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

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. 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

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

General Review Unfortunately not the be-all-end-all. After seeing and hearing the MM450X at the Frankfurt Airport I though it had it all and could do it all: Bluetooth apt-x, noise cancelling, bluetooth headset, wired passive, talk-through, compact and foldable, easy to recharge, and with decent...

Portable; bluetooth; aptx; headset; NoiseGard

difficult fitment; not great sound

Overall very satisfied with these headphones. Stereo sound over Bluetooth is surprisingly good. Very accurate with little to no hiss or background noise. Noise cancellation is very effective and talk-through is handy. The range of these is phenomenal.

After reviewing many makes and models of headphones, the Sennheiser MM450 was the one I chose. I'm thrilled with my selection !! Perfectly compact for travel and versatile use for audio cable or bluetooth. Plus, they are Active Noise Cancelling. I was really impressed with the bluetooth range.

Clear Sound; Easy Controls; Lightweight; Top Quality; Versatile

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.

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

The Sennheiser MM 450 Travel is a Bluetooth-enabled supra-aural headset that folds up for easy portability. It has inbuilt active noise-cancelling and an internal microphone to allow complete integration with a Bluetooth-equipped mobile phone.

Great noise-cancelling for an on-ear model; flawless Bluetooth implementation; good sound quality

Low battery life with noise-cancelling enabled; dorky headband