Advanced Sound has earned a reputation on Massdrop for making innovative, value-priced IEMs. With the Eartune Fidelity custom-fit ear tips, the company gives you a compelling, comparatively inexpensive solution for converting your trusty universal-fit IEMs into CIEMs. How? These ear tips are made of medical-grade silicone using your ear impressions—meaning they’re designed to fit perfectly into your ear canal, and yours alone. By filling the precise crevasses of your ear canal, these tips provide up to 25 decibels of noise isolation, improving the bass response and treble extension and bringing out the best in your IEMs. Without the pressure points caused by conventional ear tips, you’ll get maximum comfort for hours of use. 

After the drop ends, you'll have the option of sending a 3D scan file or mailing impressions to Advanced Sound. If you decide to send impressions, you'll be responsible for having impressions made with an audiologist and sending them to Advanced Sound in Santa Cruz, CA (address will be provided). The vendor must receive tracking info on the impressions within 3 weeks of the drop completing, or the offer will be canceled and refunded—no exceptions or extensions.