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Sony

Sony SRSRF90R Wireless Speaker with Rechargeable Battery

★★★★★3.1 (8 reviews)

Immerse Yourself in Wireless Audio: Sony SRS-RF90R Wireless Speaker Experience the freedom of wireless audio with the Sony SRS-RF90R Wireless Speaker. Designed as an optional speaker for the SRS-RF90RK, this system delivers clear, powerful sound with deep bass, offering unparalleled flexibility i...

$299.99*
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*Price sourced from Amazon.com. Last updated:Jun 19, 2026.Price and availability are subject to change.

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Overview

Immerse Yourself in Wireless Audio: Sony SRS-RF90R Wireless Speaker

Experience the freedom of wireless audio with the Sony SRS-RF90R Wireless Speaker. Designed as an optional speaker for the SRS-RF90RK, this system delivers clear, powerful sound with deep bass, offering unparalleled flexibility in your listening environment.

Specifications:

  • Speaker Type: One-box speaker system
  • Woofer: 57mm
  • Tweeters: 2 x 30mm
  • Output Power: 4 Watts
  • Magnets: Neodymium (Tweeter), Sigma type (Woofer)
  • Bass Enhancement: Mega Bass system
  • Wireless Technology: 900MHz RF
  • Wireless Range: 150 feet
  • Channels: 3 (automatic channel selection)
  • Compatibility: Transmitters on MDR-RF915RK, RF815RK, and RF945RK
  • Power Options: AC adaptor or rechargeable battery
  • Battery Recharge Time: 20 hours
  • Battery Life: 3.5 hours

Key Features

Optional speaker for the SRS-RF90RK wireless system

Compatible with MDR-RF915RK, RF815RK and RF945RK

4 watts of power; Mega Bass for deep sound

Rechargeable battery system; 3.5 hours use, 20 hours recharge

150 feet of signal reception

Specifications

Product Type
Wireless Speaker
Power Output
4 watts
Bass Feature
Mega Bass
Battery Type
Rechargeable
Battery Playtime
3.5 hours
Battery Recharge Time
20 hours
Signal Reception Range
150 feet
System Compatibility
SRS-RF90RK, MDR-RF915RK, RF815RK, RF945RK

Pros & Cons

👍 Pros

  • Designed as an optional speaker for the Sony SRS-RF90RK wireless system, expanding audio coverage.
  • Compatible with specific Sony wireless systems including MDR-RF915RK, RF815RK, and RF945RK.
  • Delivers 4 watts of power, providing clear audio output for personal listening.
  • Features Mega Bass technology for enhanced deep sound, enriching the listening experience.
  • Equipped with a rechargeable battery system that offers 3.5 hours of use, allowing for portable audio enjoyment.

👎 Cons

  • This is an optional speaker and requires an existing compatible Sony wireless system (SRS-RF90RK, MDR-RF915RK, RF815RK, or RF945RK) to function.
  • The battery recharge time of 20 hours is significantly longer than its 3.5 hours of use, requiring substantial downtime between uses.
  • The 4 watts of power might be a limitation for users seeking very high volume output or room-filling sound.
  • The "Mega Bass" feature is not quantifiable, so the extent of its deep sound enhancement is subjective.
  • As a single speaker, it is not designed to provide stereo separation without additional units or a stereo source.

Frequently Asked Questions

No, this is an optional speaker designed to work with the SRS-RF90RK wireless system and is also compatible with MDR-RF915RK, RF815RK, and RF945RK systems.
The speaker's rechargeable battery provides approximately 3.5 hours of use.
It takes about 20 hours to fully recharge the battery of this wireless speaker.
This speaker delivers 4 watts of power, suitable for personal listening.
Yes, it features Mega Bass technology, designed to provide deep sound.
The speaker is capable of receiving a signal from up to 150 feet away.

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