Hey, I love the idea of two subs. Sealed box only. I’m not really worried about how low they go but more on where they will be in the room. I’m thinking 2 REL T9i because they are small but use the Speakon connections ( wired into your amps dmspeaker output. If your amps a class D do not connect the black wire to the speaker terminal. Attach it to a screw on the chassis instead. I see you have a 65” piece of glass in the middle. Just so you know the REL subs have a LFE input for home theater too. Dali speakers are usually not that heavy. So on the days you really want to enjoy the musi pull your speakers out into the room. You will be amazed at the sound. Last but definitely not least you need to treat the room. It will probably be the biggest sound impact for your money. Even free standing absorbers or diffusers at the first reflection points will really deepen the sound stage. I hope this helps.
Does an upgrade make sense?
I may be coming down with the upgrade bug, and I’m open to suggestions. I’m quite happy with what I have—excellent imaging, musicality, dynamics. Maybe I could use a little more depth (left right is fine and speakers truly disappear), and maybe a touch more dynamics.
Almost everything I listen to is Qobuz streaming or hi res and flac files from a NAS (hard drive). My system:
Cambridge 851 Streamer/DAC
Bel Canto Pre5
Bel Canto Ref 500 monoblocks
Dali Mentor 6 floorstanders
Everything sits on maple plinths, Gaia iiis, or pucks.
Cabling is mid range Morrows. I previously had Kimber KS1116s but sold them as the Morrows sounded just as good, on the current set up.
What do I need to get more of everything? Speakers? DAC, Streamer? Amp?