So, the long awaited sub arrived yesterday, and I've immediately set it up in my living room (which I believe falls into the Sonos definition of small-medium size) and paired it with Arc and One's as Surround and so far is one of the biggest disappointments I ever had from a piece of tech.
I've played music, movies, tv shows and to my hears, I couldn't hear any differences, the sub at 0 is almost not audible, at 5 you can hear something, and bringing it at +15 finally showed some heavy bass, but I don't think that it is normal. On top of that, to me seems like the Arc and Surrounds are still playing those bass notes, instead of handing it down to the Sub and mid - high seems exactly the same as before, and I've expected it to sound better.
So I've started experimenting:
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Tried turning the sub off, made no tangible difference to my hears
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Tried moving the sub to another room, so that I couldn't hear it, and to my hears the arc was still playing low frequency sounds. Tried turning off the sub and still, no difference in the sound profile coming out of the Arc
I've also made some spectrum analysis, those are made with a free app found in the App Store, and record at 34 volume, which is a casual listening volume in my living room, playing the first 2 minutes of Angel by Massive Attack, which has a lot of bass, using a 5th generation iPad mini
Arc + Sub in the Living room
Arc in the Living Room, paired with the Sub placed in the Bedroom - recorded in the bedroom
Arc in the Living Room, paired with the Sub placed in the Bedroom - recorded in the bedroom
Arc in the living room - Sub in the bedroom - recorded in the living room
Arc with no sub paired
Sub in the bedroom paired with Symfonisk Lamp
I'm absolutely no expert and I know this is far from an accurate and scientific proof, but seems to confirm what my hears were telling me: there's almost no difference between sub on and off, and the Arc seems likes it's still playing low frequencies notes that should go to the Sub instead. What do you all think?