Originally Posted by mpawluk91
Why do some people use caps as big as they're dap then?
Different qualities of material.
Take a 4.7 cap for example. Electrolytic caps are tiny and can have huge uf ratings. Many people think these are fine, perhaps because of the convenient size. I personally think the sound is lacking.
Next there is polyester film caps. In the same 4.7 rating, each cap is about 2-3 times the size of the electrolytic. But it will still fit in a deep back iPod. These sound much better and is the minimum quality I would recommend to use with the mod.
Next film cap is polypropylene. These sound fantastic! But the size of one in a 4.7 rating is about half the size of an iPod and more than twice as thick. Also pretty expensive. That's the giant caps you see.
Then there's other more exotic materials but I won't comment because I haven't tried them.
Personally, my favorite iPod mod has two fairly large 3.3uf Wima polypropylene caps mounted in an altoids tin on the back of my 5G iPod. Any larger value wouldn't fit the tin. It's all wired from the DAC with solid silver wire to the caps then direct to the line out pins, bypassing everything in the iPod.
It sounds great but it's big and ugly! A sensible middle ground is the polyester film caps, maybe Dminor will chime in here and back me up.Edited by thegrobe - 5/25/13 at 4:05pm