Design and features:This headphones closed design and electronic noise canceling feature reduce both outside noise and sound leaking out into your environment. The headphones work with or without the noise canceling feature being turned on. You can use the noise-canceling feature without listening to music, and the audio cable can be detached to get it out of the way when the headphones are being used for noise reduction only. The headphones have low sensitivity regardless of whether the headphones are powered with the noise cancelation feature turned on or off, or used in passive (unpowered) mode; so while they can provide satisfying volume levels when used with home audio equipment and higher powered portable audio devices, they may not be a good match for lower-powered portables. The Opus has a volume control plus an integrated microphone and player function controls and integrated call connect/disconnect controls. Additional features include detachable audio cable. Earcups fold and swivel for ease of carrying and storage. Free Razer Opus app download for Apple and Android mobile devices adds additional features. None Has power on/off and Bluetooth connect/disconnect, ambient mode/ANC mode alert tones, and low battery alert. Supports Google Assistant and Apple Siri digital assistant voice commands when used with Bluetooth devices that have those features. Bluetooth connected Apple mobile devices using iOS Version 5 and above will show the battery level. Has automatic pause feature - pauses audio when the headphones are taken off, audio automatically restarts when the headphones are placed back on the head. The free Razer Opus app download for Apple and Android mobile devices can be used to change between preset and custom EQ settings, disable the auto pause feature, and customize or disable the automatic shut-off function. This model comes with Detachable 45-inch long standard audio cable, USB-C to USB-C charging cable, USB A to Type C adapter, mini-plug-to-airplane-jack adapter, carrying case.
Sound quality: We found the Opus delivers sound quality that falls in the very good range - it reproduces music and voice very well although it does have some noticeable sonic quirks and excellent active noise reduction. With the noise cancelling mode engaged and the Razer Opus app Equalizer set to the THX mode (as received state of the headphone) the bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is a bit prominent and boomy. The midrange (voices, guitars, horns, etc.) is even, but is somewhat grainy and a touch hazy and etched (a bit more sharply outlined then it should be). The treble (cymbals, the upper range of violins, etc.) is extended, but is slightly smeared (sounds that should have a delicate shimmer sound blurred) and sizzly (sounds that should have a delicate shimmer have a sound reminiscent of bacon frying) and the upper treble is a bit subdued. Does a decent job of recovering room ambience (the sense of the acoustic space in which the audio program that's being listened to was recorded), but the sound lacks liveliness and it is a bit closed (sound-wise it's fairly obvious you have something plugging your ears). Mixed character - warm bass with neutral midrange and treble. The overall sound can best be summarized as somewhat grainy and a bit bassy. The tone settings of the app do have a noticeable effect on the sound of these headphones. When battery power is turned on while cord connected to AC powered devices this model may produce a noticable humming and/or hissing noise. Noise Canceling: Excellent noise reduction across the entire frequency range with the low frequencies reduced the most. A very faint rushing can be heard when there is no audio program to drown it out.
Comfort: We found that these headphones produce a sense of moderate pressure around the ears. As typical of over-ear models the ear pads might feel hot and/or sticky after prolonged use. Users with larger ears might find that the over-the-ear fit of the ear pads feel cramped, or that the ear pads sit on, rather than around their ears; in that case the less-than-ideal fit around the ears might interfere with the earpad seal and reduce the noise reduction capabilities of the headphone. Users with larger heads might find that the headband does not have enough adjustment range to allow the earcups rest properly on the ears and/or that the headband presses uncomfortably on the top of the head. Some users may find that when they lean far forward the headphones feel unstable and shift forward, but not to the point of falling off. When wearing this model while walking the muffled vibrations from each foot step can be heard through the headphones. When the audio cord is used the sound of it rubbing on clothing may be faintly heard through the headphones.
