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Discussion Starter · #1 ·
Hello all,

I am looking for some help on building a sub-woofer with a couple of Dynaudio 30W100 woofers I have.
The woofers have a Qtc of 0.61, Fs 24 Hz and a VAS of 269 liter according to the company specs.
I have one pair in a huge closed box speaker which has Variovents.

Now I want to build a sub-woofer which can fit in our smaller living room and has a bit higher WAF.
When I did some quick calculations I noticed a closed box was going to be huge with this speaker.
As I have one pair I thought about using them in a compound set-up, thereby nearly halving the required box volume. Which is alas still humongous....

So, I then thought about going for a high pass filtered speaker box, this will decrease the boxvolume considerably as a Qb of around 1.0 can be used.

Does anybody have experience with building a high-pass filtered subwoofer or with building a subwoffer with the Dynaudio 30W100 units?

Regards,

Hjalmar Dijkstra :hsd:
 

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Discussion Starter · #3 ·
Qm=2.7
Qe=0.805
Qtc= 0.61,
Fs=24 Hz
Vas=269 liter
Max lin p-p = 8 mm
Diameter 12"


The sub I was thinking of:
compound, total Vb = 85 liter
Vb= 0.5* Vcompound + Vback
C= 1800µF
 

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