My 2-way has a 0.76mH iron-core series woofer inductor with DCR 0.2R. Might changing to a Jantzen air core with 0.17R be a good move or as a technical friend says "a coil is a coil " ?
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'Better' is not necessarily the case. Sometimes, a higher DCR can reduce the peak that results from a large lowpass coil in relation to the driver's Fs. Sometimes, a larger DCR can be beneficial in balancing the levels of the woofer compared to the tweeter. Changing DCR on the lowpass can actually change the woofer's box response profile- moreso when more of a change in DCR.
That said-
0.2 to 0.17 ohms is likely not much of a difference to make a change for better/worse.
Often times, less resistance will allow a driver to sound more open and unrestrained. You can test this just adding resistance to a pair of speakers and see/hear for yourself.
In a tweeter circuit, I had a lower DCR coil + resistance that matched a higher DCR coil's DCR; and the larger wire coil and resistor sounded better.
Your mileage may vary,
Wolf
The difference between 0.2 ohms and 0.17 ohms in series with a 8 ohm or 4 ohm woofer is miniscule. But the difference between an air-core or iron-core inductor could be significant under some circumstances.
An iron core is used to concentrate the magnetic field produced by current through the coil. This allows a higher inductance while using less copper wire, and is a cost-effective way of achieving higher inductance while keeping dcr low. The alternative is an air core coil with more turns and thicker wire.
But this only goes so far. At higher currents the magnetic field will saturate the iron core and this will change the inductance. Air core inductors do not saturate, so the inductance value is stable even at higher currents.
An iron core is used to concentrate the magnetic field produced by current through the coil. This allows a higher inductance while using less copper wire, and is a cost-effective way of achieving higher inductance while keeping dcr low. The alternative is an air core coil with more turns and thicker wire.
But this only goes so far. At higher currents the magnetic field will saturate the iron core and this will change the inductance. Air core inductors do not saturate, so the inductance value is stable even at higher currents.
Depends what you perceive as a good move. Let's assume you make a
fancy looking XO filter, place it out of the cabinet in a transparent box so
everyone enjoys the view and than your friend(girl), who happens to be
an audiophile, sees it, falls in love with you right away. Surely that would
be a good move, at least for awhile or maybe not.
Not another girlfriend falling in love with me, please although I must admit I´ve never had an audiophile one. After so many I´m tired of that. Music is much more rewarding in the long run.
Seriously, I have changed the resistors for Mills and the series tweeter poly caps for teflon (Russian FT3) and PIO WBGO-2. I like what I have achieved so far and just thought I would "upgrade" the rather homespun series coils I have for something, hopefully a little better. A bit more bass presence would be nice from my closed boxes (WD25TEx).
Seriously, I have changed the resistors for Mills and the series tweeter poly caps for teflon (Russian FT3) and PIO WBGO-2. I like what I have achieved so far and just thought I would "upgrade" the rather homespun series coils I have for something, hopefully a little better. A bit more bass presence would be nice from my closed boxes (WD25TEx).
Of course you are and you should be. They were the wrong ones.
Say again! Is there any rule that sais you can't turn your closed box
into a ported one? How about electronic aids.
Yes, and beside that your driver will be ready to be sent to a cemetary
due to burns of 3rd degree.
sounds too simplistic, so yeah technically he might of been a friend.
a real friend would tell you to get the larger speakers!
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Lojzek is right. 10" driver Seas A26RE4 H1411 was made for a reflex (if your amp >10W) or in a fashion case for an aperiodoc "à lá Dynaco". (You also have the vents on sale. Look as an example, for Madisound reference #290001 Aperiodic Vent (SSV) - $23.80)
Just give us the volume (net) of the enclosure, for a reflex projecr, we will give you the right alignment and tuning/ducts. For an aperiodic is just adding the port on sale above ().
10" driver with a single 0.8 mH sounds like a 'text book' 2 way/8 ohms AKA no BSC. need the schematic to confirm.
bass will be lacking unless backup'd against a wall or redesigned with new Xover design.
yes a 10" 2 way is difficult and will have off-axis suck-out at the cross ~ 2KHz.
jigging around with same value lower DCR L's and ports/ vents will give marginal results.
IMO leave it , it is what it is. or as Lojeck would say "a speaker is a speaker"😛
bass will be lacking unless backup'd against a wall or redesigned with new Xover design.
yes a 10" 2 way is difficult and will have off-axis suck-out at the cross ~ 2KHz.
jigging around with same value lower DCR L's and ports/ vents will give marginal results.
IMO leave it , it is what it is. or as Lojeck would say "a speaker is a speaker"😛
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It's Peter Comeau "wall of fame" so it should work?! The crossover is readily available. Let's hear OP.
Note: the woofer is already high inductance w. 3.8 mH.
Note: the woofer is already high inductance w. 3.8 mH.
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The WD25Tex is a sealed floorstander divided into 2 compartments with an aperiodic port communicating them and I think it works pretty well placed flush against the rear wall. I just want a bit more of everything.
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Here is the general idea
http://user.faktiskt.se/M_N/WD25T_Part1.pdf
and here is the final version with the Millennium tweeter, as is mine :
http://www.hi-fiworld.co.uk/loudspe...ning-loudspeakers-wd25t-ex-the-next-step.html
http://user.faktiskt.se/M_N/WD25T_Part1.pdf
and here is the final version with the Millennium tweeter, as is mine :
http://www.hi-fiworld.co.uk/loudspe...ning-loudspeakers-wd25t-ex-the-next-step.html
wut.. you want an answer
lower DCR will give marginal results to a dry sounding speaker. invest in an equalizer and enjoy "more of everything"
common knowledge says "a dicked around commercial Xover will reduce value of said product." bad move
lower DCR will give marginal results to a dry sounding speaker. invest in an equalizer and enjoy "more of everything"
common knowledge says "a dicked around commercial Xover will reduce value of said product." bad move
Swarky,
Iron core inductors cause distortions while air core inductors do not. After having changed resistors and capacitors that's indeed an option for a final upgrade. Besides that there is little you can do since the WD25T EX is a well designed speaker with a very balanced crossover IMO. 🙂
Iron core inductors cause distortions while air core inductors do not. After having changed resistors and capacitors that's indeed an option for a final upgrade. Besides that there is little you can do since the WD25T EX is a well designed speaker with a very balanced crossover IMO. 🙂
My last option for your speaker, related with the coils is to get a 0 ohms inductor and do the tests. You have some places to look, one of them being @jantzen-audio(eu):
Two references for the same cored list
Two references for the same cored list
As was said it will have about the same extension in LF with marginal results. (infinia) 😎
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