- Jan 24, 2005
Forgive me if I'm being a complete idiot here, but I was under the impression that the Schitt Valhalla had an output impedance of up to 600 Ohm, hence why I bought them in the first place.
Also, I couldn't find anything about a ETY P-S cable on google other than them being attached to a specific brand of IEMs (Also not really much of a DYI guy yet as I work a lot with college on top of that.) What exactly do the impedance adapters you're talking about do?
Output impedance and output load are often used interchangeably which sucks because they mean totally different things.
Output load (which is what I assume you/they) are talking about is just that - you can use this bit of gear with headphones in this range.
Output impedance is a different thing.
In a nutshell, it means that the output AC voltage varies in response to the load. Since most headphones have frequency VS impedance graphs that are not flat certain areas will be bumped up a couple db, others dropped down. When you have a very low output impedance the effect where audible response follows impedance (at least somewhat) does not happen. Depending on the headphones, it may be BETTER that it does not happen! There are several standards covering how headphones should respond to amps, MFR's are free to follow any that they happen to like (different ones for different headphones even!), and never tell anyone which they follow. A little experimentation here can yield VERY nice results.
The ETY P-S cable is a cable with a resistor in it. I mentioned it because this particular brand used to be very popular, but any will work. They are not hard to make yourself, and are available on Ebay too If you are making one, Id start with 120ohms.