Definitely so. A useful trick, but typically in a BR one only wants to line the box*.
Here, with his available volume, sealed or aperiodic and a lot of damping involved i think.
dave
Just checked the tracking info and they are due today.
I'll make a test enclosure and if they're no good for me i will have to sell them on.
I'll make a test enclosure and if they're no good for me i will have to sell them on.
I am not sure where the (wrong?) figures (Qtc=1.3) of post #60 came from, still 45-50 litres sealed or vented for TIW250XS appears well. I would remeasure TSP od the woofer unit to compare with factory ones, then proceed with cutting timber. Satori MR13P-4 can live happily in a 2 litres sealed box, Qtc being about 0.63 and Fc =130 Hz.
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From here (my sim based on factory specs (AFAIC the best ons to start with):
50 litres to account for some damping.
Few of have T/S measuring kit that pulls numbers off the T/S curves that are as useful as the factory ones.
dave
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Dave there is something way out with your simulation. A quick check for a 50 litre box gave a 50 Hz resonance with a Q of 0.5 which agrees with the published result on the Visaton web page.
Think outside the box for a change. Why is there so much emphasis on manipulating a small region of a woofer's response around resonance with the cabinet design only to find it all goes to pot in a room anyway?
unless people are living in unusually large rooms driver resonance and room modes are almost a decade apart,no?
Indeed there is. If you look at the parametres it says 661 litres. That is what the 66l on the spec sheet looks like when you are going too quickly. Corrected to 66 litres 50 litres does get near 0.5 Q.
With the correction, you could use even less volume (but this is a nice Q if you have stiff walls). On 1st look the largest miniOnken alignment i would put them in would be about 32 litre.
dave
I’ve about to build a few 3 way speakers with .75”mdf and .5” plywood inside layer with the brace as plywood also. The front baffle will be .75”mdf outside layer with .75” inside layer. I just wanted to use mdf on the outside because it’s easier to shape. The brace will be a diagonal brace enclosing the midrange and tweeter it their own cabinet separated from the woofer.