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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 25th July 2019, 03:47 PM   #1501
barossi is offline barossi  Germany
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Hi,

i like this one as well:

Click the image to open in full size.

FaitalPRO | HF Drivers | HF1440

New FaitalPro HF1440 Compression Driver Extends Frequency Response and Power in a Compact Format | audioXpress

KR Barossi
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Old 25th July 2019, 04:04 PM   #1502
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by AllenB View Post
I didn't think we were certain that these were any good?
Martin Colloms is testing it.
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Old 25th July 2019, 04:11 PM   #1503
AllenB is offline AllenB  Australia
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Quote:
Originally Posted by Ro808 View Post
now that the DCX464 has become available.
I didn't think we were certain that these were any good? (Yet, please correct me if I'm wrong).

Edit: Sorry Ro, edited this post. and thanks for your reply.
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Old 25th July 2019, 07:22 PM   #1504
daemonsgr is offline daemonsgr  United Kingdom
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Quote:
Originally Posted by Ro808 View Post
No reason to buy any of the BMS coaxes, now that the DCX464 has become available.
If you must... buy them used because these are offered plenty from second, third or ....... owner.
Why would that be?
nothing against it just:
a) not many tests or use cases in DIY..
b) only 16ohm version at the moment. (my supplier seems to have the 16ohm available 1st Aug) I'd like an 8Ohm CD


EDIT: I found a pdf in Italian with the 8ohm version. the freq graphs+extension seem better on the BMS

Last edited by daemonsgr; 25th July 2019 at 07:28 PM.
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Old 25th July 2019, 07:30 PM   #1505
daemonsgr is offline daemonsgr  United Kingdom
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Quote:
Originally Posted by ewollowe View Post
It certainly seems like the future regardless of price.
what makes it SO better that the BMS??
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Old 25th July 2019, 07:48 PM   #1506
silverprout is offline silverprout  France
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The phase glitch is not at the same frequency
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Old 25th July 2019, 07:50 PM   #1507
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by daemonsgr View Post
EDIT: I found a pdf in Italian with the 8ohm version. the freq graphs+extension seem better on the BMS

I'd suggest to look at the aspects that really matter and cannot be fixed by the user.
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Old 25th July 2019, 08:45 PM   #1508
daemonsgr is offline daemonsgr  United Kingdom
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Quote:
Originally Posted by Ro808 View Post
I'd suggest to look at the aspects that really matter and cannot be fixed by the user.
elaborate a bit plz? (as the user is a bit dum )

Last edited by daemonsgr; 25th July 2019 at 08:56 PM. Reason: spelling :)
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Old 26th July 2019, 12:07 AM   #1509
Ro808 is offline Ro808  Netherlands
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The DCX464 thread on this forum is one obvious source.

Quote:

Originally Posted by Joseph Crowe > about the BMS technology:

"The problem has always been with the co-entrant design where the high and mid frequencies have to combine somehow without causing the high frequency wavefront to encounter an abrupt physical change in the pathway curvature. Usually the high frequency sound wave has to "jump" a physical gap. This causes higher order harmonics to form which effects the performance of the driver in the time domain."


Bennett Prescott, B&C Sales & Operations Director – North America:

"We have mitigated this with our (patent pending) midrange filter, which makes the MF path look very high impedance to the HF driver and filters the higher response of the MF driver so it doesn't resonate in the HF cavity."


But I don't think Bennett tells the whole story. I believe the design of the DCX464 is also different from the BMS Coaxials.

Here I've posted a comparison of curves.

Last edited by Ro808; 26th July 2019 at 12:09 AM.
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Old 26th July 2019, 01:06 AM   #1510
Ro808 is offline Ro808  Netherlands
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A translated quote from a pro audio guy on BMS:

"I have had the BMS 4592ND, it does not compare to the (JBL) 2482 in the low freq. spectrum by far ... (and in general distortion figures of BMS coax drivers are bad).
I have also tested the 4599 (double dome), here again the figures are wacky, do not even correspond to BMS' own measurements and the amount of distortion is huge."


This is just one of many similar comments on the BMS coaxials that can be found online.

Just for the record, this is not to bash BMS.
I own several BMS drivers, just no coaxials


In my experience the curves of B&C are almost always a reflection of reality.

Last edited by Ro808; 26th July 2019 at 01:26 AM.
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