Dekoni AudioMercury Bulletz Moldable Memory Foam Isolation Earphone Tips, Black, 4.9mm (Single Pair - Large)

I have bought 3 packs of these previously because I was very impressed with the shape, fit and durability but these new ones are not the same as the others. Which is why im giving these 2 stars instead of 1. If I had reviewd these a year ago it would have easily been a 5 star product.As soon as I openned them I noticed that these tips are not the same. They are just not as long as they used to be meaning that they dont fit as far into your ear canal resulting in poor isolation and a difference in sound. This may not seem like a big issue to some people but this is one of the reasons why I kept buying these tips over other cheaper brands. I mean let's face it these are not the cheapest tips on the market.I have compared these tips side by side with another batch I bought several months ago and yes there is a good 3mm difference in size. This might just be a bad batch and I seriously hope Dekoni are not sourcing there tips from another manufacturer. You can tell the difference between them by looking at the center tube. The old good quality ones have a black center but the new poor quality ones have a blue centre.If I can source some old stock Dekoni tips then I will definately buy them again but unfortunately I think I might have to look elsewhere for future purchases.

I bought the large size Mercury ear tips after watching a YouTube video that was sponsored by DEKONI. The main reason I bought the Mercury ear tips is that the Youtuber Aaron Is Loud and Wireless said they provide better noise cancellation than the Sony WF-1000XM4's stock ear tips.I spent 2 hours testing and comparing the noise isolation of the Mercury Bullet to Sony's default ear tips that come with the WF-1000XM4. Conclusion: The sony ear tips blocks more noise than the Mercury Bullet ear tips. With the Sony ear tips I can barely hear the fish pump that is bubbling water very loudly in my fish tank where as with the Mercury Bullet ear tips I can still hear the water bubbling. The Sony ear tips reduce the loud fish tank bubbling water noise by 98%. The Mercury bullet ear tips reduce the same noise by about 60%.The Mercury Bullet Ear tips also make a constant sticky static like sound when you squeeze the ear tips and let it expand in your ear. The sticky sound will stop when the Mercury Bullet ear tips have fully expanded inside your ears.Audio clarity is also reduced by at least 10% when using the Mercury Bullet ear tips, but that can be fixed by adjusting the EQ with a third party EQ app.In terms of blocking noise the default Sony ear tips that come with the WF-1000XM4 do a better job at blocking noise. I will add that the DOKONI Mercury Bullet ear tips do block considerably more noise than the Comply TrueGrip Pro ear tips (which I also have).I have not found any other ear tip that is able to block as much noise as the Sony ear tips that come with the WF-1000XM4. I will add that I found the DOKONI ear tips 100% better than my Comply TrueGrip Pro ear tips.

These are fine for what they are but they were a disappointment to me. First, they're too short (ie, not enough length on the foam) so the isolation was only so-so at best. Second, the foam itself is more like a foam mattress than the memory foam some competitors use, that compresses to a thin roll and slowly expands in your ear. These compress and expand basically immediately, you can't compress, insert and wait for them to expand. This made getting these deep into your ear with a good seal even harder. The result is that the IEM was robbed of bass, and the treble was sharpened by comparison, making these sound less pleasant as well. They're not bad, but they're just not good. Comply foam from one of their more isolating sizes will almost certainly be better. These will no doubt last longer, but - does that help when they're less fit for purpose?

If you find the foam ear tips supplied by Sony uncomfortable I highly recommended the Dekoni Mercury. The mercury foam tips are thicker and softer providing a better fit and better noise cancelling. The sound quality has improved and the bass is more punchier. Highly recommended..

I haven't had much time to listen to my IEMs with these tips fitted but so far they have proven quite comfortable and offer a pretty good sound. The were also easy to fit onto the IEMs' sound tubes. I ordered this particular mix of tips as I suspected each ear required a different size of tip, to keep the IEMs in place, and that is what I found: one ear requires a large tip and the other a medium tip. When eventually I have to replace these tips I now know that I will need to purchase two different sizes of tip (or another pack of the small, medium, large tips).