The Kyron Audio model Kronos is a very nice looking dipole speaker, and also get rave reviewes.
It is a three way active speaker with drivers from Scan-speak and Acoustic Elegance.
Does anyone know the XO-points? I am especially interested in the XO between the midrange and bass drivers. I would presume xo around 300 hz but both the Scan speak and AEs have quite a wide frequency area available.
I am also interested in seen measurements.
Best regards
Gisle
It is a three way active speaker with drivers from Scan-speak and Acoustic Elegance.
Does anyone know the XO-points? I am especially interested in the XO between the midrange and bass drivers. I would presume xo around 300 hz but both the Scan speak and AEs have quite a wide frequency area available.
I am also interested in seen measurements.
Best regards
Gisle
The Kronos designers stated in one article that each of the two 12" woofers has a different crossover frequency, and a different "controllable" equalization curve, and a different amplifier. The Control Unit drives six Hypex digital amplifiers which provide in excess of 1.6kW. Massive amounts of DSP, plus a setup Mic is available to tune the bass equalization to any seat in any room.
Speakers Look like:
7" Midwoofer Scan Speak 18WU/8741T00 Illuminator
Two* 12" Dipole Woofers Lambda TD12D
Two* Tweeter R2904/700009
As a dipole, the Scan Speak 18WU874T00 has 86.5db sensitivity. With no baffle, the dipole SPL starts to drop at around 280-300Hz, and is -3db at about 120Hz. The Xmax and Max_Power for the 18WU874T00 start to dipole limit to 104db SPL around 300Hz. It would seem logical that the upper 12" dipole woofer would have a crossover that covers up to 300Hz, which is easy for the Lambda TD12D to accomplish.
(one of my early dipole designs used: two Lambda TD15D + one Lambda TD10D + a 4" long AMT dipole tweeter. The Lambda speakers are excellent.)
Speakers Look like:
7" Midwoofer Scan Speak 18WU/8741T00 Illuminator
Two* 12" Dipole Woofers Lambda TD12D
Two* Tweeter R2904/700009
As a dipole, the Scan Speak 18WU874T00 has 86.5db sensitivity. With no baffle, the dipole SPL starts to drop at around 280-300Hz, and is -3db at about 120Hz. The Xmax and Max_Power for the 18WU874T00 start to dipole limit to 104db SPL around 300Hz. It would seem logical that the upper 12" dipole woofer would have a crossover that covers up to 300Hz, which is easy for the Lambda TD12D to accomplish.
(one of my early dipole designs used: two Lambda TD15D + one Lambda TD10D + a 4" long AMT dipole tweeter. The Lambda speakers are excellent.)
I support Linsource's estimates.
Jamo R909 is quite similar, but with wide bafle way up. It has a smaller diameter mid.
Jamo : Floorstanding Speakers : R909
It's predecessor R907 had xos set at 250Hz and 2500Hz
Jamo Reference R 907 loudspeaker Specifications | Stereophile.com
Jamo R909 is quite similar, but with wide bafle way up. It has a smaller diameter mid.
Jamo : Floorstanding Speakers : R909
It's predecessor R907 had xos set at 250Hz and 2500Hz
Jamo Reference R 907 loudspeaker Specifications | Stereophile.com
Thank you both!
I was not aware of the two dipole12s having different xo's - nice to know!
I have all the drivers save for the tweeters, and will test out. Currently I am running a Mundorf amt tweeter (dipole), illuminator as mid and 2 x dipole12.
I first tried the dipone12s with low pass at 300 and 100 (3.5 way) but had a dip sonewhere around 150 - 250. I believe this was due to floor-bounce of the upper dipole12 and ran them parallell with LP @ 300 thereafter. Have not checked my measurements yet.
If I can get rid if the dip via eq, then I will change to 3.5-way again. Is eq an ok fix for floor bounce?
I was not aware of the two dipole12s having different xo's - nice to know!
I have all the drivers save for the tweeters, and will test out. Currently I am running a Mundorf amt tweeter (dipole), illuminator as mid and 2 x dipole12.
I first tried the dipone12s with low pass at 300 and 100 (3.5 way) but had a dip sonewhere around 150 - 250. I believe this was due to floor-bounce of the upper dipole12 and ran them parallell with LP @ 300 thereafter. Have not checked my measurements yet.
If I can get rid if the dip via eq, then I will change to 3.5-way again. Is eq an ok fix for floor bounce?
Floor bounce is not necessarily the cause of the dip, my guess is that it should be almost non-existent when 12s are run as a pair. Try different measurement distances, does it change or stay? Next fiddle with polarity and/or delay between bass and mid units, this is the most obvious cause of the dip as per my experience. ie. phase match between them, also a question of which order acoustic crossover slopes follow.
If possible, take measurements outdoors first, to avoid various reflections. This is really painful to get right indoors!
If you use passive crossover, you might be in trouble...
If possible, take measurements outdoors first, to avoid various reflections. This is really painful to get right indoors!
If you use passive crossover, you might be in trouble...
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Thanks Juhasi!
I use MiniDSP 4hd10 and 48db xo-slopes. (Might be to steep to get the correct blend, but I am at an early stage.
The dip is there when the dipole12s are run with different low pass.
I use MiniDSP 4hd10 and 48db xo-slopes. (Might be to steep to get the correct blend, but I am at an early stage.
The dip is there when the dipole12s are run with different low pass.
Hmm...
It has six channel Hypex amplification and uses DESQ (which has six channel output):
Are we sure that this is a 4-/3.5-way? If so, there must be an analoge crossover somewhere in the chain.
It has six channel Hypex amplification and uses DESQ (which has six channel output):
Are we sure that this is a 4-/3.5-way? If so, there must be an analoge crossover somewhere in the chain.
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