Dual Membrane planar magnetic speaker - Part 7 Damping and a tune 

High mass , a strong spring and low acoustic loading leads to a high Q. The easiest variable to change would be the panel tension. Look at narrowing the foil traces to lower the mass if. I guess you just look at the power handling of the coil to see if a narrow trace will still handle the power. Another great video. I'm working on a phono preamp today, but I'm way too disorganized to make a video. You're amazing.

Sounds beautuful! The difference when you leaned forward was huge; the bass dropped considerably, but the soundstage became way more enveloping. I do not have a place to listen to this kind of loudspeaker, but I’m very impressed by what you’re doing!

Sounds well balanced and transparent. Like your song too for testing! This panel is more bang for the buck than a panel that is 3 times the cost.

Hi Joppe! I was waiting for your new video! :) These are sounding beautifully! ;) I've made some push-pull magnetostatic speakers, this design is the most ideal I think, but I know very well, that the construction has to be very strong... I was thinking on a solution about the linear/symmetric magnetic field, and you mentioned that you don't wanna use twice the amount of magnets! If you remove the north pole magnets from a single sided magnet circuit behind the membrane, and place these in front of the membrane facing north pole, between the south pole magnets you will have a north pole, on the other side of the membrane! The direction of the flux not will be perfectly sideways, but it is true at the single sided magnetic circuit too! But, the flux will be symmetric in +- direction! Maybe a wooden frame for the magnets is enough, at this design, the front and the back magnets will attracting each other a bit, and not repelling strongly, as the "normal" push-pull design! Maybe a FEMM-simulation can tell, if perforated steel or the wooden frame is the better in this case (the steel can "steal" from the useful magnetic flux)! ;)

always great content, also the song is really good

Leuk te zien hoe je je ervaringen en tests deelt. Dit lijkt me wel goede muziek om de luidsprekers te testen. Ik hou zelf erg van slechts een beperkt aantal instrumenten waarbij niet heel veel is geknutseld aan de opname. Ik blijf het altijd verwonderlijk vinden dat we als mensen in staat zijn een reproductie te maken waarbij de werkelijkheid wordt benaderd. Ik zag laatst een interview met de uitvinder van de magnepans die zijn eigen luidsprekers wel aardig vond, maar nog lang niet de werkelijkheid konden benaderen volgens hem. Hij maakte dan wel de vergelijking met een groot live orkest. Ik ben wel benieuwd wat het witte apparaat is boven op al de apparatuur.

This is nice, but I still think you should try a large surface area dipole bass with normal drivers as a bottom end. H-frame or M-frame alternatives with two drivers per side (one back-side and one front-side facing towards you) are both very capable and easy solutions... 10- or 12-inch woofers of good quality aren't that expensive if you go with brands like SB Audience or GRS. For larger panels (I've had both planars and RD-75's) that solution is what I ended up with after experimenting with thousands of euros and hundreds of hours of playing around with all kinds of both very "standard" and very strange and experimental solutions. Two push-pull configured parallel dipole frame pro drivers per side next to the tall Bohlender-Graebener's.

Would like to hear it in person..Sounds very promising. I live near the Afsluitidijk;-)

I do not really care what classical subwoofer would outperform planar panels. I care about transparency and speed.For high volume i have headphones. (also planars :D )

I really liked the music, do you have a link to the original recording? I have been using cling film to enhance the midrange and hf on my ply dml panels. This usually covers about 6inches or so of the exciter area, and used as a passive radiator . You have made me think, maybe I should try to cover the whole panel area at the front or mabe at the back and see what happens. It will probably just vibrate out of control when the volume is turned up. There are old patents of large flexible panels being driven by cone drivers using air pressure. Your panels are Always a joy to listen to , thanks. Steve.

Have you tried extending the baffle backwards to help separate the front and rear wave? Move the baffle step to the resonate frequency?

When one membrane is further from the magnet the nonlinear effects from the material are stronger but since the air couples it to the other membrane that's near the magnet that lowers distortion, was that correct? I probably got it wrong

is your tweeter similar to bayz audio

It is damp because there is water It is damped because it is less resonant. Sorry, I can't be helped. I've been a youtube commenter for too long and pedantism embeded itself in my DNA