Let me represent the Sennheiser PXC 550 review having had a chance to test it on my own. These are decent quality wireless headphones with a comfortable over ear design. Their stable fit and wireless option makes them a great device to carry out, use at the gym etc. A sufficient sound quality will suit both casual listeners and professionals. The above-average model is the product of a famous German trade mark founded in 1945 and having a great experience in audio techniques.
Sennheiser PXC 550 specs represent an impedance of 490 Ohm. The frequency response of this model is quite enough for a quality sound with 17Hz-23KHz. The sensitivity of 110 dB is quite strong for clear and loud audio reproduction. I should admit a great battery life of 20 hours and even 30 hours without noise cancelling. It takes just 3 hours to recharge it.
You may switch the sound profile up to your taste, however it may sound not the clearest way, but up to your wishes. The default sound profile reproduces a strong and punchy bass. The soundstage is not the widest for the closed cups type, but it is quite spacious for the design. The mids and highs are not drawn by the lows. The sound is engaging and transparent. It is neutral and not for bass heads.
The active noise cancelling provides a comfortable switch to adjust the level. It is not fatiguing for ears. It does not shut down the outer world at all, but it feels more comfortable for ears and enough for listening.
Sennheiser PXC 550 may be used with and without a wire. It comes with an audio and USB cable, ¼ adapter of 6.35 mm/0.25 in. The Bluetooth version is 4.2. The headphones support aptX.
Sennheiser PXC 550 is one of the most comfortable and stable headphones I’ve tested. They have an adjustable headband with quality metal frame and cups that swivel, lay flat and fold. All the materials look and feel premium. They are also very lightweight with 227 g/8 oz.