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 :/)
-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 :/)
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.
Attachments
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.
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.
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 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
Sorry, this mean better quality or worse? Cant get what you mean in your last line.
Thanks
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.
Yee haw, just got notice my DCX464 shipped. Perfect timing for my current 100Hz synergy project.
Also, I'll post it vs the 4594he, on a XT1464, as soon as it arrives...
Also, I'll post it vs the 4594he, on a XT1464, as soon as it arrives...
Each halving of frequency increases excursion by 4. If it can handle 100w @ 400hz, it will handle 25w @ 200hz if your horn is big enough.
I was just refering to the question that was posed in a little strange way. The maxuimum power allowed will be the same , wheter used in a low power application or in a high power application. 😉
If there is no derating information for a desired frequency then you could calculate the DC power needed in order to reach X-max and then you are definitley on the safe side.
Edit: I was just checking the datasheet. Unfortunatley they don't mention compliance, x-max and BL factor in the data sheet which would allow a coarse estimation of what I mentioned.
Regards
Charles
If there is no derating information for a desired frequency then you could calculate the DC power needed in order to reach X-max and then you are definitley on the safe side.
Edit: I was just checking the datasheet. Unfortunatley they don't mention compliance, x-max and BL factor in the data sheet which would allow a coarse estimation of what I mentioned.
Regards
Charles
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