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Help with Low impedance adapter

post #1 of 2
Thread Starter 
I just got a schiit lyr to pair with my he-500, but also goin to use some d2000 and some grados with it, I've heard due to their sensivity you will need a 100ohm adapter...

I'm a bit new to this but willing to try so has anyone got a step by step guide or any advice on which risistors to use etc?
post #2 of 2

Basically you could just connect a 75 ohm resistor to each channel, that's a minimal description.

 

There should be 4 wires on your headphones, 2 of these will be wired to a common ground in your 1/4" plug, the resistors go on the remaining 2, somewhere between the driver and the plug.

 

These resistors should be just the ticket: http://www.ebay.co.uk/itm/10-x-75-Ohm-0-25w-Metal-Film-1-4w-Resistor-1-75R-/120783575656?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item1c1f431a68

 

They have a 1% tolerance, which means they can be out by at most 1% of their value, so each one can measure between  74.25ohm-75.75ohm. You can match them using a multimeter, 10 resistors should be plenty to find a matching pair.

 

Lyr has plenty of power to drive even the most power hungry headphones, so you could even use higher resistors, feel free to try :)

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