Hall Research HR-101 Mic and Line-Level Fiber Optic Audio Extender Kit

SKU: HRHR101 MFR: HR-101
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Key Features

  • Extend your audio reach with this fiber optic extender kit, perfect for pro audio setups.
  • Enjoy high-fidelity sound with a wide 3 Hz to 30 KHz bandwidth using this audio extender.
  • This Hall Research extender supports both mic and line-level inputs for versatile connectivity.
  • Durable aluminum and steel enclosure ensures long-lasting performance for your audio equipment.
  • Extend audio signals reliably up to long distances using multi-mode fiber optic cables.
  • Phantom power support ensures compatibility with a wide range of condenser microphones.
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Special Order?Estimated to Ship: 09/09/2025
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Hall Research HR-101 Specifications

  • Audio Inputs

    1x 3.5mm analog line level stereo, 1x XLR microphone

  • Audio Outputs

    1x 3.5mm stereo analog , 1x RCA SPDIF Digital

  • Mic In Impedance

    6.8kOhms

  • Mic Phantom Power

    15vDC (note that most mics rated for 48v accept range of 12-48 vDC, with some 9-52 vDC)

  • Mic Amplifier Noise

    1.3nV/Sq.root Hz RFI at 1KHz

  • Mic CMR

    100 dB min

  • Audio Bandwidth

    3 Hz to 30 KHz

  • Optical Wavelength

    840 nm GaAIAs LED

  • Optical Cable

    Simplex (only 1 fiber) Multi-Mode. OM2 or OM3

  • Operating Temperature

    32 to 122 deg. F / 0 to 50 deg. C

  • Storage Temperature

    -40 to 185 deg. F / -40 to 85 deg. C

  • Enclosure

    Aluminum and Steel

  • MTBF

    90,000 hours (calculated estimate)

  • Power

    5V DC, 2.6A (actual consumption less than 0.25A)

  • Dimensions (H x W x D)

    Sender: 1.64 x 4.18 x 5.08" / 4.17 x 10.62 x 12.90cm
    Receiver: 1.26 x 2.75 x 3.77" / 3.20 x 6.99 x 9.58cm

  • Weight

    Sender: 0.65lbs / 0.29kg
    Receiver: 0.34lbs / 0.15kg

About Hall Research HR-101

You can experience superior audio transmission with the HR-101 Mic and Line-Level Fiber Optic Audio Extender Kit, a professional-grade product from the trusted brand, Hall Research. This advanced kit consists of two robust components: a sender (HR-101-S) and a receiver (HR-101-R), designed to facilitate high-quality audio extension over long distances using fiber optic cables.

The HR-101-S is a compact, yet powerful microphone amplifier with a stereo line-level mix. It can function as a standalone device or be paired with the HR-101-R for enhanced audio transmission. This unit features a balanced mic input on an XLR connector and a stereo line level input on a 3.5mm mini-stereo jack, accommodating a wide variety of microphone types.

Equipped with an adjustable-gain low noise mic preamp, the HR-101-S offers a gain range of +34 to +54 db (or x50 to x500). This ensures optimal audio quality by preventing saturation and clipping due to excessive gain. A digital VU meter on the front panel provides a clear indication of volume levels.

The HR-101-S also offers the convenience of phantom power, which can be activated via a front panel switch. Its stereo line input, located on a standard 3.5mm (1/8 inch) connector, mixes seamlessly with the amplified microphone signal. This feature allows a presenter to connect their PC's audio to the line input and plug the mic into the XLR, resulting in a perfect blend of the speaker's voice with the PC audio.

For output, the HR-101-S provides both stereo analog (on 3.5mm) and SPDIF digital (on RCA) options, along with a fiber-optic ST connector for driving long cables up to 3,280 ft. to a compatible receiver.

The HR-101-R Receiver, the second component of this kit, features an ST fiber optic input connector to receive audio from the sender. It provides a stereo line level output on a 3.5mm mini-stereo jack and a SPDIF digital audio output on an RCA connector.

With the HR-101, you can extend audio over a single multi-mode fiber optic cable spanning distances of over 1000m (3280ft). For optimal performance, OM2 or OM3 cables are recommended for lengths up to 500 meters, and OM3 cable is suggested for distances over 500 meters. Experience the difference in audio transmission with the HR-101 Mic and Line-Level Fiber Optic Audio Extender Kit.

Hall Research HR-101 Features

  • MIC preamp input
  • Stereo line level audio input
  • Local analog stereo line level and digital SPDIF audio outputs
  • Adjustable gain for MIC preamp input
  • VU meter to indicate MIC preamp gain
  • Phantom power to accommodate a wide range of MIC inputs
  • Safety interlock does not turn on high-power fiber LED drivers unless fiber-optic cable is plugged in at both ends
  • Green design, turns off parts of circuit when they are not in use
  • Compact, Rugged, Reliable and Economical
  • Made in USA

Warranty Information

This product has a limited warranty of 36 months.

Key Features

  • Extend your audio reach with this fiber optic extender kit, perfect for pro audio setups.
  • Enjoy high-fidelity sound with a wide 3 Hz to 30 KHz bandwidth using this audio extender.
  • This Hall Research extender supports both mic and line-level inputs for versatile connectivity.
  • Durable aluminum and steel enclosure ensures long-lasting performance for your audio equipment.
  • Extend audio signals reliably up to long distances using multi-mode fiber optic cables.
  • Phantom power support ensures compatibility with a wide range of condenser microphones.

What's in the box:

  • Hall Research HR-101-S Sender
  • HR-101-R Receiver
  • Hall Research 3 Year Limited Warranty