I've read all the comments and would like to give my two cents.
Let me first say that I really appreciate what Amirm does for our community and the man approaches everything from a scientific standpoint.
But he also went through harman training to make it easier to recognize the resonance and in which frequency it is approximately located.But those are not spikes with high Q but increased frequencies through two or three octaves (wide Q).
I personally avoid these tests because I simply don't want to know what to look for and look for irregularities.As they say,Sometimes it's better not to know some things because that would only diminish my love for music and this hobby.
This is how I got the first iteration of these speakers and they were designed by Adrew. So I bought the speakers out of the blue just for that.
I knew he liked the gently sloping frequency curve and paid attention to the off-axis response.
Andrew himself said that the cabinet is the most expensive part of the speaker and that he focused on oversized motor structure and inch and a half voice coil so it can handle a lot of power and aramid fiber for membrane the quality of the driver and crossover.
The difference between these two are crossover point and twitter.Andrew prefer soft twitter and easy load on stereo equipment,he rated speaker as 6 Ohm but could easily be advertised as 10 or 8 Ohm load.
So Andrew use 100 Herz and 3000Herz crossover point, and this new one has crossed at 400 and 2200Herz.
The MDF are the same thickness and with minimum reinforcements are similarly placed in the box, and has same measures and weight.On the new speakers, the lower reinforcement is set too low, while on the older model it is between the two drivers and I saw that KEF sets the reinforcement next to driver, even supporting the motor structure, and they using leser interferometry so they know what they doing.
The uper reinforcement separate middle and twitter from the woofers,but is done beter with new one Because it breaks the inner waves better and strengthens the sides exactly where I feel the most vibration.
As soon as I played them for two weeks at 65spl.
Then I spent the whole evening in the dark listening to Dite Straits on around 90spl.
When I turned on the light, I saw that the wooden ashtray I had placed on the speaker had fallen.I place my hand on sides and it vibrate like sex toy right next to middle driver because he is responsible for 100 till 3000herz.
I couldn't figure out why the woofer crossover was placed so low.
Like two woofers play from 42 till 100hz. and that is it?
But know I believe that is because 350-400hz is where most voices both man and especially woman are located?
So resonance at 190 is more than real but you can't hear it no metter what I do.
The other thing that was weird that the whole tover insade has only one light white stuffing in upper section where middle and twitter are.
Back then, I thought we listened with our eyes, and the very thought of the box resonating drove me crazy.
And so I bought 5kg of green glue and took out the middle and both woffers and start applying thick coating inside and apply it thicker in some places and thinner in others so that the surface remains a little rough and it is applied so it looks like waves.
I spend whole 5 kilos so 2,5kg per tower.
The coating was thick at same place 8-10milimetar and some places 4.
Then I put that little bit of filling back up and nothing down there where the woffers are.
The resonance was gone but as soon as I star listening some familiar songs they sounded muffle.
I took frequencie sweet and the bas was lower by 2 db and whole frequency response was down by 1.5 db till 2500hz.
Basically I lower my speaker sensitivity.
I regrett imidiatly and I couldn't believe transformation from sound with all special Q and like it was live music to muffle sound and just couldn't believe so I hope someone learn from my mistake.
I really can't understand why such transformation occured and if someone has explanation I would appreciate if can share it.
Really for good embrace speaker tower you really need spend above 2500-3000 dollars like KEF R series and so on.
