Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
If you have never heard of Polk systems, please don't do like I did and prejudge or be skeptical about the sound. It's simply amazing how good these speakers compliment the surround sound effect. I can get the full output of these speaker because it would blow me out of the room. Don't get surprised like I did. Great sound for a great price!

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