Sennheiser CX300 In-Ear Earphones
The CX 300 black are high-quality stereo ear-canal headphones with powerful, bass-driven stereo sound for listening on the go.
Overview

Features
- Powerful, bass-driven stereo sound
- Perfect fit in the ear canal due to ear adapters in different sizes (included)
- Excellent reduction of ambient noise
- Extremely small and lightweight
- Ideal for use with your iPod and portable game systems with 3.5 mm headphone sockets
- Asymmetrical cable
Specifications
- Design : in-ear earphone
- Frequency response : 18 21kHz
- Transducer principle : Dynamic, open
- Nominal impedance : 16Ω
- SPL (1kHz, 1 Vrms) : 112 dB
- THD (A kHz, 100dB SPL) : < 0.2%
- Ear coupling : in-ear
- Weight : 4grs
What's in the box
- 1 CX 300 black ear-canal headphones
- 1 Ear adapter set (Small/Medium/Large)
- 2-year warranty
This accessory is compatible with the following:
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iPhone 3G
Most Recent Reviews
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Sennheiser CX300 In-Ear Earphones
Pretty Good
Written by MB from Liverpool
Oct 17, 2008
I have had these headphones for just over a year, i opted for the white version of these headphones. After one year they still pro…Read moreduce very good sound quality. the only complaint i have is that they whistle quite badly in the wind. Also they are looking quite dirty, i know it is to be expected of a white product but even after several attempts they still look dirty (especially around the audio plug). Overall a great product for the price.
(11 of 14 people found this review useful)
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Sennheiser CX300 In-Ear Earphones
Mediocre
Written by MR from WHITEHAVEN
Oct 15, 2008
They are an upgrade from the ipod standard ones, but after having these headphones for a couple of years now i've noticed alot of …Read moreproblems, firstly the bass is lacking and when I turn the ipod EQ on the bass becomes distorted, also as written in previous reviews when you accidently hit the wire it reverberates into the ear piece like the sound of rolf harris's wobble board in your ear. Also if you're out and about in the wind it makes a racket in your ear piece, the cone had also started collapsing and when inserting it in my ear it suctions itself onto the main piece of the earphone back. but for the price they are now they're are quite reasonable.
(6 of 17 people found this review useful)
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Sennheiser CX300 In-Ear Earphones
Excellent sound quality, but not so good reliability
Written by OS from Milton Keynes
Oct 14, 2008
Yes, the title said it all. I am very very happy with these headphones, when they work.
I am on my 3rd pair now, last two had exa…Read morectly the same problem, right headphone going quiet, i asked around and couple of guys at work had the same problem, don't know how common the problem is, but it annoying.
But as i said, the quality of the sound is absolutely amazing, the bass is strong and clarity is amazing, so overall a great buy, as long as you can return them is they go wrong(15 of 17 people found this review useful)
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Most Useful Reviews
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Sennheiser CX300 In-Ear Earphones
Get the perfect fit before writing them off!
Written by JS from Haywards Heath
Nov 11, 2006
I bought these headphones based upon numerous reviews I had read. When they arrived, I was a little disappointed. They sounded qui…Read morete 'tinny' and the bass promised was not evident. However, after getting used to them and realising they need to fit the ear canal passage snuggly, treble seems to have been reduced and the bass is much clearer. I'm no sound guru, but they certainly do a good job. They definately isolate background noise also... I can't hear anyone around me when I'm working!!
(377 of 544 people found this review useful)
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Sennheiser CX300 In-Ear Earphones
Great, but use with Bass Reducer EQ preset
Written by AS from London
Oct 16, 2006
I used to use the £70 Shure E2C, which sound amazing, but are very uncomfortable, and I didn't want to spend that much money again…Read more. At first I was a bit disappointed with the CX300 because the bass is much too pronounced, making everything sound muddy and giving me a slight headache. However, I've just started using the Bass Reducer EQ preset on my iPod and that basically sorted it out. They now sound almost as good as the Shure E2C: punchy bass but still very crisp. And infinitely more comfortable to wear! I'm impressed.
(286 of 436 people found this review useful)
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Sennheiser CX300 In-Ear Earphones
Great
Written by JG from Glasgow
Apr 4, 2006
In a word - Great!
To be more precise,
Great:
Sound – a nice clear sound, plenty of punchy bass.
Looks – a well de…Read moresigned, sleek looking piece of kit. Very Low Profile
Price – don’t spend more than this on in-ear headphones
Comfort – they slide in and stay in, you’ll forget they are there.
Price – don’t spend more on any other in-ear headphone, these will keep most audiophiles (like myself) very happy.
Other headphones of this type (ie Apple's iPod In-Ear Headphones) reportedly make a lot of rustling noises when you move, these wont make any noise you will hear over your music (but you will hear footsteps when you walk). A great all-round headphone, a must have accessory for every iPod owner. They don’t fall out your ear either.
P.S. No, I Don’t Work For Sennheiser!(280 of 438 people found this review useful)
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