Hé Merry Christmass all,
Larss, i really hop that B&G will change you your driver if you send it to them and will give you the money back of the expedition and a new driver. No sense to add or do marketing without quality management, no ?
If not, you can transform you rd75 in ski and make beautifull photographs of the first ski hifi system in a land of snow ! Monopole from the ground to the ears
(infinite glissant bafle step !)
I believe i always seen the XO one the genesis 1.2 somewhere in a internet add... on the genesis site or elsewhere, but don't remember where.
Larss, i really hop that B&G will change you your driver if you send it to them and will give you the money back of the expedition and a new driver. No sense to add or do marketing without quality management, no ?
If not, you can transform you rd75 in ski and make beautifull photographs of the first ski hifi system in a land of snow ! Monopole from the ground to the ears
(infinite glissant bafle step !)I believe i always seen the XO one the genesis 1.2 somewhere in a internet add... on the genesis site or elsewhere, but don't remember where.
Genesis 2.5 nearly similar to the 1.2 for the XO ? 4,2 k hz ? Genesis II.5 loudspeaker system Page 2 | Stereophile.com
I have no idea of what the Genesis 1.2 XO frequency might be, but I hope somewhere around 3-4 kHz, or no higher.
It's an interesting system which I have never heard, but I assume that is sadly not suitable for near-field listening because of all the tweeters and their interference pattern, and the very wide baffle will require a long listening distance for the RD-75.
I've worked a lot on different baffle shapes and widths for the RD-75, and have found that there are really only two ways to do it - no baffle like I did myself, or a very wide baffle like the Genesis 1.2. Something in between will not work well. The bass is also monopole, while the midrange is dipole, which will create integration problems between the wide baffle and the woofer towers.
Oh, and here's the 1.2
An externally hosted image should be here but it was not working when we last tested it.
Good guess:
Hong Kong Genesis Dragon Launch - Page 3
Gary L Koh said:
The problem is that you really cant find too many tweeters that are much narrower than the RD75. They all start to beam above 4-5 kHz anyway.
AMT's would not be my first choice for a super-tweeter, since they do not extend much beyond 20 kHz, and all of them have frequency-response problems in the 10-20 kHz range because of internal cancellation between the diaphragm folds.
A very narrow (10 mm or less) true ribbon would be the best choice.
AMT's would not be my first choice for a super-tweeter, since they do not extend much beyond 20 kHz, and all of them have frequency-response problems in the 10-20 kHz range because of internal cancellation between the diaphragm folds.
A very narrow (10 mm or less) true ribbon would be the best choice.
Something like a magneplanar ribbon tweeter?
DIY Bohlender Graebener ribbon Planar + Magneplanar ribbon tweeter lll - YouTube
DIY Bohlender Graebener ribbon Planar + Magneplanar ribbon tweeter lll - YouTube
What kind of FR problems AMT's have in 10-20khz range? I am looking at Aurum Cantus AST2560 right now and would like to try it in dipole waveguides like David Pellegrine did. These graphs look very good:
I don't know if that rear waveguide makes any sense...
These are not mine, but David Pellegrine measurements. There is 1/48 octave smoothing applied.
His building thread: Open Back Speaker Build
More pictures: https://plus.google.com/photos/101632266659473725850/albums/5845603116946836977?banner=pwa
His building thread: Open Back Speaker Build
More pictures: https://plus.google.com/photos/101632266659473725850/albums/5845603116946836977?banner=pwa
Thought you might be interested in this post:
http://www.diyaudio.com/forums/mult...ffle-construction-techniques.html#post3848686
Check out the woofer directivity:
http://www.diyaudio.com/forums/mult...ffle-construction-techniques.html#post3848686
Check out the woofer directivity:
Hi Larss
My vote goes for RAAL. The RAAL 140-15D would be nice, bit I would go with either Raal Dipole 140-15D of the RAAL Lazy Ribbon 9-inch Ribbon, also known as the Raal 210-10D. I think the Raal 210-10D would probably be the best option. Oh, and get the Amorphous C-core version regardless of which one you choose.
Deon
Having used both quite extensively at home and in studio, my vote goes for Raal as well.
Greg
RAAL if you just need your tweeter to start from 3kHz and upwards. TPL150 if you lack clarity in your midrange at around 1.8-3kHz and need this from your tweeter.
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