@tubelectron: Those are lookin' real nice. What drivers will you be using?
Also, what is your reasoning behind packing the entire cabinet with damping material? I've read that can compromise the bass and make the speaker sound like terrible.
The drivers I am using on my speaker build are the Morel CAW 639 and the ScanSpeak D2608/9130. I have the Morels, but I'm looking for a better price on the ScanSpeaks.
Thanks
@High_Noon !
About the damping material, I rather go for a
full filling, or quasily - I mean : not to choke/stifle the speakers, right ?
Beside having done conclusive comparative tests at different rate of filling and different materials (time consuming !), I follow the suggestions from Vance Dickason "Loudspeaker Cookbook", Martin Colloms "High Performance Loudspeakers" and Joseph d'Appolito "Testing Loudspeakers" :
- Any proportion in the relative dimensions to spread the resonances of a cabinet becomes fully secondary compared to the efficiency provided by a filling with adequate material. (V. Dickason)
- With a correctly designed cabined, the best neutrality will be achieved with a full filling of adequate material density, no matter Bass-Reflex or Sealed is the enclosure, without choking the speakers, of course. (M. Colloms)
- The full filling of an enclosure with a suitable damping material can theorically increase up to +41% the acoustic volume of the cabinet by modifying the compliance of the enclosed air. In practice, increases of acoustic volume of 15 to 20%, even 30% on low loss enclosures are easily obtained. (J. D'Appolito)
That said, in some cases, favoring or pushing some low-midrange or midrange tones can be interesting if the bass-midrange speaker is rather moderate in this band, in a 2-way enclosure : as usual, it's a case-by-case basis...
La carte n'est pas le terrain !
Oh, the speakers that I plan to use for this project (I already have them in stock) are less ambitious than yours : Monacor DT-280 Tweeter, Monacor SPH-170 Woofer :

I should expect 45Hz-22KHz and 90dB/W/m, if I rely on my simulations...
T