The HD661 is a closed-back, circumaural headphone which is excellent for live sound monitoring application because of its sound profile of depth of sound field. It's also suitable for studio and broadcast. Although suitable for a very wide range of applications, the exceptional attenuation of external noise of the HD 661 makes it particularly useful for use in a high noise environment.
The balanced, high definition and clear sound of the HD661 assures that a professional sound engineer can have full confidence when recording or monitoring. Its patented sturdy headband structure provides long-lasting durability even in challenging conditions, yet its light weight and optimized mechanical pressure provides long-term wearing comfort.
General Features
• Exceptional design of depth of sound field and excellent for live sound monitoring application
• Dynamic, closed-back circumaural headphones
• High noise attenuation
• Ø40 mm high resolution drivers
• Precision tuned acoustic chamber
• Patented self-adjusting headband for great fit and maximum comfort
• Rotating ear pad construction for convenient single-ear monitoring
• Detachable, single side cable
• Light weight
Both the HD661 and MDR-7506 have a similar frequency curve. The HD661 delivers a wide dynamic range and high resolution sound, presenting the crystal clear audio details demanded by professional users.
Specifications
Type：Dynamic, closed-back
Driver：Ø40mm, neodymium
Sensitivity：102 dB SPL（1 mW）
Frequency Response：10-20,000 Hz
Max. Input Power：200 mW
Rated Impedance：68Ω（Copper-coated aluminum wire）
Ear Pads：Leatherette
Cables：1-meter（3.3 ft.）& 3-meter（9.8ft.）straight, single-sided；plugin cable on headphones（mini stereo connector）
Connector：Gold plated stereo mini plug
Headphone Caliper Pressure：Approx. 4.5 N
Net Weight（without cable）：190g（6.7 oz）