Wireless Headphones

Sony MDR-RF975RK

Sony MDR-RF975RK
MDR-RF975RK


MDRRF975RK Description:

Sony's MDR-RF975RK 900 MHz RF Wireless Headphone System lets you move inside and outside your house and still enjoy music and TV sound, and lets you turn up the volume late at night without disturbing others. The MDR-RF975RK features a comfortable closed Circumaural Headphone, easy rechargeable battery system, noise reduction transmission system to reduce extraneous noises and AFM transmission system to resist static and distortion for higher fidelity. Mute Function helps eliminate noise through the headphones and cuts out the sound when no audio signal is available. 30mm Diameter Driver Units are larger than many portable headphones for deeper bass, lower distortion and wider dynamic range; low frequency response extends down to 20Hz. PET diaphragms ensure high rigidity for minimum distortion, and low mass brings out excellent high-frequency response. Comfortable Closed Circumaural Headphones fit securely for maximum frequency response reception and the double headband with self-adjusting mechanism conforms to the curve of your head for a fit that stays comfortable even during extended listening sessions. Noise Reduction transmission System eliminates most of the static noise. Built-in Rechargeable Ni-MH Batteries are more convenient than ordinary replaceable batteries, and when fully charged provide hours of operating power, easy Rechargeable Battery System automatically charges the headphones when placed onto the transmitter. 3 Transmission Channels Available help ensure optimum signal reception; convenient tuning control on headphones. Automatic Power On/Off for both headphones and transmitter conserves battery life; transmitter turns on when it senses an input signal; headphones turn on when you place them on your head. AFM Transmission System resists static and distortion for higher fidelity; convenient sliding selector control on the side of the transmitter. Automatic Tuning is implemented on the Sony MDR-RF975RK Headphones for best reception of signal.


Sony MDR-RF975RK Features:

  • Noise reduction system to minimize hiss noise and interference
  • 900MHz radio frequency transmission for higher sound quality and range
  • 150 foot transmission range
  • Automatic tuning for best reception of signal
  • Closed headphone for minimal ambient noise distraction
  • Mute function, volume control
  • PET diaphragms for minimum distortion
  • Ferrite magnet
  • 3 transmission channels
  • 30mm drive units for deeper bass
  • AFM transmission system
  • Automatic on/off
  • Self-adjusting double headband
  • Easy connection to home audio, TV or VCR
  • 20Hz - 20kHz
  • SONY MDR-RF975RK operate with supplied NiCd batteries or 2 AA batteries



View Owner's Manual for MDR-RF975RK (Adobe Reader Required)


MDR-RF975RK
Technical Specifications:
  • Wireless Design lets you move inside and outside your house and still enjoy music and TV sound, and lets you turn up the volume late at night without disturbing others
  • 150 Foot Transmission Range for listening enjoyment upstairs, downstairs, virtually everywhere in your home and outside in your backyard
  • 900 MHz Radio Frequency (RF) Transmission provides better sound quality and greater range than earlier wireless systems, and uses the same advanced technology as 900MHz cordless telephones
  • Mute Function helps eliminate noise through the headphones and cuts out the sound when no audio signal is available
  • 30mm Diameter Driver Units are larger than many portable headphones for deeper bass, lower distortion and wider dynamic range; low frequency response extends down to 18Hz
  • PET diaphragms ensure high rigidity for
  • Neodymium Magnets pack more magnetic energy per ounce than conventional ferrite, samarium cobalt or aluminum magnets and produce powerful bass and clear treble sound
  • Comfortable Closed Circumaural Headphones positions the drive units at correct distance from the ear canal and creates a sealed resonance chamber for superb deep bass; follows the natural shape of the human ear for greater comfort
  • Noise Reduction Transmission System is designed to reduce extraneous noise and hiss and allow the headphones to receive the signal more clearly
  • Double Headband self-adjusting mechanism conforms to the curve of your head for a fit that stays comfortable even during extended listening sessions
  • Single Volume Control in one earpiece conveniently adjusts volume for both stereo channels
  • Built-in Rechargeable Ni-MH Batteries are more convenient than ordinary replaceable batteries, and when fully charged provide up to 25 hours of operating power
  • Easy Rechargeable Battery System automatically charges the headphones when placed onto the transmitter
  • 3 Transmission Channels Available helps ensure optimum signal reception; convenient sliding selector control on the side of the transmitter
  • Automatic Power On/Off for both headphones and transmitter conserves battery life; transmitter turns on when it senses an input signal; headphones turn on when you place them on your head
  • AFM Transmission System resists static and distortion for higher fidelity
  • Automatic Tuning on Headphones for best reception of signal
  • Complete Kit supplied, includes transmitter, headphones, connecting cord, UniMatch® plug adapter and AC power supply
  • Supplied Connecting Cord goes directly to headphone output of your high fidelity system for easy connection to hi-fi system, TV or VCR
  • RF Modulation: Frequency modulation
  • RF Carrier Frequencies: Channel 1: 913.5 MHz, Channel 2: 914.0 MHz, Channel 3: 914.5 MHz
  • Effective Range: 150 feet

  • Transmitter:
  • Power Requirements: AC 120Vm 60Hz when used with supplied AC power adapter which connects to the DC 9V jack
  • Audio Input: Stereo L/R phono jacks, Supplied 3 ft. connecting cord goes from stereo mini plug toL/R phono plugs, Supplied UniMatch plug adapter converts stereo mini plug to stereo phono plug
  • Headphones:
  • Type: Closed, dynamic, wireless
  • Driver Unit: 30mm diameter, dome type
  • Diaphragm: PET
  • Magnet: Neodymium
  • Headband: Double band, self-adjusting
  • Frequency Response: 18-22,000Hz
  • Power Requirements: Headphones: DC 3V, Sony Ni-MH battery (built-in), Transmitter: 9V AC with supplied adapter
  • Battery Life Approx: 25 hours with fully charged Ni-MH battery (built-in)
  • Sensitivity: 105 dB/mW
  • Impedance: 24 ohms at 1 kHz
  • Tuning: Automatic
  • Volume: Rotary control
  • Power Handling Capacity: 1000mW (IEC)
  • Weight: Headphones: 12 1/4 oz (350g) w/battery, Transmitter: 7 oz (200g)
  • Dimensions(WxHxD): Transmitter: 5 1/8" x 5 5/16" x 6" (130 x 135 x 150cm)
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