Yinyoo Audio provides high-quality products for our customers with a keen eye for design and performance. We strive to deliver the better sound quality possible no matter the cost.

KZ ZSN PRO: ONE customized balanced armature driver and ONE 10mm dynamic driver, which provides excellent bass sound. It’s full of low frequency, rich in details. The sounds signature is balanced, coherent top to bottom with good deep solid bass, clear mid-range, good detail, and separation, soundstage.

Customers said：

• The bass is good and clean, the mids are clear, sound balance is very nice.
• They drastically improve the potential for power and clarity at the low and high end over previous headphone designs.
• They sound great! I'm not enough of an audiophile to give all the in's and out's of the sound frequency but they really are very full sounding. There's plenty of basses, but not overwhelming, and the mids are really nice.
• To my ears, their response is pretty balanced/flat which is what I prefer. Low-end is present without being distorted or boomy while mids are actually present (something most cheap headphones completely lack). As with the low/mid, the highs are presented, balanced, and pleasant. They are plenty for daily drivers/at the gym/etc.
• They are incredibly immersive. I mean be-there immersive. They put you inside the recording, perfections, warts and all. Bass is solid and articulate.

Q&A

Complaint: These earphones have no BASS! I should have bought anything else.

Answer: 1. A proper seal is important to get well based on IEMs. Somebody was able to get a good seal with the rubber tips. If want to get better isolation and bass response, you can try the foam tips on earbuds. (5mm Comply foam tips). 2.If you want better sound, you can always tweak that on your soundboard EQ.

Complain: These headphones won't stay in my ears.

Answer: Part of the cord is the "hold shape" type cord for a reason. if you have it "hanging" down from your ears you are wearing the earphones incorrectly. You probably need to swap the L and R cables... now get the cable so it exits the earphone "upwards" towards the top front of your ears. the "hold shape" cord will then wrap around the top of your ears. This is a very "stable" shape. and will hold even during rigorous activities.

Complain Detaches from the earbud.

Answer: You probably can try to swap the L and R cables.

Complain No sound on one side of earbuds.

Answer: Please use other earphones cable or swap the L and R cables to check if the cable has an issue.