Who hasn't heard of the Sennheiser brand? Stand up so we can see you, as you would seriously be one of a kind. Especially if you're into any kind of multimedia or audio, you would have definitely held, heard, or seen Sennheiser headphones. The brand is now resolutely in India, and gung-ho about promoting its products.
As for the noise cancellation game, Sennheiser has led tournaments and won them in some cases. This new offering, the PXC 350, is a notch below the ultra high-end PXC 450 that we reviewed some time ago. But it sure looks as good and worthwhile as the rest. Its actual effectiveness is what I intend to check, and tell you about. So read on.
Design
Open the gray box and you get a plastic mold holding the cans firmly in place, along with a black carry case bearing a Sennheiser leather patch in the center. A compact and easy-to-read manual is included, besides converters for different applications. Black is the predominant color. Hard plastic forms the outer covering for the drivers and headphone, while a soft black cushion lines the inner surface of the band and form comfortable ear pads for the large oval cans.
The left and right ear cups both have slots for battery insertion, so that's a first. The active NoiseGard circuit on the left cup gets activated by an on/off slider switch placed on the bottom. When slid on, a small red LED is exposed. Such are the small design fancies that impress in their own way.
NoiseGard is a proprietary name given to the same technology that all these headphones use. Basically, sound up to 1 kHz is filtered out by an out-of-phase wave generated by the circuit. The reference for this wave is the background noise around your ears, which is picked up by mics in the circuit.
Sounds fancy? You bet, but this same technology has certain drawbacks, which I will mention only if I encounter them in the course of my test.
Cheaper models just don’t seem to get it right, but that is another story – Sennheiser prices are not low. To quickly run through the specs: this is your basic dynamic transducer type, with a closed-back, circumaural design. The rated frequency response is quite vast at 8-28,000 Hz, though 108 dB SPL for the sound power sounds good. The amp THD is at 0.10% which seems quite high, but other brands do not even provide this rating, which should give you a taste of Sennheiser’s professionalism.
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