This comparison has come up a few times lately. I'll give you a couple links to my responses regarding the comparison.
Originally the comparison came up in the following thread. You can read my response and the rest of the thread if you want.
http://www.avsforum.com/avs-vb/showpost.php?p=15940399&postcount=221
We got a little more into some of the specifics on page 2 of this thread here:
http://www.avsforum.com/avs-vb/showthread.php?t=1127393&highlight=2226h&page=2
In general the TD12M will have better power handling/power compression due to the way the copper sleeve pulls heat from the coil. It will have cleaner high frequency extension as there is no dustcap breakup and a much better damped cone breakup. High frequency extension is also much higher due to the lower inductance. The lower and more linear inductance also means, much lower distortion due very little change in Le with excursion and greatly lowered flux modulation. All in all there isn't much of a comparison.
John
Originally the comparison came up in the following thread. You can read my response and the rest of the thread if you want.
http://www.avsforum.com/avs-vb/showpost.php?p=15940399&postcount=221
We got a little more into some of the specifics on page 2 of this thread here:
http://www.avsforum.com/avs-vb/showthread.php?t=1127393&highlight=2226h&page=2
In general the TD12M will have better power handling/power compression due to the way the copper sleeve pulls heat from the coil. It will have cleaner high frequency extension as there is no dustcap breakup and a much better damped cone breakup. High frequency extension is also much higher due to the lower inductance. The lower and more linear inductance also means, much lower distortion due very little change in Le with excursion and greatly lowered flux modulation. All in all there isn't much of a comparison.
John
MisterTwister said:is there a reason, besides cost, why manufactures don't use ferrofluid for cooling woofers' coils?
I believe that a few do. But in a woofer you have issues of heat & excursion trying to send the ferrofluid thru the dustcap into the outside world, so it is not as easy to do, and requires a different formulation.
dave
John_E_Janowitz said:This comparison has come up a few times lately. I'll give you a couple links to my responses regarding the comparison.
Originally the comparison came up in the following thread. You can read my response and the rest of the thread if you want.
http://www.avsforum.com/avs-vb/showpost.php?p=15940399&postcount=221
We got a little more into some of the specifics on page 2 of this thread here:
http://www.avsforum.com/avs-vb/showthread.php?t=1127393&highlight=2226h&page=2
In general the TD12M will have better power handling/power compression due to the way the copper sleeve pulls heat from the coil. It will have cleaner high frequency extension as there is no dustcap breakup and a much better damped cone breakup. High frequency extension is also much higher due to the lower inductance. The lower and more linear inductance also means, much lower distortion due very little change in Le with excursion and greatly lowered flux modulation. All in all there isn't much of a comparison.
John
Seems like the Lambda driver is my best bet.. BUT are they ready to be shipped imidietly? Think ive read somewhere that it may take a while from the actual order, to the driver is at my door due to Acoustic Elegance being very busy lately. Im worried because when I sell my 2226H drivers, im without sound untill the new drivers arrive..
Has anybody tested the practical excursion limit for ferrofluid filling?planet10 said:
I believe that a few do. But in a woofer you have issues of heat & excursion trying to send the ferrofluid thru the dustcap into the outside world, so it is not as easy to do, and requires a different formulation.
dave
badman said:Would be a shame to soak magnetic fluid into the paper cone
One of the ways you check to see how much abuse an Advent tweeter has had.
dave
planet10 said:
One of the ways you check to see how much abuse an Advent tweeter has had.
dave
Hey, did you measure motor strength related to this? I'd think it'd act as a brake to motion in one direction and an enhancement in the opposite (Presumably it would 'pull' towards the polepiece), probably increasing even order distortion quite a bit.
Any observable effects related to this you noted?
badman said:Hey, did you measure motor strength related to this? I'd think it'd act as a brake to motion in one direction and an enhancement in the opposite (Presumably it would 'pull' towards the polepiece), probably increasing even order distortion quite a bit.
Any observable effects related to this you noted?
Never measured any of this. The comment was ref that if you start overcooking the tweeter, the ferrofluid starts to boil and tries to escape thru the dustcap, leaving a very visible brown discolouration.
dave
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