I used to have a lot of fun playing around with stage layouts with MTL1X subs about a decade ago. Different delays for each cabinet, occasionally swapping phases and directions of cabinet placement. Whatever we could do to keep the sound moving forward away from the performance without feedback pockets on stage. With 8 cabs per side, every day was a science experiment. It's crazy the technology that has come along to do the stupid human tricks for us lol.
One thing to consider is that every time you use a crossover or HPF or LPF, the filter flips the a subsequent frequency out of phase, and can greatly affect impulse response. Very good ideas though, I would like to see some in practice.
I had no idea about any of this and stumbled onto your video. that is so cool period I'm soaking up everything I can right now on cardioid subwoofers. thanks Devin
That one design was just a 6th order parallel-tuned bandpass. Interesting. I've been mulling over an interesting design in my head that, thanks to this video, I now think would have some degree of cardioid effect. It's basically two TQWT speakers slammed together with isobaric drivers. One tube would be tuned to the bottom of the desired range with the other tube tuned to the top. The differing lengths of the tubes would create some natural delay between the signals and the ports could be arranged to help accent whatever change in the acoustic center was caused by the different efficiencies of the two tubes.
Great video. Very informing. You may want to consider using the term "polarity" rather than "phase" when referring to reversing the leads on a driver. Phase is a time related term, where polarity as you show in the video is absolute. Thanks for posting.
Alpha Sound amazing thank you soo much for this. And one more question!!! If I have an enclosed woofer box with one port facing forward and one port facing back tuned at different frequencies, Is that just bad engineering and bad design?? Thanks again
and here i thought phase was the one canceling the base lols,. I separated my subs in any random distance and have non cancellations on base so i don't get this theory of yours. The only thing that canceling my base is when i put the speaker in a box that have them flat horizontal coil facing up rather than facing forward. Have you seen the inside of QSC KS212c?
Two major aspects are never addressed by manufacturers: the clarity and intelligibility of high power bass. The quality of the result is ensured by separate transducers for the bass drum and the bass guitar, possibly for the low frequencies of the keyboards. No matter how good the research, this fundamental aspect is overlooked, while it makes all the difference between a clean sound and a crap sound.
