The Endgame: PureBliss Multiway Loudspeaker System

[grindstone]

Those are good comments. So the only thing left is the Mrs. Kumar test results...my guess is that those are good as well based on your previous reports. Been really fun watching someone find their thing. THanks for posting and bravo on the dedication and commitment to just push and follow your own drummer. Best is that you took it all the way back-around to happy and fun again. Maybe 4 loops!!

 

[Vineethkumar01]

Thanks a lot @grindstone for the continuous encouragement throughout this journey.. It has been about 4 years since I started experimenting with speakers for my personal use at home. In each concept speaker, I found something or the other not to my tastes. Usually this came up in about 2 weeks of listening to the system.

But the current system is a special one.. I have zero complaints (yet) regarding absolute sound quality with daily 1hr listening sessions in the last 3-4 weeks or so. The looks of the whole system is a bit controversial as of now (and as per Mrs Kumar ). Maybe I will build a new better looking cabinet for the 4 drivers per side (2 woofers, 1 mid, 1 tweeter), keeping in mind whatever i have learnt so far..

I don't know what makes this system sound so much better than others i have heard yet. Maybe it is the purifi driver, may be it is the Bliesma tweeter. Maybe it is all of those drivers coming together without each section calling attention to itself in my listening space (the most important part of the whole setup). Every day, I try to find out some fault. But haven't found any yet (except for the slight buzz in the 3d printed boxes at really loud volumes and the cabinet vibration caused while playing very deep bass by the not so properly braced Satori woofer cabs).

It is like what hifi compass says. I forget that i was there to find out the faults and those 5min listening sessions easily extends to an hour..

 

[grindstone]

Ooooh that's the perfect indictment -- congrats, man! Shut it off, never listen again and run!!! Just messing... It makes a lot of sense. Great drivers (ouch$$$).

Re WAF, if they every go back by walls again, you can DIY some screens. These are hiding Klipsch Jubilees. You could do the same concept maybe with just a big frame if she might like it better (esp if she helps pick-out the fabric). I say put one on Sadik's list if he'll entertain the idea.

You know what you have to do, don't ya? Ya gotta close this loop. Find that song with this ethereal woman that I'd follow off the end of the earth singing like that on the foam (and tell me what it is!)

 

[Vineethkumar01]

Thanks @grindstone
I will keep in mind that DIY screen idea.
I got curious after you mentioned this song. I hadn't heard it on this system.
So I played it and tried to record it (mostly pointless exercise since now the room is excited even more by the overall very wide radiating system and on top of that all the very late reflections captured on the phone adding together and creating a mush/enhancing the overall brightness of the recording this case)

In real-life listening, because the ear may filter out a lot of nonsense, it is fun to hear this song on the system and it sounds balanced overall.
Anyway, here it is:

The original song

and some translations (Hindi is not my native language, so can't vouch for accuracy ):

Ae Ajnabi (Dil Se) – Lyrics English Meaning/Translation

caption id= align=alignright width=210 Cover of Dil Se../captionWhen Gulzar won the Oscar for Jai Ho (Slumdog Millionaire) he was asked in an interview what he considered his finest work was

blog.chandrahasa.com

 

[grindstone]

Wow -- that was fast! THANK YOU! And I think that, esp for all of us aware of the limitations, the YT recordings have value. Thank you again for taking the time to do all that and congrats on your achievement. I'll say it again, you have moved as far as anybody I've ever seen move that fast in DIY in now pushing 50 years of it myself. Yes, your choices are different -- all of ours are -- that's why this is all big fun! I hope that your face hurts from smiling when you and Mrs. K are listening (and that she finds it all worthwhile to support you in your own avocation).

Edit: Once used surplus store fabric when needing to grandkid-proof a speaker (it was strong-enough). Cost something like 2-5dB from 2k on up, FWIW. That's when I learned to use 18 TPI linen if it's not too sheer in appearance for your application. The linen, if not available in the right color, can be dyed and might become another "group" exercise so there is mutual investment in it staying. It's not bullet-proof enough for a young kid, but you don't need a new filter, either. FWIW.

 

[prem]

It’s sounding very nice Vineethkumar01. Appears to be a reasonably well balanced sound. Timing is spot on. Details and separation is very good. Probably lacking a bit in harmonics but that could be the recording too.

 

[Vineethkumar01]

Thanks @prem for your comments.
In-person, the system sounds very nice.
I recorded this and all other videos I have been posting using my mobile phone, which seems to have a bad response above 3-4kHz and especially seems to have a lumpy response in the sibilance region. Hence, whatever harmonic structure is there in the music is crushed, making it sound sort of compressed.
On top of that, all those delayed reflections and flutter echo adding on top of it make it sound bad and echoey (to me).
In my MLP 2m away from the speakers, my estimation is that I perceive more of a mix of the listening window response below 3-4kHz and power response curve above 3-4kHz as seen in my MLP measurement below.



Part of the reason that probably also contributes negatively to preserving the harmonic structure is the diffraction effects of the very wide radiating tweeter.


To get rid of all those variations above 2kHz and make it butter smooth is what a waveguide for this tweeter is for, which I am in the process of integrating..

The waveguided tweeter response looks like this (still very wide radiating but controlled radiation)..


Now that is one of the things I eagerly look forward to in the coming months.

 

[keroo1099]

@Vineethkumar01. The system should sound good anywhere in the room with such a wide and even dispersion pattern. Superb directivity

 

[oldmonk]

It’s sounding very nice Vineethkumar01. Appears to be a reasonably well balanced sound. Timing is spot on. Details and separation is very good. Probably lacking a bit in harmonics but that could be the recording too.

very nice precise feedback

+1

 

[diyaudio]

Impressive directivity. Vineeth

 

[Kannan]

@Vineethkumar01 Not much can be deciphered on a phone recording, especialy stage, imaging etc. However, voicing, which is hallmark of a good crossover alignment in a multiway is spot on. Been egging to come and enjoy your setup with another likeminded friend as we bith have fetish for active setups. Will ping you over WhatsApp for a suitable date to travel down from Chennai, to return the same day.