Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
First I'd like to say that these were my second headphone purchase and I'm a bit disappointed(first was Numark HF125).  I've used the r-80 with a CD player, an ipod, and then hooked both up to an amplifier.  The difference in quality was noticeable with an amp or even a mixer, probably by 25%. What I've noticed was that the bass wasn't as clean or deep sounding as the cheaper Numark.  The Numark did not rattle or distort with the volume at 75% high whereas the Koss R-80 was just the opposite.  The vocals were decent though.  This is probably better for watching TV or movies.

The build feels a bit cheap, but it doesn't break.  Outside noise doesn't get fully blocked out but then again, its not an in-ear monitor.

What I loved about these headphones were its long telephone-like cord that  doesn't tangle.  It felt pretty comfy on my head, but i still did feel a bit of pressure after wearing it for more than an hour(I've got a large head), but not to the point where it hurts or annoys me too much.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: C: neutral