Originally Posted by climber07
Whether you can see the front side of the driver or the back, there is no "port" or "slot" that is tuned to a specific frequency. Bass reflex ports boost the output around the enclosure's port tune freq. This sub has no hole from which the signal exits the enclosure in phase with the driver wave, hence sealed.
As far as I know, the slots(manifold) are "tuned" so to speak as the size of the slot will affect the frequency response, output, and peaks. They cannot be just a random size and have to be designed to a specific height, depth and width or it will have resonances(peaks in the frequency response) that will not sound good. From the little, I know about slot loaded subs like the S7201 the slot usually increase efficiency in the upper end.
I would imagine they modeled the enclosure and slots in software first and then built them and fine tuned and made changes if the models/simulations didn't match the real world results they were looking for. Maybe Tom will expand on it more and correct me if I am wrong.
For more info for anyone interested in the more technical details http://www.diyaudio.com/forums/subwo...nclosures.html
It is a lot more involved than a simple sealed enclosure to design and build.
HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520
PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune
iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
Last edited by bscool; 09-01-2017 at 06:21 PM.