The black Crusher Over-Ear Headphones from Skullcandy feature an active bass boost amplifier built into the earcups that provides adjustable bass control over your music. The over-ear earcups house both bass extension and standard drivers within acoustical porting that is designed to increase bass response and reduce distortion.

The built-in amplifier is powered by a single AA battery for up to 40 hours of playback and features an Auto On/Off Smart Circuit that automatically turns the amp off when you unplug your headphones or when no audio is sensed for 10 seconds. The headphones themselves have an ergonomic design and leather ear pillows for comfort during extended listening sessions. The in-line single-button remote and mic allow you to control playback and take calls. You can fold the Crushers for storage in the included microfiber travel bag.

Audio
Sensation55 Driver: This bass extension driver delivers a realistic bass experience that transforms your audio into bass you can feel
REX40 Driver: The custom-tuned REX40 driver is designed from the ground up by Skullcandy's audio engineering team to deliver a smooth frequency response with minimal distortion - tuned for your playlist
Acoustical Porting: Within the construction of the earcup, the specially designed acoustical porting allows both drivers to move freely, increasing the bass and reducing distortion
Engineering
Built-In Amplifier: The new Crusher draws its power from a premium battery (AA) powered amp hidden in the earcup
Adjustable Bass Control: The bass sensation slider on the left earcup allows you to adjust the sensation levels to your preference or playlist. If you prefer, turn the vibes off completely. You'll still enjoy the REX40 driver's acoustics, minus the powered bass boost
Auto On/Off Smart Circuit
No power switch needed. When your music stops or the headphone is unplugged from a source during play, the amp will power off within 10 seconds. Once the music source is restored, the amp will automatically power up