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Sony MDR-AS20J Active Series Headphones

Released on 10 August 2009

Manufacturer: Sony

4.0 out of 5 (18 customer reviews) | Write a review

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Manufacturer's description:

If you're always on the move, then you need a set of headphones that don't. Since Sony produced their first headphones in 1979 they have been constantly striving to create an ever more perfect fit. The newly developed secure-fit technology with built-in shock absorption ensures they can withstand every type of intense activity and deliver the perfect uninterrupted audio experience. So if you're off jogging or going to the gym, with 5 different styles to choose from you'll find the ideal Active Series Headphone.


Working out
Music's great when you're working out. It's about to get even better, thanks to the new Active Series Headphones, the perfect blend of sound quality and secure fitting design. The Active Series headphones have the ultimate staying power whether you're pounding the treadmill or the pavement.



Pure Sound on the go
Combining shock-absorbing technology, short armband cords and sweat-proof materials, these stylish headphones are perfect for an active lifestyle. Giving you consistent sound quality they allow you to really enjoy your music.



Designed for movement
Light, compact and discreet, they still provide high-quality, deep bass sound. And the Active Series secure fit design means when you're on the move your headphones will stay on.

  • Features
  • Newly developed loop hangers prevents earphones falling and fit a wide range of ear sizes
  • Soft loop hangers for comfortable fitting
  • Lightweight clip-on style (vertical in the ear)
  • Supplied Accessories
  • Clip
  • Advanced Spec
  • Open Air Type
  • Dynamic Type
  • Capacity: 0.05 Watts
  • Driver unit: 13.5mm diameter, dome type
  • Diaphragm: PET
  • Frequency: 18 - 22,000 Hz
  • Sensitivity: 104 dB/mW
  • Magnet: Neodymium
  • Impedance: 16 Ohm
  • Cord type: TPC Y-shape
  • Cord length: 1.2 m
  • Plug: Straight stereo mini plug (gold)
  • Weight: 13g

customer Reviews

 Average rating (18 reviews)

 Fantastic

| | See all fhmm160's reviews (1)

I use these in the gym, the sound quality is excellent, very comfortable to wear and they have coped with walking, cycling and weight lifting. Ordering another pair in case I lose them, can't do without them.

 rubbish

| | See all jinjin's reviews (1)

Had these headphones less than 4 hours and they developed a fault, one stopped giving sound. Absolutely horrible fit in the ear very uncomfortable, they are just too big for normal ears. After this absolute disgrace of a product I will never touch any of Sony's products, just awful. I have never bought any which has lasted for less than 4 hours. Buy these headphones at your own peril. To top it all off the sound is terrible you can barely hear your music extremely quiet.
Stay way clear of these headphones

 Excellent product

| | See all SoqedHozi's reviews (1)

Comfortable and good sound, the rubber has come away on one headphone after allot of use, but they still fit nicely regardless.

 these are brill. Had them a year and still good :)

| | See all kw1234's reviews (1)

as it says in the title, have used them pretty much every day too. Fantastic!! Will deffo be ordering another pair.

 Love 'em

| | See all 8thSpiff's reviews (1)

great quality, i got one to work out,they are durable and the sound quality is also really good...i love them so much i got a second one incase :D

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