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Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red
Sennheiser CX 300s In-ear Headphones - Red

Sennheiser CX 300s In-ear Headphones - Red

$3.59

(405 reviews)

The CX 2.00 has been succeeded by the CX 300S.Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Overview Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Features Built-in microphone and remote for call and music control. Ergonomic In-Ear design for ambient noise isolation and undisturbed listening. Tough and tangle-free cable for long-lasting listening enjoyment.

The CX 2.00 has been succeeded by the CX 300S.Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Overview Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Features Built-in microphone and remote for call and music control. Ergonomic In-Ear design for ambient noise isolation and undisturbed listening. Tough and tangle-free cable for long-lasting listening enjoyment.

Sennheiser CX 300s In-ear Headphones - Red

(405 reviews)

The CX 2.00 has been succeeded by the CX 300S.Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Overview Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Features Built-in microphone and remote for call and music control. Ergonomic In-Ear design for ambient noise isolation and undisturbed listening. Tough and tangle-free cable for long-lasting listening enjoyment.

The CX 2.00 has been succeeded by the CX 300S.Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Overview Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Features Built-in microphone and remote for call and music control. Ergonomic In-Ear design for ambient noise isolation and undisturbed listening. Tough and tangle-free cable for long-lasting listening enjoyment.

$3.59 - $73.55

in 5 offers

The lowest price for Sennheiser CX 300s In-ear Headphones - Red right now is $3.59 at AliExpress.com - AliExpress-226247430, compared across 4 retailers.

The all-time low was $2.93 on 7 May 2026 — today's price is 23% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 28 June 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 28/06/2026 09:38:23

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$59.99

Sennheiser In Ear Headphones CX 300, Red

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

AliExpress.com - AliExpress-226247430

$3.59

Sennheiser CX 300S Wired Earbuds In Ear Headphones HiFi Stereo Bass Noise Isolating Earphones with

Free delivery

eBay.com.au

$44.41

Sennheiser Cx300s Pure Bass-driven In Ear Earphones Stereo Headset 3

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$73.55

Sennheiser Cx 300s Ear Canal Headphone With Universal Smart Remote -

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Smooth Sales

$69.95

Sennheiser CX 300S In-Ear Headphones - Red

Delivery between 2–7 July $7.95

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

12 August 2022

originally posted on pbtech.co.nz

I am an interpreter who receives assignments any time for remote interpreting (phone&online), so I needed to have flexible but very clear headphones that can be used when I receive calls in a noisy place.These headphones are just amazing and have noise cancelling that I rarely use, because the voice comes very clear and loud enough.Just the mic does not always pic my voice clearly, so I need to make sure it is very close to my mouth, and sometimes under a face mask so others can hear my voice well.Also, the wire is not strong enough, and I am not sure how long it would last.

22 September 2022GeneS6

originally posted on pbtech.co.nz

I had an old iPod for which I suddenly found a good use. Having converted to Bluetooth a while ago, I had serious trouble locating a pair of earphones I could use with the iPod. After failing the usual venues, I decided to buy a new pair and spent an hour checking what was good on the market. I finally discovered CX300S and realised that PBTech had them 30% cheaper than others. After the usual easy buying process, I picked up the new earphones and was amazed at how well they fit and how good the sound was. Now I am also grabbing an old lightning adapter to use CX300S for my iPhone!

21 May 2022SimonLong

originally posted on pbtech.co.nz

I was using apple wired earbuds before making this purchase. The apple earbuds were really hard and uncomfortable in your ears after a long period of time since I was a hard out gamer and when these earbuds arrived at my doorstep, it was the best decision I've ever made throughout my gaming accessories. Personally, at first I found these earbuds uncomfortable in my ears during the first few weeks wearing them but then my ears got used to them and you'll never feel any discomfort while wearing these. I'd partly say they are noise cancelling and the audio quality will not disappoint you. As a Rainbow Six Siege player, I highly recommend these earbuds for those who are looking for them.

Specification

Impedance18 Ω
Frequency response (Microphone)100 – 10,000 Hz (-10 dB)
Frequency response17–21,000 Hz (-10 dB)
Sound pressure level (SPL)118 dB
THD, total harmonic distortion<0.5 % (1 kHz, 100 dB SPL)

Price comparison

Updated 4 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$59.99

Sennheiser In Ear Headphones CX 300, Red

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

AliExpress.com - AliExpress-226247430

$3.59

Sennheiser CX 300S Wired Earbuds In Ear Headphones HiFi Stereo Bass Noise Isolating Earphones with

Free delivery

eBay.com.au

$44.41

Sennheiser Cx300s Pure Bass-driven In Ear Earphones Stereo Headset 3

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay.com.au

$73.55

Sennheiser Cx 300s Ear Canal Headphone With Universal Smart Remote -

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Smooth Sales

$69.95

Out of stock

Sennheiser CX 300S In-Ear Headphones - Red

Delivery between 2–7 July $7.95

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

12 August 2022

I am an interpreter who receives assignments any time for remote interpreting (phone&online), so I needed to have flexible but very clear headphones that can be used when I receive calls in a noisy place.These headphones are just amazing and have noise cancelling that I rarely use, because the voice comes very clear and loud enough.Just the mic does not always pic my voice clearly, so I need to make sure it is very close to my mouth, and sometimes under a face mask so others can hear my voice well.Also, the wire is not strong enough, and I am not sure how long it would last.

originally posted on pbtech.co.nz
22 September 2022

I had an old iPod for which I suddenly found a good use. Having converted to Bluetooth a while ago, I had serious trouble locating a pair of earphones I could use with the iPod. After failing the usual venues, I decided to buy a new pair and spent an hour checking what was good on the market. I finally discovered CX300S and realised that PBTech had them 30% cheaper than others. After the usual easy buying process, I picked up the new earphones and was amazed at how well they fit and how good the sound was. Now I am also grabbing an old lightning adapter to use CX300S for my iPhone!

GeneS6 originally posted on pbtech.co.nz
21 May 2022

I was using apple wired earbuds before making this purchase. The apple earbuds were really hard and uncomfortable in your ears after a long period of time since I was a hard out gamer and when these earbuds arrived at my doorstep, it was the best decision I've ever made throughout my gaming accessories. Personally, at first I found these earbuds uncomfortable in my ears during the first few weeks wearing them but then my ears got used to them and you'll never feel any discomfort while wearing these. I'd partly say they are noise cancelling and the audio quality will not disappoint you. As a Rainbow Six Siege player, I highly recommend these earbuds for those who are looking for them.

SimonLong originally posted on pbtech.co.nz
Best headphones I've had in a while
4 August 2021

I won't lie, these were my first 'big boy' headphones since graduating from less good sound quality competitors. The bass on these is insane, noise cancelling excellent if you use the right fitting inear mould. I've had them since mid 2019 and are still going strong, they went through a washing machine in the leather case that comes with them and have had zero problems whatsoever. I will absolutely buy these again if the need ever arises. Wonderful headphones. Only problem is they can be uncomfortable for long periods of time (think plane trips 5+ hours, anything shorter is fine) and if you're walking super fast or running they probably won't be as secure. Other than that, wonderful, I love them.

mads9 originally posted on jbhifi.com.au
Good experience
24 September 2020

I got these as a birthday present and I must say, the audio from these are magnificent. They have vibrant mids, good bass, and can block out a large amount of background noise such as car engine, and loud shopping centre (you just need to adjust the volume as per liking). I only have two complaints about these. 1. When I first got them if you tapped the part where the audio connecter bends (it has a 90 degree angle plug which I really like) the audio would sometimes cut out, but as long as you don’t accidentally knock it this will almost never happen. And 2. These fall out super easily so if you are looking to buy these as your next pair of workout earphones, DON’T. But as long as you aren’t wearing these while working out or jogging they are excellent.P.S. I have ... MoreI got these as a birthday present and I must say, the audio from these are magnificent. They have vibrant mids, good bass, and can block out a large amount of background noise such as car engine, and loud shopping centre (you just need to adjust the volume as per liking). I only have two complaints about these. 1. When I first got them if you tapped the part where the audio connecter bends (it has a 90 degree angle plug which I really like) the audio would sometimes cut out, but as long as you don’t accidentally knock it this will almost never happen. And 2. These fall out super easily so if you are looking to buy these as your next pair of workout earphones, DON’T. But as long as you aren’t wearing these while working out or jogging they are excellent.P.S. I have seen a lot of reviews of this product breaking or being unreliable, but I have not experienced it, that doesn’t mean it won’t happen so keep that in mind.

Reuberg originally posted on jbhifi.com.au
Never regret:) Awesome sound, advanced feature
1 July 2020

I had heard from others Sennheiser is well known brand and good reputation. This was my first Sennheiser item and i bought this at great price when it was on special.I purchased other brands earphones before but it didnt meet my expectation. I wanted clear sound with some bass. And i did not want wireless one to avoid frequent charge.With no hesitation, I ordered a white one and it came with such a nice package. Different size earplugs let me enjoy more by minimising surround noise. Nicely fit and long enough cable. Box came with small pouch to keep my earphone safely when carried.This is one of the items that i never regret paying and possessing. Sound is clear with abundant bass (enough to me) and design is very neat and advanced feature in my point of view. I ... MoreI had heard from others Sennheiser is well known brand and good reputation. This was my first Sennheiser item and i bought this at great price when it was on special.I purchased other brands earphones before but it didnt meet my expectation. I wanted clear sound with some bass. And i did not want wireless one to avoid frequent charge.With no hesitation, I ordered a white one and it came with such a nice package. Different size earplugs let me enjoy more by minimising surround noise. Nicely fit and long enough cable. Box came with small pouch to keep my earphone safely when carried.This is one of the items that i never regret paying and possessing. Sound is clear with abundant bass (enough to me) and design is very neat and advanced feature in my point of view. I am super satisfied with this and carrying it all the time:)

Haze originally posted on harveynorman.co.nz
Not for me.
26 October 2022

I honestly can't comment on the sound quality of these - I can't wear them long enough to get a good idea. For my ears they are at best uncomfortable, and at worst fall out; and a fit of any security runs a knife edge of blocking that ear from hearing anything at all.Also, the way vibration conducts through the cord into the ears is ++not enjoyable: merely breathing results in earthquake-like rumbling. Maybe I would get used to that eventually, but a) I shouldn't have to; b) I don't want to; and c) they don't stay in, remember? ;pThis has been my first and last experiment with wired in-ear 'phones.

Evan C. originally posted on pccasegear.com
Questionable durability
17 June 2021

These earphone are fairly high quality for the price they generally sell for. They have the classic sennheiser crispness to the mids and highs, with the bass being okay for in ear headphones. I found the supplied ear tips to be fairly decent, with the medium sized ones fitting my ears the best. Meaning I was a little devastated when one of the tips decided to go missing. Another note is that a lot of the handling noise on the cable makes its way to your ear.The problems are mostly with the durability of these headphones, with mine breaking already after 3 months of near daily use. The 3.5mm jack split, leaving the headphones essentially dead. I was a little rough with the headphones, but for earbuds that are expected to be something you wear on the go, they ... MoreThese earphone are fairly high quality for the price they generally sell for. They have the classic sennheiser crispness to the mids and highs, with the bass being okay for in ear headphones. I found the supplied ear tips to be fairly decent, with the medium sized ones fitting my ears the best. Meaning I was a little devastated when one of the tips decided to go missing. Another note is that a lot of the handling noise on the cable makes its way to your ear.The problems are mostly with the durability of these headphones, with mine breaking already after 3 months of near daily use. The 3.5mm jack split, leaving the headphones essentially dead. I was a little rough with the headphones, but for earbuds that are expected to be something you wear on the go, they weren't suited for the task.

Connor131 originally posted on jbhifi.com.au
Sennheiser CX 300S YES This is highly recommended
6 September 2022

Just the instrument I've been looking for to reproduce the perfect balance of Bass Mid-range & crisp Tweeter effects. (Be sure the ear bud is fitted in your ear to form a seal for best sound) I definitely recommend these for the audiophile listeners and those that just want great sound with the old school cables, which by the way are very easy to untangle due to its design. Comfortably Loud enough in the ear considering the bud is still discretely small, comfortable in bed sleeping on it in my ear. Great gift idea for any person who loves it when their music just sounds perfect.

originally posted on jbhifi.com.au
Underwhelming (extremely)
8 June 2022

Acceptable sound quality for the price (i.e. better than the tin can apple earphones, which is akin to being the best downhill skier in Mexico); however, after a month and a half of light/routine use and standard care, the left side stopped working completely. Unacceptable--nobody expects a world class product a $50 price point, but it should at least be durable enough to last beyond the first month and half. Fool me once...

Ken originally posted on bhphotovideo.com

Specification

Impedance18 Ω
Frequency response (Microphone)100 – 10,000 Hz (-10 dB)
Frequency response17–21,000 Hz (-10 dB)
Sound pressure level (SPL)118 dB
THD, total harmonic distortion<0.5 % (1 kHz, 100 dB SPL)

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