Making ( Durrrrr) Noise in Apple Ipod Touch Full sound -Am I received the faulty product ? i dont know but i returned back. EvenSennheiser MM 400-X is doing very good job.

If you need an easy-to-connect, lightweight headset for quick trips, the Sennheiser MM 450-X are a convenient pair of Bluetooth headphones.

The lightweight design makes the MM 450-X headphones an excellent travel companion

The small on-ear design results in a smaller range of sound quality

They are great lightweight and comfortable for traveling. They do everything I wanted them for Music and phone. Bluetooth is great not having a wire to get tied up with, but wire can still be used when battery goes dead.

Had them here for about 8 months now, and they're absolutely gorgeous, before I had the Nokia bh something for 500 bucks, and it's such a big difference. Haft dom här i ungefär 8 månader nu, och dom är helt underbara, förut hade jag Nokias bh nånting för 500 spänn, och det är så stor skillnad.

When i got these, I was like - is this what my daughter's Barbies wear. The ear cushion is tiny. But don't let that deter you - the sound is okay, and BT is stable. I have 3 over the ear hps just now; THis one, Nokia BH905i and Klipsch BT Image One. All three are BT, but the Klipsch is not ANC.

When I was growing up, Sennheiser was the Ferrari of headphones – a company with a reputation for producing the best product, without compromises. Given this context, the $449 MM 450-X Travel Bluetooth Headphones seems like a bit of an odd product.

Deep Bluetooth implementation; easy to use; well-constructed; good overall audio quality

Treble bias with noise-cancelling circuitry; clicks during noise-cancelling; expensive

The Sennheiser MM 450-X headphones combine noise cancellation and Bluetooth with Sennheiser quality sound. Here's our Sennheiser MM 450-X review.

Sennheiser's MM 450-X ($449.95 direct) is a headphone pair that seemingly does it all. It's wired, it streams wireless Bluetooth audio, and has active noise cancellation circuitry. From an audio standpoint, the MM 450-X offers excellent performance whether wired or in Bluetooth mode.

Excellent audio performance with crisp, articulate highs; Supports Bluetooth and active noise cancellation; Lightweight design; Can be used as a wired pair

Noise cancellation emits audible hiss, causes some distortion on deep bass tracks at high volumes when engaged; Quite expensive; Slightly uncomfortable over long listening periods

Sennheiser's MM 450-X ($449.95 direct) is a headphone pair that seemingly does it all. It's wired, it streams wireless Bluetooth audio, and has active noise cancellation circuitry. From an audio standpoint, the MM 450-X offers excellent performance whether wired or in Bluetooth mode. The NoiseGard active cancellation feature is a bit less effective, bringing some audible hiss into the equation and, on some tracks with deep bass, adding in distortion at top volumes. If noise cancellation is your top priority, there are better options out there, but if you're primarily interested in Bluetooth and the noise cancellation is merely a convenient extra feature, the MM 450-X is worth your attention. DesignThe MM 450-X($279.99 at Best Buy) has a lightweight, supra-aural (on-ear) design. The black plastic ear cups swivel at joints just above the ear for a more precise fit, and the pads and headband are thoroughly cushioned. A metallic band with the Sennheiser logo etched on it runs through...

The versatile-but-not-flawless Sennheiser MM 450-X is a Bluetooth headphone set that also has active noise cancellation and the ability to be used as a wired pair.

Excellent audio performance with crisp, articulate highs; Supports Bluetooth and active noise cancellation; Lightweight design; Can be used as a wired pair

Noise cancellation emits audible hiss, causes some distortion on deep bass tracks at high volumes when engaged; Quite expensive; Slightly uncomfortable over long listening periods

- High quality material. - Comfortable, they are not too small and sit over the ears. - You can fold them. - 8/10 sound. - You can take your calls, control volume, and skip/pause music easily. - Somewhat short battery life. (around 7 hours) - Noise cancelling is nothing to write home about.