Great Seller of Audio Products and Accessories Great seller of audio products and accessories! Had an issue with an order and they were prompt, courteous, and kind with replacing an incorrect shipment. I've purchased a few things from both Adv and their sister site, Eartune, without issue. Heard about the site from an audio reviewer website that had reviewed the Model 3 Wireless headphones (which were the first thing I bought from ADV). Since then I've purchased a wireless bluetooth receiver, a USB C to 3.5mm headphone adapter, as well as some eartip replacements! Overall a great site to buy some underrated products!

The ear impressions are really comfortable The ear impressions are really comfortable and I can wear them for a long time. They really enhance the sound by blocking noise. I would like to have received more detailed instructions to insert the custom buds into my ears. I had to use trial and error to figure out the optimal way to insert them.

Custom tips for Z1R Fantastic experience doing business with ADV. I ordered a set of custom tips for Sony IER-Z1R. ADV delivered a perfectly fitting set of tips in far less time than originally estimated, and was also able to deliver 3D scan files of my ear impressions for further use.

Great product with exceptional sound… Great product with exceptional sound quality. I plan on purchasing from ADV. in the future.

Ordered Eartune Fidelity U for my IER… Ordered Eartune Fidelity U for my IER Z1R. Best tips with this IEM after trying lots of eartips. Solved the recessed mids problems with some songs, especially male vocals. Hearing more elusive details too. The only thing making me hesitate to give a 5 stars rating is shipping is so so and expensive.