FiiO FH1s specs: from 5Hz to 40KHz frequency response, 26 ohms impedance, 106dB sensitivity, 1 dynamic driver (13.6mm) + 1 BA driver (Knowles 33518), 1.2m cable length, 4.3g weight for a single earbud, in-ear type.
FiiO FH1s is a new Hybrid IEM Driver with one Knowles 33518 Balanced Armature Driver and one 13.6mm diameter dynamic driver which reduces unwanted resonances and gives the higher frequencies a sense of realism and "tactility" you can feel. With the combination of the armature driver and dynamic driver, this earphone can produce a High-Res sound and deep bass. The sound quality is impressive with clear mids, especially for high vocals and cymbals.
FiiO FH1s - soundWhen I heard about the release of FH1s and I saw it's using a 13.6mm dynamic driver, I said a big Uauuu. My thoughts linked it to FiiO FH7, but... my enthusiasm left fast when I find out that the dynamic driver is not made from beryllium. Yes, I know... it would be unrealistic to add a dynamic driver from expensive IEM to cheap earbuds... But don't be disappointed! There is an improvement. At least compared with FH1. I think that these earbuds are nothing less than FH1 with a bigger dynamic driver. In other words FH1s is approximate an FH1 with a better and deeper bass. Nothing more, because it's used the same Knowles 33518 BA driver for mid and high frequencies.
This FiiO FH1s features a unique celluloid panel with a three-dimensional faceplate with layer and a gorgeous color. It also has the new airflow balancing technology, that enables fastly different balances armature and dynamic drivers to work in coherence that brings the user an amazing reproduction of sound. FH1s also comes with 3.5mm-terminated cable made of monocrystalline copper core with 120 litz for better audio transmission performance under the naturally-occurring yet adverse skin effect. FH1s also have a brass vibration-damping ring and acoustic suspension system.
FiiO FH1s uses an ergonomic design that is made such that it resembles the shape of the human ear. If your ears will usually be tired and sore if you use the earphones for too long, the design of the FH1s earbuds makes users more comfortable when using them. Equipped with a balance pressure relief technology feature that reduces the level of ear fatigue, FH1s feels light, even when used for a long time. With a relatively affordable price, this one IEM is one of your best choices. Another unique feature is that users can easily change this FH1s mode.
The UTWS1 true wireless bluetooth module allows users to easily convert these earphones to a true wireless headsets in an instant. You can adjust the earphones as needed, no need to use various earphone models. For now, FH1s are designed in two colors. The gold-plated connectors, in addition to beautifying the appearance, serve to maintain at high levels the transmission of electric signals from your source of sound to these IEM.
Although made with various advantages and unique features, the FH1s still has a few shortcomings. Treble feels a little sharp and metallic is heard in several types of songs. This treble effect can feel different for each user because the sensitivity of each ear is different. If maybe later you feel your little problem, you has to adjust the EQ. Usually, some types of music that use unusual sound frequencies will require some settings when you listen through the earphones.
One more thing that needs to be considered is the comparison of earbuds size with ear size. Because earbuds use an average ear size, it seems to be uncomfortable if used by people with ear sizes that are larger or smaller than the factory standard. Some people have big ears and earbuds will feel loose when used. There are also users with small ears so that earbuds will feel tight when installed in the ear. So, if you want to buy earbuds you should consider the size and shape of your ear.
Also, what I don't like is the price of FH1s compared with the old FiiO FH1. I understand that the main differences between FH1s and FH1 are a bigger dynamic driver and the construction material for the case, but it doesn't justify that FH1s has to be with approximate 50% more expensive. The good side is that FH1s is still cheap and many people can afford to buy this pair of IEM. Anyway, before ordering FH1s, you should take a look at FiiO FA1, that is sold for a similar price (but it doesn't have a 13.6mm dynamic driver - it means a little less amount and quality of bass, because FA1 doesn't have a dedicated dynamic driver for low frequencies - but it's frequency range starts from 20Hz, FA1 reproduces a natural sound).