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iPod Classic LOD and headphone out measure the same

post #1 of 5
Thread Starter 
Quote:
Originally Posted by Raguvian View Post

LOD bypasses the internal amp on the iPod
Quote:
Originally Posted by saratoga View Post

No, we just set the volume to 0dB for the line out. […] And while I don't mean to pick on you guys since this seems like a common misconception, but line out doesn't 'bypass' anything, and you certainly are 'double amping' if you hook up another amp to the line out. On modern electronics, a line out is basically a second amp that has its volume adjusted independently of the headphone amp for use with powered speakers. Its to prevent you from blowing out accessories while allowing the DAC vendor to save money by not including the whole cost of a second headphone amp. Usually its just a cheaper amp that doesn't need as much current capacity since its discharged into a higher impedance load then the main amp. Unless something is weird with the design, the output into a high impedance load should be identical. Given how well the Classic's headphone amp drives a high impedance load, there is almost certainly no improvement from using the line out.

I RMAA'd my Rockboxed iPod Classic from the LOD and the headphone out, and they pretty much measure the same (except for the LOD crosstalk value that's a little weird - it doesn't show with the original firmware).
Edited by skamp - 7/21/13 at 3:56am
post #2 of 5

I have wondered about this.....my Classic did seem to still sound quite good from the headphone out. But since I despise using the clickwheel for volume, I'll continue to use my LOD and amp.

post #3 of 5
Thread Starter 
The Clip+ paired to the FiiO E7 is slightly worse than on its own, and the E7 doesn't even amplify all that much :-/
post #4 of 5

Interesting discussions..

post #5 of 5
Thread Starter 
Updated links: Headphone Out, LOD (both running Rockbox).
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