Linsoul NICEHCK NX7 MK4 4BA+2DD+ PZT Driver Hybrid IEM in-Ear Earphone with Detachable 2pin OCC and Silver-Plated Mixed Cable, Replaceable Tuning Filters for Audiophile (NX7 MK4, 4.4mm)

Wow these IEMs are amazing. Every sound is very detailed could hear things you wouldn’t normally hear with regular headphones. Enhanced clarity in my opinion. I would recommend.

The packaging is really nice and complete... They have a flat sound signature with highs that could be piercing sometimes, bass got better after a good 24h of burning in, they have a lot of detail and nice soundstage, mids are balanced and present... It's important to have a good amp DAC to get the most from them...After 1 month use this just keep to get better every day, the level of detail is awesome, if you're looking for a good, and very comfortable IEM on this price range, this one has to be a go to... Simply beautiful

First and foremost, the bass on this set is presented as well as or better than any of the 40 or so sets that I own. It’s definitely the most emphasized. So if you’re a bass head, look no further. There are 3 included tuning filters and I am talking about the gold one. The black took the bass up too far and muddled the rest of the tuning. And this set is very well tuned. The red puts emphasis on the upper mids and treble, but with the piezoelectric driver doing a lot of work, it’s got too much sizzle and spice for my tastes. The gold is balanced and it is a thing of beauty. It is certainly a V shaped tuning, but the mids are not too warm and they are present, if slightly recessed. Overall a very fun, decently technical iem with acceptable soundstage and resolution. But that is not what you’re looking for is it? You want bass, don’t you? Deep, impactful, satisfying bass. Yes, yes you do. Deep down it’s what we all want.So if you’re ready to admit that you love bass, then get ready for some fun with the NX7 mk4. I actually put its low end prowess up against my Kicker Comp C on a 400/800 rms amp in the back of my car. lol. The Nice HCK actually went LOWER. Nuff said.

Right ear went out after 3 months.