Bought this item for my laptop at work. I usually plug in my headphones and listen to Pandora all day. I was hoping this article would amplify the sound. When it arrived there were no instructions. It wasn't a plug-n-play item, although it installed itself. I searched on YouTube and figured out how it works. The sound produced has completely changed from CD quality with headphones connected directly to the laptop to AM with a sound card. I do not understand. How does this device designed for audio degrade sound quality? It's not the seller's fault. The seller sent from China on time and carefully. The item was ridiculously cheap. You get what you pay for.
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