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Sony MDR-RF925RK

900 MHz wireless headphones

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  • Sony MDR-RF925RK

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Item #: 158MDRF925
 

Review Summary

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Our take on the Sony MDR-RF925RK

by Ralph Graves
Sony

Headphones: Great sound whenever and wherever

The right pair of headphones can solve a number of problems: listen to music and movies at night without keeping your family awake, take your favorite music with you while jogging or doing yard work, or get relief from distracting noise while working or traveling. Replace the cheap eabuds that came with your portable player with a high-quality pair, and discover more detail in your music. Or choose a set of full-sized 'phones for rocking out at home. Noise-canceling models use built-in microphones to pick up background sound and then cancel it out electronically.

The Sony MDR-RF925RK wireless headphones let you enjoy great sound from your audio/video system just about anywhere in your home, without disturbing your housemates. The headset's storage cradle has a built-in wireless transmitter with a range of up to 150 feet. The headphones feature soft padding so you can listen comfortably for hours. And high-quality 40mm drivers deliver clear, full sound.

The provided rechargeable battery pack gives you up to 18 hours of operation, and automatically refreshes its charge when the headset's placed on the storage cradle. You can also power the headset with two "AAA" batteries (not included).

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Highlights:

  • self-adjusting double headband with built-in auto power on/off sensor
  • over-the-ear design
  • 900 MHz RF (radio frequency) wireless transmission
  • 40mm drivers
  • manual tuning on headset
  • rotary volume control
  • selectable 3-channel transmission
  • listening range: up to 150 feet
  • up to 18 hours operation using the supplied NiMH rechargeable battery pack; up to 20 hours with two "AAA" batteries (not included)
  • transmitter/storage stand charges the headset's included batteries
  • AC adapter
  • headset weight: 10.59 oz.
  • transmitter dimensions: 8-3/8"W x 4-1/16"H x 4-15/16"D
  • warranty: 1 year parts, 90 days labor
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Style
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Frequency Response
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Sensitivity
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Impedance
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Weight
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Airline Adapter Included
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iPod Control
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In-line Mic For Cell Phone
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Built-in Microphone
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Parts Warranty
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Labor Warranty
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Product Research
What's in the box?

Download owner's manual

  • 900 MHz RF wireless headphones
  • TMR-RF925R RF stereo transmitter
  • AC-S1202S AC power adapter with attached 6' cord (12V DC/200mA)
  • Rechargeable nickel-metal hydride battery pack (2.4V/550mAh)
  • 42" Audio connecting cord (has left and right RCA audio connectors on one end and a minijack stereo connector on the other end)
  • Operating Instructions (English/French/Spanish)
  • US Warranty sheet
  • Canadian warranty card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections
Specifications

Features

Transmitter: The system comes with an RF transmitter that connects to an audio source via a minijack or left and right RCA audio jacks. The transmitter sends a 900 MHz signal to the headset, using one of three selectable transmission channels. The transmitter has an automatic On/Off function. The transmitter switches on and begins transmitting when it detects an audio signal, and will switch off if it detects no audio signal for 10 minutes. The transmitter also functions as a storage stand/charger for the headset when not in use.

Headset: The ear cups fit comfortably over your ears with a closed circumaural design that follows the ear's natural shape. The double headband's self-adjusting mechanism conforms to the curve of your head for a comfortable fit. The right ear cup has the volume dial and tuning switch, while the left ear cup houses the supplied rechargeable batteries. The headset has contacts that allow the installed battery pack to be recharged when the headset is placed on the transmitter.

Auto Power On/Off: The headset has a self-adjusting double headband with a built-in auto power on/off sensor. The headset automatically turns on when pressure is detected on the headband and turns off when no pressure is present.

Induction Charging: The transmitter charges the wireless headset through induction charging which requires no direct pin contact making connection simple.

NiMH Rechargeable Batteries: Power for the headset is provided by a rechargeable NiMH battery pack, giving you approximately 18 hours of use when fully charged. The supplied battery pack will need to be charged for 16 hours before initial use. 

Note: The headset can use the supplied rechargeable battery pack, or commercially available "AAA" alkaline batteries. The headset is not compatible with any other model of rechargeable batteries.

Range: Depending on conditions, the headset has a maximum range of 150 feet.

Controls

Back Panel of Transmitter:

  • Channel Switch: allows you to select transmission channel 1, 2, or 3

Headset:

  • Volume Control Dial: allows you to adjust the volume of the headset
  • Tuning Switch: allows you to tune the headset for the clearest reception

Connections

Back Panel of Transmitter:

  • Input A: stereo 3.5mm minijack
  • Input B: left and right RCA audio jacks
  • DC Input: for use with supplied AC adapter

Specifications

Specifications:

  • Carrier Frequency (3-Channel): 915.5 MHz, 916.0 MHz, 916.5 MHz
  • Modulation: FM stereo
  • Frequency Response: 20-20,000 Hz
 
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Sony MDR-RF925RK Reviews

Average Customer Review:

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3 out of 5

Sony MDR-RF925K

Written By Ron, Indianapolis, IN. on Thursday, April 17, 2014
 
I've used the Sony MDR-RF925 wireless headset for over two years now and the most accurate description of my findings was previous written by an audio reviewer on January 25, 2009. The position of the headphones on the wearer in critical in relation to where the transmitter is; loss of audio or clicking noises will result when the relationship between the transmitter and receiver is compromised. I will say they do sound great but when the transmitter and receiver are out of sync the clicking noise and loss of audio can be annoying. Because of this issue I can only give this product a 3 out of 5.
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1 out of 5

Bad Bad, Bad

Written By Bob F, El Granada California on Friday, January 14, 2011
 
Constant noise with audio in and out unless in same room with base ans even then
it happens every 5 or 6 minutes.
2 out of 3 people found this helpful
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5 out of 5

Great product, exactly as expected

Written By Anonymous, New Lenox, IL on Monday, September 21, 2009
Crutchfield Customer Review (What's this?)
 
This product was great, it delivered exactly what was expected with 1 exception. We needed to go buy a $6 adapter to plug the headphones into our receiver. Not a big deal & still cheaper than the next model up. My husband likes to watch movies or football after I go to bed - this product allows him to do that & me to sleep! Crutchfield was wonderful in helping steer me in the right direction for the adapter as well.
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3 out of 5

Sony MDR-RF925RK

Written By Jester, Gorham, Maine on Sunday, January 25, 2009
Crutchfield Customer Review (What's this?)
 
I have three sets of these Sony 900 MHz headphones, and they all have the same problem... The position of the headphone on the wearer, relative to the stationary transmitter is somewhat critical, in that there are situations where I turn my head away from the transmitter and experience a momentary loss of audio. Also, Sony's choice of 900 MHz is a poor compromise in terms of interference by outside sources. I've tried all three channels and have the same problem with all three. For the most part, these 900 MHz headphones are okay, but the loss of signal and interference will only allow me to give a score of 3 out of 5.
7 out of 7 people found this helpful
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4 out of 5

Quality sound, questionable fit/finish

Written By Scott, Dayton, Ohio on Monday, January 21, 2008
Crutchfield Customer Review (What's this?)
 
Purchased the MDR-RF925R model (not sure what the 'K' suffix signifies on this one) about a month ago. Setup was easy. From box to enjoying Seinfeld privately took about 15 minutes (I tested them before allowing them to fully charge). Sound quality is very good. Reception - even from a room or two away - is quite good, as well. Only problem we're having is that the rechargeable battery cover won't stay in place. This doesn't affect the use of them, but it's annoying.

There are obviously better (i.e. more expensive) examples to buy. But, if you're on a budget, these work well for the money.
100 out of 111 people found this helpful
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