Hi Tom,
My Avalon Eidolon Diamond was arrived and replaced Avalon Avatar. Now the Martin Logan Depth sub-woofer is not used any more. There is enough bass and it is very high quality bass with pitch, texture, clean and control bass, no any boated or boomy bass. What you get more from Avalon Avatar is that music has much more weight and body. It is like music band is playing in your room, you listen to music band, not hifi reproduction system. The dynamics is effortless, no any compression or stress sound. The music can play loud with very clear instruments, no blur, no congest. I use MIT Oracle IC and MIT Oracle speaker wire. There is palpable singer and superb holographic image of all instruments. The Avalon Eidolon Diamond is very accurate and neutral speakers. It will show any fault in previous system chain, if there is. And it is very sensitive of speakers location placing in room and toe in set up of speakers. If anything wrong, its sound will be just ordinary speakers. If toe in is not enough, no focus image and no soul sound or you will feel not involve in music, lifeless music. But if you set up correct, its sound will be superb excellent sound which you cannot imagine that it reach to this excellent level. I am very happy and plan to add Stealth Audio Indra IC to my system to further improve my hifi system. The Stealth Audio Indra IC is most neutral, accurate, fast and ultra-detail sound IC. I hope that it will lift up my system to next level again!