Hypnotoad
Active Member
Hey, half the drivers were using power to cancel the output of the other drivers using the same power source!
Must have been it, they would go really loud with very little distortion.
Hey, half the drivers were using power to cancel the output of the other drivers using the same power source!
Did the out of phase (or whatever it was) cancellation drivers run on a one to one power ratio with the main drivers? Interesting. I can appreciate one the idea in favor of the speaker--an attempt to eliminate the 'box' from the box speaker. That is a good thing as an ideal. I just have reservations about it in practice. In any case, I'm not their customer.Hey, half the drivers were using power to cancel the output of the other drivers using the same power source!
I do not know but cancellation is the basis of the operation.Did the out of phase (or whatever it was) cancellation drivers run on a one to one power ratio with the main drivers? I
If you have a large listening area and don't mind the feng shui, and if SDA is your sonic ticket, then I guess. But in fairness all speakers impose a certain listener and placement compromise. I wonder how the Polk's off axis SDA experience is?https://www.soundandvision.com/content/polk-audio-legend-l800-loudspeaker-review
S&V has the first review, I highlighted the part I thought was interesting.
Setup of the L800 towers didn't follow nearly the same template I'm used to when positioning speakers
Hey Don, have you had the chance to hear the M2's or the 4367's yet? I am still in love with my 4367's, will make the trip to NYC to hear the M2's soon hopefully. Also have you heard the LRS yet, blew me away at the last AXPONA. With it's stellar imaging and revealing clarity, right up there with the Quad 57's I heard at the show too.
Hey Don, have you had the chance to hear the M2's or the 4367's yet?
I was sort of under the impression that the old Polk SDA thing (remember Matt Polk in a labcoat?) was sort of similar to what Bob Carver was doing electronically with his 'Sonic Holography'.
I was sort of under the impression that the old Polk SDA thing (remember Matt Polk in a labcoat?) was sort of similar to what Bob Carver was doing electronically with his 'Sonic Holography'.
I believe that Carver's patent is given a credit on the back of the speaker or in the manual. There's a back story which should come from Polk.They were supposed to work on the same principal. I have an outboard sonic hologram generator sitting on a shelf if anyone wants to try and measure what it does.
i think the principle behind the design is that each speaker plays its own channel from 1 set of drivers and the second set of drivers play the out of phase version of the other speaker. the distance between the 2 vertical sets of drivers is about even with the distance of your ears. and its supposed to give you a more accurate representation of the sound stage my only allowing the original channel into each ear and preventing the other channel from influencing the opposite ear.I do not know but cancellation is the basis of the operation.
The Polk forum still has a section on these speakers.
https://forum.polkaudio.com/categories/vintage-speakers
Did the out of phase (or whatever it was) cancellation drivers run on a one to one power ratio with the main drivers?