I owe you an update, as there have been some changes to my setup that have significantly overhauled my initial impressions.
Driven by curiosity, I connected a different pair of speakers to the power amps: the KEF R3. I know them well and highly value them for the quality and delicacy of their high frequencies. To my surprise, I discovered two things:
1. While the highs on the R3 are excellent and subtle, they lack the resonance of the ribbon tweeters in the Monitor Audio Gold 300 6G. On the MAs, the drum cymbals ring out beautifully, as if they were right there in the room. On the KEFs, that sensation disappears. Don’t get me wrong—it’s still excellent, but the liveliness of the presentation is lower.
2. Much to my astonishment, the KEF R3 provided more bass than the MA. This puzzled me, and after a bit of digging, I discovered that both bass reflex ports on my MAs were plugged. That’s how they were set up with my previous amplifier, and I had simply forgotten about it.
I immediately reconnected the MAs to the Topping B200. Oh my God! What a difference. So much bass—almost too much. Since the MAs have two ports each, I settled on keeping the bottom one plugged while leaving the top one open.
And now for the most important part: after restoring the bass to my MAs, I switched the amplifiers back to Low Gain mode. The difference is massive. The accuracy and detail are staggering, but above all, the decay and resonance of the instruments—cymbals, acoustic guitar—it’s a completely different level of quality.
That’s why I’m correcting what I wrote earlier. I was listening on High Gain because I felt I was lacking bass. Now that the bass reflex ports are unplugged and the low end has returned, I sincerely recommend listening on Low Gain instead. For me, it’s like having a completely new amplifier. I didn’t spend a penny, yet I’m getting that "new gear" joy all over again!