Panasonic RB-M500B Wireless Headphones, 40mm Driver

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Build Aspect

The RB-M500B are a pair of wireless headphones designed for bass-heads Panasonic. Clearly the RB-M500B look identical to the RB-M700B. Subsequently the overall build is similar i.e., they re made from plastic with metal internals, with same durable feel. Moreover the finish is smooth with a minimal yet elegant design. One big difference here is the mechanism of ear-cups, unfortunately these smaller siblings lack swivel in the ear cups. Therefore the fitting is not as comfortable, despite the same levels of padding and cushioning. However the battery life is good as its rated for 30 hour rated runtime.

Performance Aspect

These wireless headphones are fitted with 40mm drivers. As a result they have powerful bass with lots of rumble and punch. In addition to quantity the quality of lows are also good, with bass being fast and deep. The midrange is shallow and makes vocals sound thin and unrevealing. Thankfully the treble is cohesive and dynamic. Moreover the texture is smooth therefore cymbals and hi hats sound perfect. Furthermore the microphone is decent and as a result call quality is acceptable. Are these headphones good? Yes, as far as wireless headphones under 5000 go these Panasonics are a good buy.

Also: View a top-rated pair of Sennheiser headphones on Amazon before finalizing.


Well built, durable construction.
Good audio performance.
Lasting battery life.


Mid range is laid back.
Fitting is not ideal.
Flimsy buttons.

Product Details

  • ULTRA-LOW BASS RESPONSE Immerse yourself in powerful deep bass, without compromising the depth and balance of the track, reliable Bluetooth wireless connection and built-in microphone
  • DEEP BOOMING BASS Experience the same vibe you would get at a concert or club with a built-in, 3-level Bass Reactor that amplifies low frequencies for a fully immersive sensation
  • DUO POWER DRIVERS Two 40 mm Neodymium driver units provide deep, yet delicate bass sound
  • 30 HOURS PLAYBACK On a full four-hour charge, plus quick 15min charge for 2 hours playback
  • HIGH-COMFORT FIT Soft cushioned headband and earpads fit gently over the ears for hours of anytime anywhere comfort



  • Driver Unit (mm)

    • 40 mm (1-9/16 in.)
  • Magnet Type

    • Neodymium
  • Impedance (Ω) (Power off, with cord)

    • 27 Ω
  • Sensitivity (dB/mW) (Power off, with cord)

    • 100 dB / mW
  • Frequency Information

    • Frequency Response (with cord)

      • 20 Hz – 20000 Hz
    • Frequency Band (with Bluetooth®)

      • 20 Hz – 20000 Hz
  • Control/ Mic

    • ● / ●
  • Playback Time with Battery

    • Approx. 30 hours
      ( Bass reactor: Off, SBC)
  • Charging Time (25°C/ 77°F)

    • Approx. 4 hours
  • Quick Charge (15 minutes)

    • Approx. 2 hours
  • Weight (without cord)

    • Approx. 316 g (11.1 oz)
  • Supplied Item

    • USB charging cord: Approx. 0.5 m (1.6 ft.)
      * Input Plug: USB A Shape, Output Plug: USB Type-C Shape
      Detachable cord: Approx. 1.2 m (3.9 ft.)
  • Cord

    • Cord Length (m)

      • 1.2 m (3.9 ft.) detachable
    • MiniPlug (3.5 mm)

    • Plug

      • Gold

Advanced Function

  • Bluetooth® Wireless Technology

    • Version

      • 5
    • Supported Profiles

      • A2DP, AVRCP, HSP, HFP
    • Codec

      • SBC, AAC
    • Operating Distance

      • Up to 10 m (33 ft.)
  • Active Noise Cancelling


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