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Sennheiser HDR 170

Extra headset for RS 170 wireless headphone system

5 Reviews

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Item # 143HDR170

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Our take on the Sennheiser HDR 170

Add an extra HDR 170 headset (or even two or three) to your Sennheiser RS 170 wireless headphone system and share the fun. Its closed-back, over-the-ear design helps reduce outside noise and prevent sound leakage, while Kleer® wireless technology serves up uncompressed audio that rivals wired headphone performance. Soft leatherette earpads and headband cushions make it comfortable to wear for hours.

The HDR 180s and 170s are my go to wireless headphones. The 170s are better for when I want to block everything out, the 180s are a bit more comfortable but have sound leakage and do not noise cancel (which is a pro and a con depending on environment).

Navy Vet, New Jersey

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What's in the Box:

  • HDR-170 Wireless over-ear headset
  • 2 "AAA" Rechargeable Ni-MH batteries (1.2V/750 mAh)
  • Quick guide (English/ French/ Spanish/ Portuguese/ German/ Italian/ Dutch/ Japanese/ Russian/ Polish/ Turkish/ Simplified Chinese/ Traditional Chinese/ Korean/ Indonesian)

Product Highlights:

  • add-on headset for use only with Sennheiser's RS 170 wireless headphone system (sold separately)
  • up to four headsets can be used with a single transmitter
  • RF wireless receiving range: up to 260 feet
  • Kleer uncompressed audio transmission for interference-free reception and high-fidelity sound
  • power on/off and volume control on headset
  • automatic pairing to transmitter for hassle-free operation
  • frequency response: 18-21,000 Hz
  • headphones use 2 "AAA" NiMH rechargeable batteries (included)
  • requires transmitter/base-station from RS 170 system for use
  • weight: 7.6 oz. (without batteries)
  • warranty: 2 years
  • Our 60-day money-back guarantee

Sennheiser HDR 170 Reviews

Average Customer Review(s):

(5 Reviews)
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Hands-on research

Product Research


Overview: The HDR 170 is an additional (or replacement) headset for the Sennheiser RS 170 wireless headphone system (item number 143RS170, sold separately). The closed back, over-ear design helps keep external noise out.

Kleer Wireless Transmission Technology: The RS 170 headphone system features the digital wireless audio transmission technology from Kleer. Kleer technology transmits uncompressed audio up to 260 feet over a 2.4 GHz digital link (2.4-2.8GHz), enabling you to enjoy your music without the hassle of cables. Kleer's uncompressed digital wireless transmission delivers CD-quality sound.

Note: Kleer technology will not interfere with wireless networks or other 2.4 GHz devices.

Batteries: Power for the headset is provided by two rechargeable Ni-MH "AAA" batteries (included) that fit into compartments in the headset. The batteries are recharged using the charger included with the RS 170 system. Fully charged batteries have an operating time of approximately 24 hours and require approximately 16 hours to recharge.

Bass Boost & Surround Sound: The HDR 170 features selectable Dynamic Bass Boost to deliver deep bass response. It also features selectable Surround Sound simulation for a private movie theater experience.

Auto Power Off: If there is no signal from the transmitter for more than 5 minutes, the headphones automatically switch to standby mode.

Controls (on the right earcup):

  • Volume: volume up/down
  • Multi-Function: turn the headphones on/off, set to multi-user operation, mute, and associate with the transmitter
  • Surround: activate/deactivate 3D surround sound
  • Bass: activate/deactivate the dynamic bass boost function


  • Reception Frequency: 2.4-2.48 GHz
  • Modulation: MSK Digital
  • Frequency Response: 18-21,000 Hz
  • Maximum SPL: 110 dB
  • Weight: 7.6 oz (without batteries)

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