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........ Quote:
Originally Posted by electropop /img/forum/go_quote.gif Oh yes, you do make some good points. Though to my knowledge, the headphone out of iPods is exactly the same when you are using the line-out (the pins that give you a signal with the volume control disabled), which is what I used for convenience. Impedance issue and power is one thing, as you stated, but I really hear no improvement with the use of LOD over 3,5mm out of the headphone plug (volume max) to an external amp. Interesting measurements on some older ipods. iPod Measurements And yes, you are correct seems the attenuation of the signal along with impedance is the HP out jacks biggest issue on the older models. I can confirm that the newer ones like Nano and Touch sound way better through HP out. Try using a specific LOD using the pinouts on the "Botttom" of the ipod not the HP out to feed your amp, I am pretty certain you will hear an improvement. And using closed "portable" or DJ-phones that are efficient enough, I can't say that I'm hearing much, if any, improvement in the sound-quality per se. Again, you will not using a cable from HP out! But what you are saying, is that an iPod's volume controls are not based on digital attenuation, but something analogue, like a potentiometer? So using an LOD you skip an OPamp, or what? Point me to a source where I can learn, since I'm not certain of this either. Not certain of the exact topology but there is a difference, noted by many. try google and of course here at headfi You're right, I don't have much experience with different iPods. I currently have the 160gb classic (not the very latest one), 40gb ancient one and a shuffle. Maybe I need to dig the others up for some reference.. |