | Answers)
Pushing 100 watts into an 89dB speaker is running out of steam when you state you listen at 90dB - 93dB?
Something doesn't add up here.
Perhaps the problem is that your tube amp's impedance curve doesn't match the impedance curve of your speakers (which dip down to 3 ohms...I've owned them), and therefore the bass response is anemic. This could be interpreted as running out of steam.
I know firsthand the Moscode 401HR is an excellent match with the VR4 Gen III HSE. I owned this combo for a couple of years.