Description
Penon OS133 OFC Silver-plated Audiophile IEM Cable
OFC silver-plated wire
Black nylon cover
2 shares , single share contains 133 cores , a total of 266 cores
MMCX connector
2Pin 0.78 mm connector (positive and negative concave grooves facing outward)
QDC connector (positive and negative L, R characters facing outward)
Gold-plated copper + carbon fiber plug accessories
gold-plated plug
1.2m length












Gregory –
the OS133 is an improvement in accessible natural sound by altering the sound to becoming slightly clearer and spacious. You can kind-of hear more into the stage, like the instruments have become spread apart in both right to left and subtly front to back. Though after time much of those contrasts go away as you adapt and take the sound for granted, the next level is instrument filagree. Meaning due to clarity there are ever so slightly different details which can emerge, which go and show simply that there is more definition to the signal.
https://www.head-fi.org/showcase/penon-os133-iem-cables.25829/reviews#review-28806
Dsnuts –
The OS133 is a great little cable, It doesn’t neuter any of your sound details and traits of your earphone if anything it will enhance them adding a moderate stage and space element. They enhance a natural tonal character, supporting a bit more the bass and mids qualities with a clean treble. The OS133 is a suburb tool like a clean window to view your sound, especially in balanced form. Earphones with a bit leaner mid range and bass will do well with the OS133. Earphones needing a bit of stage and space enhancement will do well with the OS133.
https://www.head-fi.org/showcase/penon-os133-iem-cables.25829/
Redcarmoose –
Somehow the ISN H40 really was in need of what the OS133 brought to the table? Here the treble was not only expanded but showed a kind-of tidy-up effect. The silverware was polished for the new guests, so to speak. It’s not night and day or anything, it’s just that everything finally adds up. The quality of the song file, the DAP or amplifier, the cable and the monitor and tips……….they all play a part in the final results. Often cables will not go to show a quantifiable improvement and offer a side stance. This results from no single personality change affecting instruments, except that there has been a moving, a repositioning of musical elements inside the soundstage. Also there is always a chance that the listener will find that connection. Such a musical connection can happen with how a cable goes to highlight a particular sound character. These characters are not only tone, but 3D imaging thus realism of playback inside the soundstage. This connection arrives as a kind of recognition of instruments. Where due to realism, the instrument is brought into special focus which results in a style of profound clarity. It’s as if the instrument is somehow closer and of better relief to behold it’s true tonal-timbral character. Such examples of cable improvement are possible…….and that to an extent took place here.
https://www.head-fi.org/showcase/penon-os133-iem-cables.25829/reviews#review-28806