The new Sennheiser PC 350 is a closed type, circumaural PC headset for gamers. It features a superior passive attenuation (up to 32 dB) of ambient noise with its large size and comfortable ear cups designed for long gaming sessions along with a large microphone to cancel out outside noise. The PC 350 is equipped with volume control and microphone mute function. Also for easy transport the headset is collapsible and connects to any sound card. Sennheiser's PC 350 is available for purchase immediately and is priced at £149.99.

Shown off at the CES in Las Vegas, the Sennheiser CX 6 Travel are chic black and silver earphones with a high degree of passive attenuation in a compact ear-canal headphone, especially designed to guarantee your listening enjoyment on planes and trains.

The CX 6 Travel headphones come with a cable clip, a hard transport case, adapter rings in S, M and L sizes and a double mono adapter. This adapter changes the CX 6 Travel’s impedance, which needs to be considerably higher for in-flight entertainment systems than for mobile players.

No price disclosed yet but the Sennheiser CX 6 Travel will be available in stores from March 2008.

Sennheiser is launching a new series of professional ear-canal headphones. Including IE 6, IE 7 and IE 8 (pictured above), the IE series released at the CES offers a great attenuation of exterior noises along with a good sound quality.

This series has dynamic transducers that cover the entire frequency range, this means distortion is minimal, even with high sound pressure levels. They come with ear adapters in different sizes to ensure the IE headphones fit your ear canal perfectly and a carrying case also includes a small cleaning tool and a cable clip.

All the models in the IE range are remarkable because of their robust and functional design. The cables are strengthened with Kevlar and the headphones are made from durable materials. The IE 6 and IE 7 ear-canal headphones will be in stores from March 2008 and the IE 8 from April 2008.

Sennheiser goes on Kleer's wireless transmission technology which has been shown promise in terms of both energy efficiency and sound quality when compared to Bluetooth. The MX W1 stereo headphones combine the new digital transmission technology with high-quality dynamic systems and Sennheiser’s twist-to-fit system that keeps earphones securely and comfortably in your ear.

"The transmitter is only the size of a matchbox and transmits CD quality music", said Product Manager Sven Wilhelmsen, also Kleer products are fully compatible with one another. For example, an MP3 player with Kleer technology can transmit straight to our earphones without to add the MX W1 transmitter between.

The MX W1 will be available from May 2008 and from Engadget we know the price should be something like $600.

Sennheiser has partnered with the Susan G. Komen foundation to support breast cancer research. Started from December 1st until the end of May 2008, the CX300 stereo ear-canal headphones goes pink bubblegum colored and will be available at $89.95 through select retailers with 10% of the MSRP ($9.99) going to the charity. Sennheiser has also guaranteed a minimum donation of $15,000.

The CX300P comes with ear adapters in three different sizes to ensure a perfect fit and an excellent attenuation of ambient noise, an asymmetrical cable and a 2-year warranty.

Sennheiser announced an updated version of the HD25-SP. These closed dynamic headphones are perfect for monitoring, recording and outdoor applications. They are also a lower-cost alternative to the HD25-1 II and they should cost approximately $100.

The HD25-SP II is only shipped with a 3.5mm to 6.3mm adapter stereo jack plug and 3 meters OFC cable. However the specifications are not in rest because the HD25-SP II boasts an impedance of 60Ω, a sensitivity of 114dB and a frequency response of 30Hz ~ 16kHz for a distortion factor of 0.5% or less which are not bad for a $100 headphones.

The Sennheiser HD25-1 II will be an improved version of the previous model HD25-1. These headphones belong to the "Closed Dynamic" family still adopt the double arm and weight approximately 140g (without cable), as for the price, it has reached $200.

The HD25-1 II is bundled with 2 different sized ear pads, 1.5 meters steel cable and a 3.5mm to 6.3mm adapter stereo jack plug. Note that almost all parts including ear pads, cable, ear cups, and headband pads are replaceable.

And for the technical specifications the HD25-1 II has an impedance of 70Ω, a sensitivity of 120dB and a frequency response of 16Hz ~ 22kHz for a distortion factor of 0.5% or less.