Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
These really sounded nice for about 2.5 weeks, but then died in a 1 minute span - one channel, then the other, then loud popping sounds coming out of them. (usually used them at about 20% capacity)  Never was able to get them to amplify input signals again. I talked to Tech Support, but once they found out I got them from West Audio, who is not an authorized retailer, they closed my ticket.  So, get a warranty.

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