Acoustic Zen Adiago vs. ATC SCM40

I have ATC SCM11s. Like the 40s, they are a sealed box design. They are incredibly detailed. They deliver the music with razor sharp precision. Clarity is among the very best at any price. You will hear details with the ATCs that are fuzzy or inaudible with other speakers. However, with that said they can be fatigueing in the wrong setup. Also, the bass is super accurate, but has limited slam. It's as clean as bass can get and will work great in your smallish room, but it's a tight reserved bass. If you like a warm fat sound, look elsewhere. If you value neutrality, micro detail, and midrange clarity, the ATCs are unbeatable.

I use to own the Spendor A6. Fantastic speaker. Outstanding resolution and lifelike accuracy. Acoustic instruments are dead on. I personally need more bass than than produce. The bass never satisfied me unless I cranked them up louder than my typical moderate levels. A very good speaker, but bass was an issue. Midrange was faultless and superb. Highs are extended and detailed without any harshness. They will work great in a small room and are largely unaffected by room boundaries.