Sennheiser MX 55 VC earbuds are from the Street series from Sennheiser.
The earbuds were tested in AeroPlayer v5.4 in a Palm Tungsten T5, Tungsten E2, and Sony PSP.
They offer an even enhanced bass response, volume controller, and most importantly a Twist-to-Fit mechanism for an optimal fit. They also come with a carrying pad made of a synthetic cloth material, and many accessories.
They sound great and the bass response is perfect, as is usual with Sennheiser phones.
Now to the Twist-to-Fit thing;
Each of the buds has a smaller circular piece of rubber above it which, according to Sennheiser, fixes itself onto the inner part of the ear lobule to enhance sound isolation and fitting, especially if you’re jogging or just walking down a busy street.
I’ve found that the mechanism does work as advertized, and is comfortable, unlike what I had thought of before buying the phones. You just need to push the buds into your ears, and twist it back and forth, in order to get the rubber thing in place. Sounds complicated, but it’s not at all in reality. It just takes a couple of seconds to put them on.
The inline Volume Controller
The inline Volume Controller is a nice extra, but it’s not perfect. Its surface is so smooth; moreover, it’s so sensitive, so it makes controlling the volume a bit unprecise. You end up going all the way up or all the way down.