AVS Forum Special Member
Join Date: Feb 2009
Location: Southern Sweden
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Was to go to the Opera today, but the town is flooded, myself I had at the deepest a foot of water on the outside of my garden wall, so we didn't go.
So I've measured and trimmed the infra-filter today.
RT60 (caveat, I know room is to small for the normal definition of it) is just a fraction below 200ms - and that's a full 60dBdecay, not extrapolated.
Background noice is 30dB(A)/40dB(C) and it does not change when proj is turned on even if I can hear it in a dead quite room. If looked at brokenup into a few frequency ranges, it's mostly high but below hearing threshold, over the threshold the different ranges stay around 21-24dB (weighting unknown).
I'm happy with the results, but I understand if other have stricted demands.
I don't have an app for getting RT60 at different frequencies, I would have liked to see that myself.
Have played some music loud too, played Jamie Woon "Night Air" at REF+3 ( no typo) and it was quite nice. Db-meeter said the average (at about ten feets distance) was 108dB and it signalled overload in the peaks as it can only handle 120dB. Music still perfectly clean and enjoyable. Bass amp got a bit hotter with the infra lift (all the way down to DC) active, the subwoofers make about a 3.7ohm load.
Soundproofing is working, at these levels it's definitely the external door that is the main issue, so making an 'airlock' there with a 35-40dB rated inner door will probably be all I ever need. *knock on wood*
Next job will probably be to solder some bananas onto real cable instead of what the rack currently is connected with...