You must have a audio system that can give this improvement ( audiophile system ) ..... you can not ear the difference with a PC speaker !
For a better output signal , change the opamp for a discret or a tube design . 
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You must have a audio system that can give this improvement ( audiophile system ) ..... you can not ear the difference with a PC speaker !
For a better output signal , change the opamp for a discret or a tube design . 
I Modded my Emu 0202 too.
1. replaced output coupling capacitors from the DAC to the opamps to Nichicon Muse ES 100uF/16v
2. Replaced power supply filtering capacitor with Nichicon Muse FW 3300uF/50v.
3 Add parallel opamp njm2114 in headphone amplifier - increase output power of headphone amp(lower thd and imd)