Home-Made IEMs
Aug 2, 2020 at 9:13 AM Post #11,373 of 16,029
I am just soldering wires to my drivers, the litz wire from aliexpress seems too thin. A quick search reveals it is AWG 46. Max current capacity for this gauge is ~0.01A, whereas generally running 100mW at 1V RMS, you could expect a current of 0.1A. 10 times more.

Is this stuff up to the job? Am I worrying over nothing?

If we strive for decent 3.5mm to MMCX cables of say AWG26, isn't it a huge bottleneck if the IEM has 46AWG internally?

Shall I just buy some multistrand AWG32 teflon coated cable given its overall low outer diameter?
 
Aug 2, 2020 at 9:32 AM Post #11,374 of 16,029
I am just soldering wires to my drivers, the litz wire from aliexpress seems too thin. A quick search reveals it is AWG 46. Max current capacity for this gauge is ~0.01A, whereas generally running 100mW at 1V RMS, you could expect a current of 0.1A. 10 times more.

Is this stuff up to the job? Am I worrying over nothing?

If we strive for decent 3.5mm to MMCX cables of say AWG26, isn't it a huge bottleneck if the IEM has 46AWG internally?

Shall I just buy some multistrand AWG32 teflon coated cable given its overall low outer diameter?
Did you measure the diameter? I can hardly imagine that the wire is 46 AWG = 0,0399mm i think i somewhere read that it is 0,17mm thick (33 AWG).
Don´t worrie about the load the wire has plenty of headroom.
 
Aug 2, 2020 at 9:41 AM Post #11,375 of 16,029
Good point, will measure. It is 0.17mm including outer insulation. 0.14mm excluding, so thats AWG35. Max current of 0.044A, still slightly under the calculated requirement of 0.1A.

Should I not worry? Others have used this exact wire without problem? It is going to be driving the 38D1XJ as hard as I dare so will be making good use of the wire!
 
Aug 2, 2020 at 9:48 AM Post #11,376 of 16,029
Where do you get those max current ratings from? Yes others are using this wire without any problems. Don´t forget that it is silver coated which reduces the resistance and 0,1A constand is pretty unrealistic i would say. Think about it, some of those drivers reach 120dB at that power which is not a loudness level you would be listening music to :p

Wait i just assumed that you used the wire from Soundlink (Estron) Maybe you could provide a link?
 
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Aug 2, 2020 at 11:38 AM Post #11,382 of 16,029
Look it says 0,100 V RMS!, so that combined with the impedance of minimal 10 ohm makes for a current of 0,1/10=0,01A. So no need to worry!

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Aug 2, 2020 at 12:56 PM Post #11,385 of 16,029
I would also have guessed parallel so that they both get an equal share, rather than having only half the potential voltage. But I seem to recall someone wiring them in series earlier in this thread? Had a quick search, couldn't confirm....
 

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