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  • Sony MDR-AS20J Active Series Headphones
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Sony MDR-AS20J Active Series Headphones

by Sony
162 customer reviews

Currently unavailable.
We don't know when or if this item will be back in stock.
  • Newly developed loop hangers prevents headphones falling and fit a wide range of ear sizes
  • Soft loop hangers for comfortable fitting
  • Lightweight clip-on style (vertical in the ear)
Currently unavailable. We don't know when or if this item will be back in stock.

Product details

  • Product Dimensions: 0.8 x 0.8 x 0.8 cm ; 14 g
  • Boxed-product Weight: 82 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: MDRAS20J.AE
  • ASIN: B00165R8XU
  • Date first available at Amazon.co.uk: 17 Mar. 2008
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (162 customer reviews)
  • Amazon Bestsellers Rank:


Customer Questions & Answers

Customer Reviews

4.0 out of 5 stars

Most Helpful Customer Reviews

13 of 13 people found the following review helpful By Palfie on 4 April 2010
I bought these headphones after reading several highly positive reviews. However, when I first wore them I was very disappointed by the sound, which was thin and tinny. By pressing the ear pieces deeper into my ears, I noticed an immediate and massive improvement in the sound. All well and good, but you can't walk around with your fingers in your ears! To rectify the problem I found that the position of the ear piece could be altered by twisting it on the rubber frame so that the sound is directed down my ear canal rather than against the inside of the tragus (the bit of the outer ear that the phones sit behind). Each earpiece sits on a curved silver plastic tube. You need to grip this tightly as well as gripping the piece of rubber frame that comes out of the plastic frame. Twist the tube until it naturally sits in an angle relative to your ear canal. You will probably need to overtwist it, because the material is quite springly and will just return to its normal position. Give it a try, if you are experiencing similar problems. This little modification has turned my pair from One star quality to Five star quality.
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65 of 67 people found the following review helpful By Amazon Customer on 11 July 2008
Verified Purchase
I do not like headphones that totally seal in my ears, as this does not do much for my eardrums. Normal in-ear headphones simply fall out so often. I have tried the type that clip over the ear, which are better, but with some energetic exercises these still fall off. I like the fact that they sit in the ear, without sealing it, so give better volume than the type that sit outside.
This new Sony design is great, easy to use, comfortable and it stays in place (it is even splash proof) and of course the sound quality is as you would expect SONY (they were first tried with my 8Gb Sony Walkman, but they also improved the quality from a Philips MP3 player). At this price I think these are great value and quality.
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3 of 3 people found the following review helpful By A Bowles on 27 Feb. 2013
Verified Purchase
The ear fit is very comfortable and does not slip when running.
The sound quality is adequate for the price.
The cable quality seems appropriate for the price.
The cable is aligned 90 degrees to the jack, this helps prevent sharp jerks from pulling the jack out when on the move. If you are using a bulky running carry pouch for your MP3 player there may not be enough clearance to fully insert the jack - there is about 4mm of clearance.
Overall a good set of headphones that will do the job well but won't set the world on fire.
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3 of 3 people found the following review helpful By Amazon Customer on 14 July 2011
I bought these so I could go jogging, but they are so big (i'm a guy and have big ears)that when I jog with them they rattle around and even fall off. I would not recommend you to buy them. My previous panasonic wrap around the ears type (not a complete loop like these Sony ones)are 100 times better and I willbe re-investing in a similar pair. Buy these at you own risk but prepare to be disappointed. Also you have to rip open the plastic casing in such a way that returning them is really not much of an option.
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2 of 2 people found the following review helpful By Ed arobinson on 24 May 2009
Verified Purchase
I don't know How Sony do it, but they keep coming up with better and better headphones. I've had a few pairs from them, and never been disappointed. I bought these to replace some Sennheiser ones which were new, only worn a couple of times, but were so very very substandard compared to even the cheapest of Sony headphones. I'll never buy Senns again they're rubbish, just cheap bass sound.
I know I can always buy Sony in future and be delighted with them. Buying on-line can be awkward if you haven't seen the product...I'd never seen these, but trusted Sony enough to buy anyway. Brilliant bargain.
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12 of 14 people found the following review helpful By I. Porczynski on 6 Oct. 2009
I, like most people, have spent lots of time and money trying to find the perfect earphones for use in the gym and in the majority of cases have ended up disappointed. These seemed like they were ideal due to the enclosed earloop design (having a hook or a loop is the ONLY type of earphone that works comfortably in the gym, believe me), the in ear piece is ideal for comfort, as they don't dig into your ear, and as long as the hook/loop holds them in place the sound quality from Sony is always good with excellent bass.

These started off brilliantly, great sound volume and bass, stayed fixed in place in my ear (only get these if you have above average sized ears), and comfortable. I had finally found the perfect pair...

But, then the big problem. I do tend to sweat in the gym (who doesn't?) and this includes in the ears too... all of a sudden the sound faded completely, to a whisper. Rubbish, I thought I had a faulty pair. But then on the next trip to the gym they were again perfect to start of with, I started sweating again, and hey presto same thing happened, and then for a third time too.

It appears they are NOT sweat or splash resistant and need to dry out before working again. This is a massive disappointment from Sony as I was previously using MDR-J20s from Sony with exactly the same earpiece and they don't have the same problem although they are earhook so can hang off your ear quite frequently.

Sort these out to be sweat/splash resistant and they would be perfect. A shame.
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1 of 1 people found the following review helpful By Gordz on 14 Jan. 2011
Being a sport scientist I spend a lot of time on bikes, treadmills and out running. And being a sport scientist, I also understand how important music can be motivation...

I've gone through loads of 'sport' headphones, but these are by far the best.

They fit my ears perfectly and stay put, even when orienteering training on rugged terrain where my head is moving around quite a lot and where all my other headphones have failed.

I must admit though, if you have small or very large ears then these may not work for you! My ears are aprox. average-large size (I don't know how to measure ears!!!) and they fit perfectly.

Only downside is that I find the clip extremely hard to open when trying to attach it to my clothing.

So overall - these are the best headphones I've ever used for running that actually stay put and give good sound quality, but don't block out too much noise, so I can still hear traffic etc.
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