
Mark Levinson No.38S preamplifier Review System

Mark Levinson No.38S preamplifier Review System

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I'm looking to improve my headphone experience, either with better cans or a small and portable amp. Some background:
I've been using Sennheiser 497s for years. I love the sound from a plugged-in source, but from my mp3 player they are questionable.
I used Etymotic ER-6 in-ears until I lost then on a trip, then got the ER-6i, which is almost as good. These drive well from the MP3 player.
At my desk I run FLAC-compressed CD rips (run through Dolby Headphone in software. Bliss.). On the MP3 player I select high bitrates when converting.
Total budget under $500.
I thought this was an interesting description of trying different capacitors to see what difference they made to the sound and how he tested them
Scroll down to the Grounded Grid Cap Test part way down the page.
http://www.troelsgravesen.dk/GG.htm#GG%20cap%20test:
Also, check out the Russian Capacitors in pic #4. Jeez