Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: why are they non returnable?
Document: Right out of the box, the  right speaker with the controls sounds ''blown''. VERY disappointed. Am having trouble returning as it looks like this is non returnable... Really? A  inoperable  system is not returnable? I  bought this to replace an inoperable system.. waiting on Amazon.
These speakers have a great sound with a great bass boost. My husband initially ordered them for his computer for gaming, but found out they didn't support the microphone on his headphones. These speakers are non returnable, which we didn't see before ordering and which is the only reason I didn't give them 5 stars, so I'm using them on my indoor XM radio receiver and the sound is amazing.
I'm disappointed with the non-returnable clause, and might consider trading them for something that better suits my needs.As I said, these are not bad speakers; but are definitely not suited for everyone. If you have a small apartment or dorm room and are looking for a small set that will fill the room for use with your media center, these would probably be the ones to get.
Of course it would distort at a certain overdriven input level but if you respect it's limitations it's fine for most rooms in your home and could be used even for a dance party in your house. The highs are fairly clean , the mids are a bit hollow but overall sound is great. It's really worth it for the price and certainly is a step way above the average computer speakers/subwoofer combination. One weird thing was on receiving it, I saw something about it being non-returnable somewhere in the package.
This package includes 2 satellites (small desktop speakers) and one subwoofer. I guess the subwoofer and the right speaker are just for show 'cause no sound is coming out of either!I really don't have the time for this... Reluctantly, I go to the refund page and find out that the item is not returnable!&#34;For safety reasons, items that are classified as hazardous materials or use flammable liquids or gases cannot be returned to Amazon.com.
Speakers sound good, but for me they hiss and crackle. Very noticeable in a quiet room. I've tried different outlets in different rooms, and different sources all together. Amazon gave me a giant middle finger and said that since it is a hazardous material it isn't returnable (weird that UPS had no trouble delivering it the first time). I guess they're referring to the magnets in the speakers themselves. They also hide this fact in the &#34;technical details&#34; tab on this page.
The Sub is fantastic, but the speakers were a little lack-luster. My roomate blew the non-control speaker the first weekend i had it.
But the ease of use for a non tech person that just wants to plug in and listen may get overwhelmed by the bass to treble combination.
I have now purchased TWO of these. The second was to replace some rubbish Harmond Kardon rubbish that stopped working after eight months. Whilst the HK's looked very sleek an non obtrusive in my lounge room, their sound quality and volume is a fraction of the Logitech.
Written by a non-audiophile:Bought these as an upgrade for my Logitech z523 speakers, which sounded great but didn't have a lot of power. I was surprised by how much bigger the z623 subwoofer is, but wow - awesome sound (markedly better than z523), and these things can get LOUD.
Answer: Not sure, but I was able to return them even though it said non returnable.  The first set of speakers I got stopped working after a minute.  So I just called Amazon's amazing customer service and they said I could return and exchange it.  Got the new ones last week through expedited shipping and haven't had any problems with them since.  Great speakers!