Reviews by kochiyadragons

     Now, I own Sony MDR-EX800ST, Etymotic Research ER-4S, and Ultimate Ears Triple fi. 10PRO as daily use IEM. But still SE425 is my all time favorite for its accurate relaxing sound. I am a guy who always like to have music. I need music for walking, working, reading and forget about daily life. This is open like canal earphone. Sound is not too closed, bass is weak but deep, treble is transparent and relaxing. 
 
     I believe this SE425 has the best cost performance as your life partner through my 6 years of experience with this IEM. Of course, if you can afford over 300$, that is different story, but I know not many people can really dare to pay that much from their very first time to start expensive IEM. SE425 will be the good start for the wonderful audiophile world for who has first try high end model, and it will be the great reference IEM for all audiophile too.
 
     Ultimate Ears Reference or Reference Remastered have slimier sound tendency. They are all flat, accurate, and boring (with not negative meaning) . SE425 is just like them. It has typical referential sound with easy, and highly qualified beautiful mid sound. Probably I should paraphrase boring as relaxing or referential sound. I have learned a lot through this IEM about the sound of music itself. This honest IEM told me how quality of the audio source affect to my listening experience and overall satisfactions. This is the great IEM overall.
 
     I will still update in later when I get good word to describe this my favourite item.

     To sum up, this is my another favorite beside Shure SE425 (my main IEM for 6 years) I have purchased this IEM at Yodobashi Camera by 18000 Japanese yen (about 160$ at the time) This is the top of the mountain of the sony dynamic in-ear. MDR-EX1000 are more spacial and musical in compare to this IEM, and EX600 (discontinued) is somehow bassy and entertaining.
 
     The sound is very relaxing, but tight at the same time. I know it is contradictory. The mid-stage sound is very dynamic but delicate, and it never get you tired to listen music. Musical but referential. This is the only IEM I have ever know IEM with sound accuracy without exhaustion. If I say ER-4S as the de facto standard sound for the single BA IEM, this is the de facto natural sound for dynamic IEM. This is the IEM for who need to listen very detail of the music for their work. This IEM is designed by Sony for music creator, so package is completely white without ornament. This is not even a consumer product but for professional users. Bass is mediocre amount, but quality of the bass is awesome. It is powerful bass, but not exhausting. The best sound range is the mid. I could even visually see every single of sound particle when I listen through this IEM. Treble is very transparent and delicate. Overall, it is high quality monitoring IEM for reasonable price. I strongly believe 18000 yen is too cheap for its sound and build quality. 
 
    However, isolation is very terrible. You can still use comply by reversing its side (sounds just weird, but I have learned it from friend of mine who is also audiophile) if you like to use it at outside. 
 
     The cable connector is Sony's own standard, so not compatible with other company's IEM. I also found this IEM changes its sound when I replace the cable to EX1000's one. Somehow gives more detail and space for its sound.

This is very short and quick review. Hope I can update it when I have time.
This is my standard cable to check audio source quality. Very accurate as well as close to my tympanum when I insert my ear like my Shure IEM (over the ear not straight down). Cord over the ear also offered me listening experience without touch noise. Now I am considering to re-cable it for balanced cable. Have not yet try ER-4SR, so I cannot compare them.