final A4000 Single-Driver IEM Earphones, High-Fidelity Sound, Detachable Cable, Lightweight in-Ear Monitors, Premium Audio Quality, Comfortable Fit, Durable Design, Ideal for Audiophiles

I ordered these based on a couple of YouTube reviews, none of which brought up a frequency response graph. I wanted a taste of what good soundstage sounds like from an IEM without spending big money, so I got them.They immediately sounded like they had a V-shaped signature, and while I don't typically aim for that sound signature, I had no problem with these.Treble:I liked these much more than my OH10s because while the frequency response graphs show a huge hump in the upper mids/treble for the A4000s, the OH10s sound much sharper. The A4000s certainly don't lack detail, but they come across as much smoother. If I had looked at the frequency response of the treble before buying these, I would not have bought them.Mids:They exist, just a little thin.Bass:This was the most surprising aspect of the sound for me. I wasn't expecting much coming from solid metal IEMs like the OH10s, Arias, and Tin T2s, but the bass is punchy, smooth, and round (in a pleasing way). It doesn't sound particularly fast, but it has great tonality. The sub-bass is slightly forward, but the mid-bass tapers well into the mids.Soundstage/imagingJust like everybody else says, very good. I don't have much else to say other than that it feels like the A4000s push everything away. It rarely feels intimate, even when it feels like it should. I've heard their more expensive model can do both intimacy and width, whereas it feels like these focus purely on width.Something to note is that I like to bring these to the gym because of 1, the comfort and fit; and 2, they scale extremely well with volume; they never sound crowded, the bass hits hard, and the treble never becomes too sharp. That being said, the filter on my right bud got soiled from what I am assuming was sweat, but after a couple days of drying, it appears that the filter is back to normal.I really began to appreciate this product after looking at the frequency response graph on Crinacle's website. While the mids are most definitely recessed, the graph tracks extremely well with the target between 500-2k after which the hump begins. The treble hump encroaches a little bit on the upper mids which leads to the mids sounding a little thin in general, but they avoided making any mistakes in the gain region and so vocals still generally sound natural enough. The treble is emphasized, but even, and returns back to the target after 10k which prevents them from sounding too sharp.I don't know why they don't sound sharp, but it's pretty cool. If I ever go into kilobuck range, the A8000 is definitely one of the options I'm looking at.

The Final A4000 has a neutral tonality with the upper end leaning bright. The low end is fast and punchy, slightly recessed. Comfort is on par with similarly priced iems and the included ear hooks were nice but I ended up removing them.The soundstage - it’s good, made much better with foam tips to get the best out of them. The Joshua Valour review isn’t necessarily overhyped but you should try a few different tips to maximize the sound according to your preference. The A4000 excels at instrument separation and has a very enjoyable tonality.Coming from a Tin T4, I prefer the tonality of the A4000. The midrange is more open and it seems to be more clear in general. I will note that the upper frequencies are elevated, not painfully sibilant, but right on the edge of unnatural.The cable does not have microphonic issues but feels cheap nonetheless. I’ve heard they don’t fit all 2 pin cables since there is a notch in the housing.READ ALL THE WAY FOR UPDATE:One issue with my specific pair - the left channel distorts/chatters noticeably around 50-60hz at higher volumes. Does not disturb the listening experience but as a snobby nerd it does bug me every then! May return to get another pair that passed the QC with flying colors. ;)UPDATE: Final swapped my pair for a new, and they sound perfectly balanced L/R.Bottom line - if you are looking for your first IEM or are adding to your Chifi collection, this is a great one.

I got these originally for playin games like cod etc... and man do they really work well for directional audio alittle bright leaning wich is expected but everythings still there the low rumb and thump in the bass all present regardelss of volume... these things make it incredibly easy to hear a bad recording as they are very detailed sounding in the mids and highs aswell. The fit for me was perfect as i have small ear canals and needed something with a smaller nozzle these were just what i had been looking for. Light weight no visible wear after lots of use and a phenomenal soundstage if your in the market for some great iem's withouth breaking the bank i wouldnt hesitate on trying these out.!!!!

Final Audio utilized design features from their $2,000 A8000 IEM in creating the A4000. Perhaps because of this, the A4000 sounds vastly better than you would expect for $159. The soundstage is remarkably wide, imaging is clear and highly detailed, and tonality is natural. The sound is warm with an exceptional midrange and good bass response. These sound to me like they could cost $1,000. Probably the best deal you can get for affordable IEM, especially if you like the sound signature. (I am using using these with an Audioquest Dragonfly Cobalt DAC/amp, and the Dragonfly significantly improves the performance of the A4000. I highly recommend the combination; it sounds stunning).

This iem make my air pod pros sound muffle. At first the highs was a little bit much for me but after 20 minutes I got used to it. Switching back to my AirPods pros is impossible. The sound stage and the clarity is simply miles ahead. I'm very very very glad I gave this a try!

Got it today. Tested with 4.4mm balanced cableLinsoul Tripowin Zonie 16 Core Silver Plated Cable SPC Earphone Cable for BL03 TRN V90 V80 AS10 ZS10 ZS6 ES4 ZST ZSR iems(2pin 0.78-4.4mm, Grey) https://www.amazon.com/dp/B07ZQBBCW7/ref=cm_sw_r_cp_api_glt_fabc_C70FSWYTMQ8H10BC31HH?psc=1Sounds super great, details, clear & wide soundstage along with enough bass & noise cancellation.Listening with Fiio Q3 & Topping A50s

Absolutely incredible for gaming but a little thin sounding for music. Treble is pretty crazy but you can eq it down. Imaging is pretty damn good in cod. Very precise. For music there are better options in this price range but still no slouch in terms of technicalities.