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ER-4p resistance converter?

post #1 of 5
8/11/12 at 2:21pm
Thread Starter 

I've been reading about mods that supposedly increase SQ of the ER4P by introducing a resistor to the input.  I am very confused as to how that improves sound quality.

 

If anything it reduces transient response, and I feel like it would resist different frequencies to differing degrees.

 

I understand the concept of higher impedance headphones, which is a product of lighter, less conductive drivers, but how would increasing the resistance of an intrinsically ~32 ohm driver improve the sound at all?

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post #2 of 5
8/13/12 at 9:53pm
Thread Starter 

anyone?

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post #3 of 5
8/14/12 at 3:08am

"Improvement" is relative. Mayhaps it will make the sound different, but whether that difference is better or worse depends on the individual. redface.gif

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post #4 of 5
8/14/12 at 3:09pm
The mod is a 75 ohm resister to turn the er4p into the er4s. Etymotic released the er4p as a lower-impedance version of the 4s, which (the 4s) they deemed more accurate to their reference curve. By adding a resistor you will get a notable bump in the upper mids and a slight decrease in the lower mids and bass. Try it and see which one you prefer.
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post #5 of 5
8/15/12 at 12:03am
Thread Starter 

so what im getting is that this is just an add-on that happens to bring up impedance? That makes more sense. It sounds completely rediculous for someone to artificially bring up impedance for the sake of sound quality, after all, the driver's still receiving the same voltage.

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