Which 15" - 35/40 to 400/500 Hz ?

[ScottG]

I find this paper somewhat confused (not confusing, just confused). There is a quote


"The only woofer design that is capable of being made time-accurate is the sealed enclosure"

It's a pretty bad article, though likely excellent for the Register.

-of course a sealed enclosure design goes through phase rotation/time delay, irrespective of the crossover to the next upper pass-band driver.

You can "correct it", but that's more in the realm of DSP.

An aperiodic design actually helps somewhat, and though I tend to think of it as a "sealed enclosure" despite the gaping hole, it isn't a sealed enclosure. So even technically the statement above is wrong.

 

[jtgofish]

Hello Evryone,

From my window a closed box is easyer to build, and no need to adjust the event and the internal damping.
And with my minidsp I can use linkwitz tranformation 🙂
Thank you for the list of speakers drivers, but a little bit pricely ...

Any opinion about thoses :

For 100 - 500
-------------------------------
monacor SPA-112PA :
MONACOR - Products - SPA-112PA

Monacor SP-30/200PA
MONACOR - Products - SP-30/200PA

Monacor SP-30-200 Neo
MONACOR - Products - SP-30/200NEO

For the subs < 100 Hz
----------------------------------------
Dayton RSS390HO or DVC385-88
Dayton UM15-22 Ultimax


Yes 2mm is not a lot of extension but but for most domestic environments given their high sensitivity it is probably enough.
In my experience the best quality of bass comes from large drivers that hardly move and the worst from small drivers pumping like pistons.
For use in sealed box a Qts of above 0.5 is optimal.You might get away with 0.45 ish with room gain .
There are very few drivers like that other than those with small magnets/weak motors.
Another option would be to use two 10 inch woofers.The MCM Select 55-2981 stands out as an ideal driver for sealed box , [or open baffle] medium to high sensitivity, and is really cheap but build quality with cast frames and decent sized magnets looks OK.











Thank you in advance !