Intro The diversity of audio products grows just as the market of portable audio sources like phones, tablets, portable hi-res audio players, DACs. We use them for music listening and every so often plug them into our home stereo systems or car audio, we plug our sources at our friends’ homes to boast our music collection and so on. Many of such portable devices have good DAC chips but unfortunately not so good output stage due to size and components constraints such as op-amps built to a lower price point resulting in less than ideal output...

Intro   I still remember that day when I received Burson V5i Dual Opamps in my mailbox.     It was 3 days prior to passing my 8 hour long engineering lab exam of my life to finally get certified under the CCIE program. Before passing the exam I could hardly do anything else but to sit in front of multiple console screens all days long for over 500 hours taking breaks only to have some sleep, eat and attend work of course.   Now when the nightmare was over and I could have my life back again there was a couple of Burson V5i opamps lying on my...