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  #11  
Old 30th March 2021, 07:42 PM
VantheMan VantheMan is offline
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Default Re: Air core coil for the wd25tex coil anyone.

Well, theyŽre on their way. Then IŽll have to wait for my EE mate. He insists that heŽll run me up me a new crossover PCB on his machine to admit their large flat spool instead of the stumpy ferrite one. No sweat cos I have my external crossovers in a box next to my amp. He says that after changing the caps and the resistors the original PCBs are looking a bit the worse for wear.
Dunno if IŽll hear anything new but for some reason Peter opted for an air coil on the tweeters so why not on the woofers, I say.
I still prefer listening through my Beyer DT531 cans to any speakers, anyway.
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  #12  
Old 13th May 2021, 04:58 PM
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Yellow Yellow is offline
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Default Re: Air core coil for the wd25tex coil anyone.

Quote:
Originally Posted by VantheMan View Post
Hi,
Yes, according to the Jantzen page the power handling in 14awg is 500w. and the values I chose are 0.76 and 0.21 DCR. Whatever that means. ....
You should be fine. The 0.76 refers to the inductance measured in milli-henries - 0.76mH; and the DCR is the DC Resistance - 0.21ohms in this instance.
Swapping your ferrite cored inductors for air core types is generally a good thing, but if you don't listen at very high-levels, you probably won't notice any improvement. Generally, as the inductor(s) is in series with the LF drivers, they can start to saturate at high levels and air-core types give better results in that regard. The inductors that are in parallel with the tweeter and mid-range if they are 2nd-order or higher, should be air-core where possible.

Regards,

Neil.
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Audio-Note CD2.1x/AN-V i/c. Audio-Note M1 with A-N Copper PIO caps & AN-V wire, WAD KaT6550, NAD C368 Hybrid Digital DAC Amplifier with BluOS - Mountain Snow Atlas 2 speaker cable. Bowers & Wilkins Nautilus 804
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  #13  
Old 13th May 2021, 07:37 PM
VantheMan VantheMan is offline
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Default Re: Air core coil for the wd25tex coil anyone.

What happens with 2 ways where the woofer is really a mid-woofer as in my case ?
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  #14  
Old 13th May 2021, 07:55 PM
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Yellow Yellow is offline
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Default Re: Air core coil for the wd25tex coil anyone.

Hi,
So in the case of a 2-way, the LF unit is rolled-off at say 3kHz or so using an inductor. A 1st order filter will use just an inductor in series. If it is 2nd order, then you'll find a cap across the +ve & -ve terminals of the driver as well. My comments above still stand. An air-core will generally sound better than an iron-core inductor. The problem with air-cores, is that they can be very large physically, when compared to a ferrite-cored inductor of the same inductance.

Regards,

Neil.
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