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.
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
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.
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.
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.
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.
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.
Really cool presentation! I'm a little proud of myself for following the concept too🤣 thanks for putting this together!
Excellent! Very informative and just the right level of physics for someone like me with a physics minor earned 20 years ago but largely unused since.
excellent video !!!! the 99 thumbs down were people who hate bass.....
The idea for multiple woofers in pyramid style enclosure is definitely worth to try!
You have some great ideas. Nexo should hire you.
When do we get a part 2??? 😢
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
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.
John Schauer nobody uses polarity anymore. It’s phase
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.
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.
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great vid man! very informative! hope to see more videos! kudos!
Great video. Very informative. Thanks for sharing..
I think it funny to imagine the people who disliked this
cardioid or end fire system on this video?
frex wofer 35-100hz
"Cardioid" refers to its radiation pattern and "end fired" it's just one of the techniques you can apply. There's also "FrontBack" and "Acoustic Arc"
thank you all that much
Wow amazing. So cardioid speakers that are marketed without any delay are not necessarily efficient at different frequencies. Mind blown
Sound Junky that’s right. Some use “passive” cardioid methods but we’re very suspicious of those. True cardioid requires processing
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
Hard to say, do you have a drawing of the design? You might also be interested in our video on subwoofer ports...
Alpha Sound i don’t have the drawing but it’s called the soundtown Carme. Super well built but the ports in scared of. I’m getting it delivered today.
Many thanks!
How about if I fix in so many sub in shiping container .
Some points flew over my head :)
Still thanks for this video.
Well articulated. Enjoyed a lot!
very clear and informative video!
I love cancellation in the rear.
Hypothetically speaking, would an horn type of enclosure help with this?
👌🌟🌟🌟🌟🌟👍👏👏😎 Thanks for all the work
what program do you use to create your simulations? Really cool video, thanks.
Ajajajj
Very good info! Thanks!
15:10 The two opposing ports will cancel each other out, correct?
Hello . Great presentation. Audio too low. Thanks again
James mcmillon Thanks! Yeah the audio really sucked on this one, it gets better in future videos lol
if i have a subwoofer side by side and having one faced the rear with reversed polarity. is a time delayed required? great vid btw
Devin Sheets does it matter weather the sub is reflex or bandpass?
Bravo👍👍👍👍
Very well said.
What happens if you have a port in the front and a port in the back tuned at different frequencies?
It's called 6th order not really common but they work well in cars if you have the space
good stuff. Thanks.
thanks a lot
welp....that explains all of the low end I was hearing on the stage.
pingin beli..
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?
Soy el 2000✌️😎👉
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.
So, you'd like a separate set of subs for each instrument?