Signature Acoustics ™ (SA) introduces RIVER (Elements Fe-One), India’s one-of-a-kind modular earphone usable in both wired and Bluetooth* configuration designed.

Each side of RIVER Fe-One has two drivers that use hybrid technology, including a front balanced armature driver and a rear dynamic driver.

While the front Balanced Armature driver produces high fidelity sound in mid and high frequencies efficiently, the rear dynamic driver produces clean and punchy bass. They jam together to produce a staggeringly addictive audio experience.

This fine spatial sonic experience has a dynamic range of combined bandwidth starting as low as 17 Hz and leading all the way up to 22 kHz. This full spectrum of crisp, engaging, and entertaining sound mesmerizes the listener. It also comes integrated with a high sensitive microphone with passive noise reduction, in its wired mode, or an active noise reduction, with its optional Bluetooth* mode, built right into its chipset.

This perfect harmony of elements creates remarkable immersive aural experience that builds on the legacy of Signature Acoustics® Fe-One series hybrid earphone, RAVEN and OCEAN.

SA RIVER Fe-One is literally overflowing with distinguishing features like:

  • RIVER has modular design, which makes it customizable by additional components from Signature Acoustics®. They have been designed and tested to enhance sound quality, durability, and comfort. Be sure to check out RIVER compatible optional accessories mentioned below.
  • Each channel of RIVER features one dynamic driver and one balanced armature. A total of four drivers in each earphone.
  • RIVER is suited for all genre including classical, rock, blues, and jazz
  • Stereo cables with Microphone comes as standard on 3.5 mm pin.
  • A genuine audiophile grade product with astounding sound.

Get prepared to be mesmerized!!


  • Driver Unit (each ear): 1 Balanced Armature + 1 Dynamic Driver
  • Net Weight: 25 gm
  • Cable Length: 1.2 meters
  • Plug Type: 3.5 mm
  • Pin Type: 0.78 mm 2 pin
  • Frequency: 17 – 22 KHz
  • Impedance: 25.5 Ohm
  • Sensitivity: 101.8 dB

Signature Acoustics ™ (SA) recommends Optional Accessories with RIVER for enhanced experience

*SA Bluelink – This modular accessory enables SA River to be fully Bluetooth 5.0 compatible

The IPX 5 waterproof & dust-proof Bluetooth 5.0 cable (separate accessory) weighs just 13 grams and have a 150 mAH battery that’s expected to last for an incredible 15 hours (We’re still testing different prototypes as of now). It features the most advanced flagship QCC3034 chipset and supports aptX, aptXHD, aptX Low Latency, CVC, SBC and AAC.

**SA Pure Stereo cables – This cable accessory replaces the standard mic with a more fuller and louder cable connection with least electrical noise, for pure audiophile

***SA PRODAC – It includes two sets of adapter. One 3.5mm (female) to USB-C (male) adapter with 70 mm flex cable;  One USB-A with optional USB-C (female) port


Users can choose a style of cable that best complements their taste and lifestyle. You can further add SA River pure stereo cables**