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Multi-Way Conventional loudspeakers with crossovers

B&C DCX464
B&C DCX464
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Old 14th August 2019, 06:50 AM   #81
phase_accurate is offline phase_accurate
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Cool - which waveguide do you want to use with them ?

Regards

Charles
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Old 14th August 2019, 07:38 AM   #82
daemonsgr is offline daemonsgr  United Kingdom
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Any idea on "basic" crossovers for this?
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Old 14th August 2019, 11:11 AM   #83
Ale55andr082 is offline Ale55andr082
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Hi, a pair of questions, if I may:

-this coax CD have some shorting ring? the datasheet say nothing about it

-there is some horn (from B&C or other brand) that on pair with DCX464 can produce a similar curve like that one showed on the datasheet? Even a curve that roll on around 7-800Hz might be ok...


thanks in advance (..and sorry for my bad english :/)
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Old 15th August 2019, 03:04 AM   #84
rotgg is offline rotgg  United States
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Originally Posted by phase_accurate View Post
Cool - which waveguide do you want to use with them ?

Regards

Charles
Will be using a new customers waveguide
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Old 19th August 2019, 04:17 PM   #85
Bennett Prescott is offline Bennett Prescott  United States
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B&C DCX464
Quote:
Originally Posted by Ale55andr082 View Post
  • this coax CD have some shorting ring? the datasheet say nothing about it
  • there is some horn (from B&C or other brand) that on pair with DCX464 can produce a similar curve like that one showed on the datasheet? Even a curve that roll on around 7-800Hz might be ok...
Hey Alessandro,

The coax uses a copper cap on the HF section only, we found no benefit to using any shorting device on the MF section. Regarding the horn, I am unaware of any off the shelf horn that can go to 300Hz. We use two large horns in testing and measurement at B&C, the one used for the data sheet is attached.
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File Type: pdf 2019 03 Suggested DCX464 test horn.pdf (35.2 KB, 53 views)
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Old Yesterday, 04:04 AM   #86
LineSource is offline LineSource  United States
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Originally Posted by Bennett Prescott View Post
Hey Alessandro,

The coax uses a copper cap on the HF section only, we found no benefit to using any shorting device on the MF section.
B&C needs a more aggressive and more powerful marketing team.... for speaker motors, a copper cap is GOLDEN BABY!

I remember in the "Mad Men" TV series the marketing team was able to sell cigarettes by using the phrase "It's toasted" to describe the tobacco

Personally, I now think less of the DCX464 sound quality. Go figure.
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Old Yesterday, 04:50 AM   #87
Patrick Bateman is offline Patrick Bateman  United States
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I've built plenty of 2-ways and 3-ways without a copper cap or shorting ring on the midrange, because it wasn't worth the expense.

For instance, if I'm crossing over from a smaller midrange to a tweeter, I don't need a shorting ring because I'm just not playing the midrange very high.

I imagine B&C used a similar decision process in their design.

If you're trying to get a 12" or a 15" to play up to 2khz, it makes sense, but for a 5" or a 6", it's less compelling.
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Old Yesterday, 06:16 AM   #88
phase_accurate is offline phase_accurate
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Quote:
If you're trying to get a 12" or a 15" to play up to 2khz, it makes sense, but for a 5" or a 6", it's less compelling.
And even here it is not the diameter of the driver itself that makes the difference regarding the shorting ring - it is the diameter of the voice-coil (which is usually larger on larger drivers) that results in a higher voice-coil inductance.

Regards

Charles
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Old Yesterday, 09:37 AM   #89
daemonsgr is offline daemonsgr  United Kingdom
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Quote:
Originally Posted by LineSource View Post
B&C needs a more aggressive and more powerful marketing team.... for speaker motors, a copper cap is GOLDEN BABY!

I remember in the "Mad Men" TV series the marketing team was able to sell cigarettes by using the phrase "It's toasted" to describe the tobacco

Personally, I now think less of the DCX464 sound quality. Go figure.
Sorry, this mean better quality or worse? Cant get what you mean in your last line.
Thanks
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Old Yesterday, 11:49 AM   #90
300Z is offline 300Z  Brazil
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Quote:
Originally Posted by Patrick Bateman View Post
I've built plenty of 2-ways and 3-ways without a copper cap or shorting ring on the midrange, because it wasn't worth the expense.

For instance, if I'm crossing over from a smaller midrange to a tweeter, I don't need a shorting ring because I'm just not playing the midrange very high.

I imagine B&C used a similar decision process in their design.

If you're trying to get a 12" or a 15" to play up to 2khz, it makes sense, but for a 5" or a 6", it's less compelling.
And to expand on this, a neo magnet will inherently have lower inductance than a ferrite magnet system. A copper cap simply may not be needed in the application.
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