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Blue in-ear headphones with thin cable and small buds

Sony

Sony MDRE9LP/BLU Blue Earbud Headphones

SKU CH-AYK9-4S81W MPN MDRE9LP/BLU

Blue binaural earbuds with 13.5 mm neodymium drivers, 18 Hz–22 kHz response, 3.94 ft cord and 0.21 oz weight

  • TypeHeadphones
  • ColorBlue
  • Ear CouplingBinaural
  • Cord Length3.94 ft
  • Weight0.21 oz
  • Microphone Frequency ResponseMinimum Frequency Response 18 Hz - Maximum Frequency Respons
  • Clear audio across 18 Hz to 22 kHz range
  • Powerful bass from 13.5 mm neodymium drivers
  • Ultra-light at .21 oz for all-day comfort
  • 94 ft cord gives freedom of movement
  • Blue binaural design for classic stereo listening

Lightweight Blue Earbuds

The Sony MDRE9LP/BLU earbuds weigh 0.21 oz and use a 3.94 ft cord for a simple wired connection. Their binaural design and blue finish suit listeners who want a basic, colour-coordinated pair for daily use. No battery or pairing is required, so they work instantly with any 3.5 mm jack. They are not for buyers who need wireless freedom, active noise cancellation or an inline microphone.

13.5 mm Neodymium Drivers

The 13.5 mm driver units with neodymium magnets deliver consistent output during long listening sessions without the compression that can appear in very small buds. Bass response stays present even at moderate volumes, and the light housing keeps ear fatigue low over hours of wear. They are not for users who demand studio-grade flat response or high-impedance matching for dedicated amplifiers.

18 Hz to 22 kHz Frequency Range

The microphone frequency response spans 18 Hz to 22 kHz, covering the full audible spectrum for clear voice capture on calls and voice memos. This single range determines whether the earbuds meet a buyer's need for intelligible speech pickup without external gear. They are not for recordists who require a wider measured bandwidth or a detachable boom microphone.

Highlights

  • Clear audio across 18 Hz to 22 kHz range
  • Powerful bass from 13.5 mm neodymium drivers
  • Ultra-light at .21 oz for all-day comfort
  • 94 ft cord gives freedom of movement
  • Blue binaural design for classic stereo listening

Specifications

BrandSONY
ModelMDRE9LP/BLU
TypeHeadphones
ColorBlue
Ear CouplingBinaural
Cord Length3.94 ft
Weight0.21 oz
Microphone Frequency ResponseMinimum Frequency Response 18 Hz - Maximum Frequency Response 22 kHz
Shipping weight0.14 kg
Package size25 × 25 × 25 mm

Questions about this item

How much power does the 13.5mm driver draw during all-day listening?

Passive earbuds need no battery; the 13.5mm neodymium drivers run entirely from the source device, so heat and power draw stay negligible.

What connector must my device have for these earbuds to work?

A standard 3.5 mm headphone jack is required; the 3.94 ft cord ends in a straight plug that fits phones, laptops and portable players.

Will the 18 Hz to 22 kHz range still sound balanced through an older portable player?

Yes, the wide frequency response and 0.21 oz weight mean the earbuds reproduce deep bass and clear treble even from lower-output legacy devices.

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