Cressy's Banned Omniset

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Tue Oct 03, 2017 9:24 pm

Well that only lasted a week, before it started to drive me up the wall.
I tweaked the cap value down a bit, which gave a little relief, but the best outcome came when I removed all the damping from the cabinets.

Job done,
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Sun Oct 22, 2017 2:29 pm

Trialling these cheap, 3inch polyprop cone, tweeters in the Flatty Omnis, and thoroughly enjoying them.
Lovely tone squire. :mrgreen:
Image

Cone tweeter in a speaker purporting to be hi-fi? :shock:
That's it! He's completely fecking lost it now! :lol: :lol:
Last edited by SteveTheShadow on Sun Oct 22, 2017 2:55 pm, edited 1 time in total.
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Sun Oct 22, 2017 2:42 pm

It's hilarious!
The further I take this design away from all that hi-fi :Bllocks: the better and more like music it sounds
Last edited by SteveTheShadow on Sun Oct 22, 2017 2:56 pm, edited 1 time in total.
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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Dr Bunsen Honeydew
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Re: Cressy's Banned Omniset

Unread post by Dr Bunsen Honeydew » Sun Oct 22, 2017 2:56 pm

Cones are good apart from extreme extension and a tend to beam in very small drivers. A small cone and a nipple or dome combined is the best solution like the early AR / Allison, but try finding them.

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Sun Oct 22, 2017 3:06 pm

Yes, beaming was a worry before I installed them. But it doesn't seem to be much of a problem in a small room like mine. You can't get far enough off axis for it to become an issue. It's forty years since I heard a cone tweeter equipped speaker and it's a nice experience. Female vocals and massed strings are particularly good with one; not a hint of screech on either.
The hi-fi market is obviously not interested in cone tweeters, which means they are cheap as chips and fun to play with.
This one is 92dB efficient and will handle 22W rms so definitely not a party tweeter, but with an efficient pro bass/mid like mine, you'd be deaf before you got anywhere near 22W of treble power going.
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Tue Nov 07, 2017 5:21 pm

Cone and dome are now combined to produce sonic fabness:
Image

Cone is mounted on a gimbal so it can be swivelled to focus the image, without having to toe the cabs in.
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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Dr Bunsen Honeydew
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Re: Cressy's Banned Omniset

Unread post by Dr Bunsen Honeydew » Tue Nov 07, 2017 5:57 pm

That will now get KarateKid going again, between the pair of you this is ripe entertainment.

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SteveTheShadow
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Re: Cressy's Banned Omniset

Unread post by SteveTheShadow » Tue Nov 07, 2017 7:53 pm

Yes, and the thing is, the sound is great as well.
I've discovered that to get the semi omni principle right, you really do need to get that combination of forward and upward radiation correct so that you get a spacey spread AND proper imaging. There is a lot more to achieving this than you think.
But if course you know all that already Richard. :)
DIY NVA amplification ( roughly equivalent to NVA A60) BTE Designs passive preamp, BTE Designs Lenco L75 turntable, Rega R200 arm, Goldring E3 cartridge, NVA Phono 1
Musical Fidelity M1 DAC, AppleTV4 with Apple Music subscription, ripped CDs streamed via WD MyCloud Home Duo NAS, with PLEX media server.
Speakers - Large sealed cabs, with Fane 12-250-TC 12" full range drivers.

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karatestu
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Re: Cressy's Banned Omniset

Unread post by karatestu » Thu Nov 09, 2017 5:23 pm

Excellent work Steve. Your project seems to take a more measured approach to mine - I am a to hell with it, lets try it and see without any real idea of what is going to be achieved sort of guy.

"A spacey spread and proper imaging" - I seem to be achieving that with my upward firing tweeter whereas you are doing it with two forward firing tweeters. I don't think two forward firing tweets is the way for me to go - our projects are similar but different at the same time.

I am toying with the idea of adding a side firing mid just to see what it does. That will make two bass (isobaric), two mids (up and side firing) and two tweeters (front & up firing). Added to that is the fact that with the bass drivers I am getting some low level mid band because of the non existent inductor.

Sorry, this is your thread Steve. I should keep my rambling nonsense to my own thread.

Stu
Naim, Linn & Harbeth fanboy

antonio66

Re: Cressy's Banned Omniset

Unread post by antonio66 » Thu Nov 09, 2017 7:29 pm

I don`t believe Steve will mind Stu. I`m certainly no expert but side firing mids I would be unsure about. Still, will be interested in your results. :grin:

Any more news on your doubled tweeted Omni Steve?

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