IPhone 5 lifeproof case sound problems?

I just bought my lifeproof case off eBay and the sound is terrible with out headphones. Does anyone have a fix?

EBay isn't an authorized seller of LifeProof's and tons of the cases being sold on there are counterfeit. I would contact the reseller and request a refund. Then purchase the iPhone 5 case from LifeProof's website or an authorized retailer.

No. I don't like lilfeproof, I rather get Defender Series Case for iPhone 5, 30% off is a good news