Product Description

# Frequency Response: 10-20 000 Hz # Dynamic element for extended frequency response # Unique earbud design directs sound into the ear canal for deep bass and extended frequency performance # Speciality ear cushion material forms slowly in the ear canal to provide a custom fit and maximum isolation # Includes replacement ear

Product Details

• Amazon Sales Rank: #4253 in Consumer Electronics
• Brand: Koss
• Model: 156423
• Released on: 2007-10-28
• Original language: English
• Dimensions: 1.26" h x 4.49" w x 5.98" l, .9 pounds

Manufacturer's Description
The SparkPlug features a dynamic element that is positioned just outside the ear and connected to a tubular port structure that is inserted on a soft expandable cushion into the ear canal. The soft foam cushion expands for a custom fit to improve isolation and enhance deep bass and treble clarity. Now with improved slow memory ear cushion made of hydrophillic, formed urethane, you are guaranteed a custom fit every time.

Ths SparkPlug also featues a white cord to compliment many MP3 players. The fit enhances isolation when you want to plug out ambient sounds that interfere with the listening experience. The SparkPlug has a frequency response performance of 10Hz-20,000Hz and full Sound of Koss. Combined with your favorite music and a portable sound system, it is the ultimate accessory on the go.

Built to last, The SparkPlug is covered under Koss' No-Questions-Asked Lifetime Warranty - the only warranty of its kind in the stereophone industry.

Box Contents

Customer Reviews

Good, but...
I bought the Spark Plugs after I had misplaced my Plugs (the 1st Koss version), which were very good. I thought that the new updated Plugs would be better, however for me, they weren't as good. The white plastic speaker part is too deep for me, and protudes further out of the ear than the Plugs, which people can live with, and they ARE white, yey. However for me the biggest difference was that Koss had promised a better sound than the old version Plugs, but IMHO (I realise I am no expert), they're very bassy, almost too much so, with not enough treble and mid. You can however, remedy this by adjusting the sound qualities on your generic MP3 player, ie treble boost, which I didn't need to do for the original Plugs.
I suppose what I'm saying is if you're buying something like these for the first time, I'd seriously consider buying the Plugs, rather than the Sparkplug. What properties DO share though are incredible comfort, very light weight, good sound insulation and good bass. I hope this helps.

Better than sony
I previously owned the Sony MDR-EX70 - very comfortable but the sibilance was unbearable. No such problems with these superb Spark Plugs - slightly less comfortable but fantastic sound. I doubt you'd want them for classical music but for anything else these are awesome. If you like bass and sound isolation these are definitely worth a try.

Good idea but not so well implemented
This product feels a bit like a missed opportunity.
The good:
-Good noise insulation: have you ever tried those spongy earplugs they give you on planes? They REALLY reduce external noise. Well, this is the kind of noise insulation you get from these headphones. So, from this point of view I agree with other people. If you commute on a noisy train like me you will like this
-Good music reproduction: this headphones are good quality and LOUD!! Combined with the good noise insulation it means you can really turn down the volume on your mp3 which means more linearity, more battery life and safer environment for your ears. On my mp3 volume goes from 0 - 100. With this headphones I could reduce the volume by 20 points with respect to the provided phones. Not bad!

The not so bad:
-Booming basses: as other have reported, these phones really have some deep basses. I imagine that is because low frequency get through the spongy material itself "resonating" in you ear. I guess drum&base lovers will like it. Also I have to say that if the music does not contain too many basses (classical, jazz) , you don't notice the effect. Probably you have a problem if you music is full of basses but they are not meant to be predominant. For example, the guitars of some modern metal bands are full of basses and they sound muddy with this phones.

The bad:
-In my package I found 4 plugs. 2 already fitted and 2 spare ones. Well 2 of them are unusable. That halves the life of the phones! One was crashed due to the poor packaging and did not recover. The second one is victim of the big defect of this product:
-Bad quality of the plug sponge: the problem is that it sticks to itself. So, in order to ensure that the middle hole does not remain closed when you crush it to put it in you ear, a hard plastic tube is fitted in the hole. Unfortunately, one of the plugs is missing the plastic tube so that the first time I tried to fit it in my ear the hole closed and did not open again. I don't quite understand such a silly flaw. The noise reduction plugs you buy in drugstores are extremely cheap but they are better insulator than these plugs and the sponge does not stick to itself. How such a poor material was chosen is a mystery.

The verdict:
If your commuting is noisy and you want to stick to small earbud phones, I think this are worth considering. Definitely, they are worth £7. Especially if you are lucky and all 4 plugs are in good state. If you pay the delivery fee on top of the price maybe they are not so good value. Personally, I am moving to foldable earpad phones. They are bigger but they are a better solution to noise. This plug phones have potential but the design needs improving.