Originally Posted by Ccondo1
Room is 21L x 16.5W x 9.5H
You’re just past the upper end of sealed performance in total room volume. Your longest dimension determines room gain. At 21’ that means room gain will start at 26 hz, and increase by 2-4 dB by 20hz, and exponentially on down.
The HSU subs are port tuned at ~22-25hz, likely providing more headroom at that range than the sealed subs, even with their roomgain, but the sealed subs still have quite a bit.
If you want ultrasonics, the sealed will give that where the HSU can’t, but you can get a taste for that by plugging the ports on the HSU and switching to sealed mode. You’ll also need a movie with ultrasonics. I like War of the Worlds where the alien ship comes out of the street.
From about 30hz and up the sealed subs will have more headroom but this won’t really be a factor unless you are running over reference and or loud.
All of these subs will give you tight flat bass before being over driven, the HSU included. The sealed subs will have more headroom above 30hz, but will only be realized if you were actually going over the headroom of the HSUs which is still quite a bit.
Have you thought about using REW to see exactly how you are performing?
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