Some weeks ago the CBT36s got a new owner. I set up the speakers at a friend's apartment. We used the miniDSP Flex as a DSP and 4-channel amplification with Hypex UcD modules.
Tried different placements first with measurements. The speakers generally don't change much above Schroeder and also quite little above 150 Hz because it avoids the floor bounce. But obviously the lower frequencies will vary with placement.
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Ended up having the speakers fairly close to the TV. The right speaker was moved further to the left than what the picture below shows.
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The speakers were intially set up with a flat response. After placement was found, we added some shelving to get a response falling towards the treble.
The response on each speaker with 1/12 oct. smoothing was like the following.
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I need to investigate later what's happening between 600 Hz and 1 KHz (the dip). It may be the table with all the stuff on it that's causing it. But overall, this is a very good frequency response in such a small room with no acoustical treatment. That's the result of a good speaker design that has a very uniform directivity, avoids floor reflections and minimizes ceiling reflections.
Next step now is to do some acoustical treatment. An absorber will be placed in the ceiling between the speakers and listening postion and one absorber on side wall will be added. After that, some more tuning with DSP and add some presets the owner can change between. Later, a subwoofer will be added.
Anyway, thought this could be of interest of some. While the CBT36s aren't without flaws, it's truly a remarkable speaker IMO.