Main Content

Sennheiser - CX 3.00 Earbud Headphones - Red

These Sennheiser CX 3.00 RED earbud headphones feature dynamic transducers that produce rich audio and 4 ear adapter sizes that offer ambient noise cancellation, so you can enjoy immersive listening. A 3.9' cable resists tangles for neat storage.

Headphone Buying Guide

Protect your product

Learn about Replacement Plans
Protection Plan Options

Item Added.View List

Add to List

    No lists found. Create one today.
    Add Item
    Cardmember Offers


    What's Included

    • CX 3.00 Earbud Headphones
    • Ear adapter set (XS, S, M, L)
    • Carrying case

    Ratings & Reviews

    Overall Customer Rating:
    82% of customers would recommend this product to a friend (13 out of 16)


    Earbud design

    Directs sound into the ear for deep bass and extended frequency response.

    Dynamic transducers

    Create lush cross-spectrum sound.

    4 ear adapter sizes

    Include XS, S, M and L for a custom fit that effectively blocks background noise.

    3.9' elliptical, tangle-free cable

    Allows freedom of motion during listening sessions. A 3.5mm angled plug makes it easy to connect a wide range of devices.

    17Hz - 21kHz frequency response

    Delivers faithful audio reproduction.

    Customer rating

    Rating 4.3 out of 5 stars with 16 reviews

    would recommend to a friend

    Expert rating

    Rating 3.9 out of 5 stars with 5 reviews



    Looks like there aren't enough negative mentions yet.

    • Rating: 4 out of 5 stars

      Not the best, but pretty good


      These being Sennheiser, they definitely come through with quality. They sound very full and immersive amongst all frequencies, especially the bass. I've read other reviews that say the bass on these are just too much, often overpowering. But I found it just right, full with lots of depth. The flat cable is also well constructed so that reduces much of the cable noise... A couple gripes tho: If you have a device that allows you to EQ, do it. Straight out of the box, these sound very muddy. But with some EQing, all the clarity and bass comes through. Secondly, and this is very slight, even with the EQing, at a certain point, the highs become a little washed out so some of the full crispness is lost... Regardless, these are pretty good for the price.

      I would recommend this to a friend

    • Rating: 2 out of 5 stars

      not worth the money and poor design flaw


      I'm a podcast junkie. I'm constantly listening to one of the many different espn or pulpmx podcasts I used that to jusitfy spending $60 on earbuds when I normally spend around $10. Not gonna lie I was pretty pumped waiting for these to arrive and I couldn't be more dissapointed. They dont sound any better than my $10 Samsungs. If they do I can't tell and it's not worth the extra money. Also the jack keeps popping out because of it's poor design. Most jacks are straight but because this is an L-shape it will turn and my otter box forces it out. Never had this happen with any other straight jack. Like did Sennheiser not test these on a phone/tablet in a case?? To top it off Best Buy wants a 25% restocking fee on top of the money I will have to spend to ship it back since I am "not allowed to return in store". Feeling very disgusted.

      No, I would not recommend this to a friend

    • Rating: 4 out of 5 stars

      Solidly Built, a bit bassy and barely loud enough.

      • Verified PurchaserVerified Purchase
      • My Best Buy® Elite MemberElite Member

      The build on this product is very good, the cable is of the flat variety which more or less makes the buds tangle proof. The connection points (to the buds and to the male plug) is robust. I did have 2 issues that may be of concern to some. The buds aren't quite as efficient as the CX 215's I own therefore they don't play as loud. Also the silicon ear plugs themselves are too slippery so much so that they tend to out of your ear if you perspire heavily.

      I would recommend this to a friend

    • Rating: 3 out of 5 stars

      Better off getting cheap Sony earbuds

      • Verified PurchaserVerified Purchase

      The cord is of good/ above average quality and the packaging is rather elegant. Perhaps if the sound had a bit more bass, it might make up for the over-exceeding treble. The felt tips that go in the ear tend to slip out and cleaning your ears is required for them to stay in for more than a few minutes. My overall rating of these for the money is a 6.5 out of 10. $25 would make it a near perfect purchase.

      No, I would not recommend this to a friend

    • Rating: 5 out of 5 stars

      Good Value

      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      This are high quality noise cancelling earbuds. My hard-to-please teenager loves them. I can hear them somewhat when he's next to me and they're turned up loud, but I would definitely recommend them. They've already lasted longer than any other pair he's owned, and for a great price.

      I would recommend this to a friend

    • Rating: 4 out of 5 stars


      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      Purchased at 27. The CX 300 ii were my favorite pair, but this seems to be a redesign with symmetrical cables. I was content with this pair, but they're simply not as loud, clear or even bass heavy from what I can remember. CX 300 ii is better and cheaper

      No, I would not recommend this to a friend

    • Rating: 5 out of 5 stars

      Fantastic sound !

      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      Sennheiser - CX 3.00 Earbud Headphones are great for me no microphone attachment . I listen to music a lot and I want inner earphones that fit well for me and are very comfortable too. Studio quality. Nice carry case. Simple for anyone to use as well.

      I would recommend this to a friend

    • Rating: 4 out of 5 stars

      great headphones for bass lovers

      • Verified PurchaserVerified Purchase

      These headphones were comfortable and projects your audio with no effort. If you love bass, these headphones focus on the lower EQ and i highly recommend to bass lovers.

      I would recommend this to a friend

    What experts are saying

    Rating: 3.9 out of 5 stars with 5 reviews

    Click to visit alaTest website
    The analysis of all aggregated expert reviews shows that the reviewers are positive about soundstage, mids quality, treble quality and noise isolation. Using an algorithm based on product age, reviewers ratings history, popularity, product category expertise and other factors, this product gets an alaTest Expert Rating of 84/100 = Very good quality.
    • Alphr (UK)Rating, 4 out of 5Jonathan Bray on July 20, 2016
      Sennheiser CX 3.00 review: All the fun of the fair
      Big sound, low price: the Sennheiser CX 3.00 prove that you don't need to spend big to get top-class headphonesFull Review
    • What Hi-Fi? (UK)Rating, 4 out of 5What Hi-Fi? on September 3, 2015
      Sennheiser CX 3.00 review
      Another solid performer from SennheiserFull Review
    • 11, 2015
      Sennheiser CX 3.00 review
      With more budget brands delivering premium-looking and sounding in-ear headphones, the pressure is on for the big makes to compete. The Sennheiser CX 3.00s look to bring the design, build-quality and sound quality of Sennheiser's more expensiveFull Review
    • Expert Reviews (UK)Rating, 4 out of 5Richard Easton on February 11, 2015
      Sennheiser CX 3.00 review
      The Sennheiser CX 3.00 is an extremely budget friendly pair of in-ear headphones that sound greatFull Review
    • Trusted Reviews (UK)Rating, 3.5 out of 5Edward Chester on November 3, 2014
      Sennheiser CX 3.00
      Incredibly comfortable, bass-heavy earphonesFull Review

    Product images, including color, may differ from actual product appearance.