FiiOFD11 Earphones High Performance Dynamic Driver IEMs Earbuds with Deep Bass 0.78mm Detachable Cable 3.5mm Plug in Ear Headphones for Musician Singer Music (Silver)

These are excellent dynamic driver IEMs, and their bass is indeed well supported but doesn't wipe out the mids or treble in the process. With a good fit and seal, this is an audio-experience that is straight up exceptional. Their weight and solidity make for an excellent platform and they may be the best sounding IEMs I own.The only real issue with them comes back to that weight -- it's hard to fit them and *get* that good consistent seal, and they slip out of the ear on a dime. Thanks to the earhook design losing them isn't a risk, but they're not designed to 'fall back' to an open ear design so the sound just gets weird when that happens. I've tried multiple sizes of eartip, as well as both silicone and memory foam both from FIIO and third party, and so far nothing's solved that issue. It's not enough for me to deduct a star... which should say something about how solid the sound of these buds are. They're worth figuring out the fit issue.

Comfortable and met expectations

Wow, what a great IEM for the money! The build quality is excellent. I recommend trying several types of ear tips to get the best fit for you. These are fairly heavy so using the correct tips to get an excellent seal in the ear canal is a much. They sound really good; excellent bass that extends deep and can get punchy when the music calls for it, very good mid range and excellent highs. They are fun to listen to. The cable is good quality too although I wish Fiio would offer a balanced cable option. I love Fiio products but have not been impressed with their IEM products until the FD11. It's a great value and a must for your IEM collection!

Pros: Exceptional build quality. These feel solid and hefty! And because it's FIIO the audio quality surpasses expectations.Cons: These are hefty. Getting a good seal can be tricky and I have felt these earbuds slip out every now and then. Audio quality is great but it also may need some finessing with your EQ, in my opinion these are a bit treble heavy but every situation and set of ears are different.

These are a comfortable set of iem's, but do feel like they will fall out easily. I was not able to get a good fit with m mine or thier normal medium or large tips. I am returning these for a poor fit but I still gave my option on the sound. The stock cable is better than I have seen from most iem's under $50.As for the sound, These leans slightly toward analytical in tone. The bass is there and not stepping on the mids, the bass has some nice thump on some tracks, feels clean to me. The mids, for my taste I find a little to forward and some tracks it can become shouty. The highs are to my liking, they show control, they are nice with sparkle and not too fatiguing. But the shouty mids was not something I could get used to or want to.I go these on a deal of 25% off and glad a grab them. These are a good deal, and can be powered on any simple dongle. I tried these on a iFi Go Link and I do not have to raise my volume over 65 out of a 150, at 75 these are screaming.... loud.

Poor quality speaker shell. Never abused (even when banging my head against the wall) but they just fell apart one day when I pulled them out of my ear. Gorilla glue didn't last. I guess the plastic is glue-phobic. While I do like FIIO generally, I cannot recommend these buds.

Admittedly i purchased after watching Zeos review. I have a bunch of the other IEMs in the price bracket. These are my favorite. The tuning is perfect for me. Honestly the price is worth the cable alone. i love the angled connectors instead of straight connectors. These fit my ears/head so perfectly and they are very comfortable. Also, these seem to me they are very easy to tune with different tips. My favorite for music so far is the Render tips really improve bass and mids. But i use Sednafit Crystal earbud tips (made for true wireless iems) for less ear canal fatigue when using for voice calls and podcasts. The nozzle has a ridge to secure all size tips. even those TW IEMS. Great stuff, FIIO.

After ~2 months, and light usage (5 or fewer uses per week & 30-45min at a time) ... the right earphone/speaker quit working.It will put out some sound, but only a a level to listen to if the left earphone is at a very high volume!(I see in the paper user guide that the warranty is apparently only 1 month.)>>>I edited this review to change from 1-star to 3-stars (probably would be 4-stars, except having to deal with the noted failure), now changed to 2-stars due to an additional failure!<<< ;After I contacted the manufacturer, they offered to send me a replacement right earphone if I paid $5 for shipping. I received the replacement promptly & it was working well.The left-hand earpiece failed not long after recieved the new right-hand earpiece (probably only a month or less).I've now purchased a set of "NICE HCK" F1 Pro IEMs that seem to be better quality all-around.