Crafted with handpicked components for incredibly narrow tolerances, special acoustic materials and exceptional engineering, they deliver reference-class fidelity and a balanced sound with crisp bass, excellent mid frequency response and a gentle, pleasantly natural treble: the iconic, oval-shaped Sennheiser HD 650 are a true headphone classic by the leader in audio.
With the HD 650, Sennheiser created the first dynamic headphones to achieve such authentic and natural sound reproduction, both accurate and transparent. Manuel Ricke, Product Manager Audiophile at Sennheiser, explains how the headphones have been perfectly paired to the Apogee Groove headphone amp to bring their captivating sound to PCs and Macs: With more music stored on PC and Macs, the output of the computer can prove to be a bottleneck that limits the ability to deliver sufficient power to audiophile-grade headphone models. The HD 650 are excellent open, dynamic headphones. However, their high, 300-ohm impedance means they require more power than can usually be provided by a computer. Drawing on Apogee's 30-year pedigree as an innovator and industry leader in digital audio recording, the Groove amp increases the output signal to do full justice to the capabilities of the HD 650.
A headphone classic meets world-class digital audio expertise
The world's most successful artists, producers and audio engineers rely on Apogee gear to capture GRAMMY-winning recordings. The Apogee Groove headphone amp makes this recording studio technology available in a premium compact DAC and headphone amp, providing a simple yet powerful, take-anywhere solution. Groove is designed to deliver every sonic detail from streaming music services like Spotify, Apple Music, Tidal and Google Play Music and provides exceptional playback quality for high-res files like WAV, AIFF and FLAC. Groove's output provides ample power at any impedance for a punchy bass and stunningly clear mid and high frequencies. Its Constant Current Drive technology delivers a smooth frequency response with any headphones - with Apogee recommending Sennheiser headphones to the discerning listener. Groove also features Apogee's Quad Sum DAC design which utilizes four digital-to-analog converters per channel to achieve the highest dynamic range and lowest distortion (THD+N) of any device in its class.
The combination of Sennheiser's HD 650, the undisputed benchmark in headphones, with Apogee Groove's driving power and sonic excellence, is a match made in heaven , commented Betty Bennett, co-founder and CEO of Apogee Electronics.
The exceptional performance delivered by the new bundle is effortlessly easy to obtain - simply connect the Apogee Groove to a computer's USB port and the HD 650 to its audio output and you will enjoy a new standard in sound.
The bundle will be distributed exclusively via Sennheiser's online shop from the end of June.
About Apogee Electronics Apogee Electronics is an award-winning manufacturer of professional audio devices that advance audio recording and deliver ultimate sound quality, inspiring simplicity and incredible value. Apogee initially made its name with special anti-aliasing filters that solved many of the early problems associated with digital audio. Later, Apogee's complete conversion systems pushed the envelope of digital audio quality and established Apogee as a key innovator in the field of professional digital audio. Today, Apogee converters and audio interfaces are regarded as the reference standard in the audio industry. Products such as Symphony I/O, Big Ben, Ensemble and Duet all have set the benchmark by which digital audio recording hardware is judged. Now with its latest products JAM and MiC, designed especially for Apple's iPad, iPhone and GarageBand software, Apogee continues to be at the forefront of recording technology. Apogee's mission is to build products that offer ultimate sound quality, innovative design and unparalleled value to all music creators from the aspiring artist to the discerning audio professional. www.apogeedigital.com
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Crafted with handpicked components for incredibly narrow tolerances, special acoustic materials and exceptional engineering, they deliver reference-class fidelity and a balanced sound with crisp bass, excellent mid frequency response and a gentle, pleasantly natural treble: the iconic, oval-shaped Sennheiser HD 650 are a true headphone classic by the leader in audio. 
