Sony
Sony MDRIF240RK Wireless Infrared Stereo Headphones
★★★★★
Immerse Yourself in Wireless Audio Freedom The Sony MDR-IF240RK Wireless Headphone System offers a convenient and comfortable listening experience. Enjoy deep bass and a wide transmission range without the constraints of wires, perfect for home entertainment. Drive Unit: 30mm Frequen...
$113.94*
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*Price sourced from Amazon.com. Last updated:Jul 15, 2026.Price and availability are subject to change.
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Overview
Immerse Yourself in Wireless Audio Freedom
The Sony MDR-IF240RK Wireless Headphone System offers a convenient and comfortable listening experience. Enjoy deep bass and a wide transmission range without the constraints of wires, perfect for home entertainment.
- Drive Unit: 30mm
- Frequency Response: 18Hz - 22,000Hz
- Magnet Type: Ferrite
- Diaphragm: PET
- Effective Range: 24 ft (7m)
- Infrared Carrier Frequencies: Right 2.8MHz, Left 2.3MHz (Frequency Modulation)
- Battery Life: Up to 30 hours (rechargeable), 100 hours (optional AA alkaline)
Key Features
Connectivity Technology: Wireless
IR wireless system with 24-foot range and 90 degree maximum transmission angle
NiCad battery lasts up to 30 hours on a single charge, recharges in 24 hours
Headphones feature 30mm diameter PET drivers with ferrite magnet for superb sound
Lightweight (6.3 ounce) phones feature open-air design with wide headband for comfort
Frequency response: 18Hz - 22,000Hz
Specifications
Brand
Sony
Model
MDRIF240RK
Connectivity Technology
Wireless (Infrared)
Wireless Range
24-foot
Transmission Angle
90 degree maximum
Battery Type
NiCad
Battery Life
Up to 30 hours (single charge)
Recharge Time
24 hours
Driver Diameter
30mm
Driver Material
PET drivers with ferrite magnet
Weight
6.3 ounces
Design
Open-air, Wide headband
Frequency Response
18Hz - 22,000Hz
Pros & Cons
👍 Pros
- Features an IR wireless system with a 24-foot range and a 90-degree maximum transmission angle, providing freedom of movement.
- The included NiCad battery offers an impressive up to 30 hours of listening on a single charge.
- The headphones can be recharged in 24 hours, ensuring they are ready for use again within a day.
- Equipped with 30mm diameter PET drivers and ferrite magnets, delivering superb sound quality.
- Lightweight at 6.3 ounces, combined with an open-air design and wide headband, ensures comfort during extended listening sessions.
- Offers a broad frequency response of 18Hz - 22,000Hz, capturing a wide range of audio details.
👎 Cons
- The IR wireless system requires line-of-sight to the transmitter, which can be interrupted by obstacles or movement outside the transmission angle.
- A 24-hour recharge time for the NiCad battery is relatively long, requiring advanced planning for subsequent uses.
- The NiCad battery type might be considered an older technology compared to more modern, faster-charging battery options.
- The open-air design, while comfortable, means sound leakage can occur, potentially disturbing others or allowing ambient noise in.
- The 24-foot range may be limiting in larger rooms or environments where greater distance from the transmitter is desired.
Frequently Asked Questions
What kind of wireless technology do the Sony MDRIF240RK headphones use?
The Sony MDRIF240RK headphones utilize an IR (Infrared) wireless system for connectivity.
What is the maximum range and transmission angle for these wireless headphones?
These headphones have a wireless range of 24 feet and a maximum transmission angle of 90 degrees.
How long does the battery last on a single charge, and how long does it take to recharge?
The NiCad battery in these headphones lasts up to 30 hours on a single charge and requires 24 hours to fully recharge.
What features contribute to the sound quality of these headphones?
The Sony MDRIF240RK headphones are equipped with 30mm diameter PET drivers and ferrite magnets, which are designed to deliver superb sound, supported by an 18Hz - 22,000Hz frequency response.
Are these headphones comfortable for extended use?
Yes, they are lightweight at 6.3 ounces and feature an open-air design with a wide headband, all contributing to comfort during long listening sessions.
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