It's 8 ohms output I take it. Well the above FR is taken at the headphone load not the whole series so I don't understand what you mean by that statement.
Well, lower output impedance is desired, and what I'm thinking is when there is high enough output impedance, there will be considerable powerloss at certain frequencies from the source impedance to lower power transfer to the transducer if there is significan't amount of output impedance compared to load impedance, since voltage is being shared and a good chunk is dropped through the source load since it's considerable compared to load impedance.
What do you think would happen to the FR if 300ohm is at the load, 8 ohm vs 300ohm is a big difference? At that point would it be like an ideal situation of output impedance being considerably smaller than load impedance. So I would think the FR would not deviate too much then again the transducer is not getting enough power from the source. It will not sound good, but FR will be more stable?
I would like to see all this to get a better idea of how it works. I think I will have to find out.
Quote:
Originally Posted by
sgrossklass 
Easy, all you need is a 44/16 RMAA test file and a Y cable to connect both test load and soundcard input at the same time. And yes, this is best done with a spare set of IEMs depending on levels. Apparently they can take quite a beating but you just never know.
Amazing what 40-something ohms in series will do, huh?
Edited by High_Q - 6/12/11 at 3:31pm
looks like a work of art. How is he measuring all this stuff? I'd like to know.
