HIFIMAN EF100 + Beyerdynamic DT 990 Premium 250 Ohms

General Features:

• Premium audiophile hybrid vacuum tube headphone amplifier
• Features 3 independent amplifier sections:
• Vacuum tube input stage that functions as a preamp
• Class AB headphone amplifier
• Class T speaker power amplifier
• Listen through your favorite headphones or a pair of speakers
• Integrated 3.5mm, stereo RCA and type B USB inputs
• USB input and built-in DAC allow you to stream CD quality music from your computer
• Full size front stereo headphone output
• Binding post speaker connectors
• Vacuum tube input stage brings warmth, detail and spaciousness to your music
• Utilizes a single 6N3J dual triode vacuum tube input stage
• High output headphone amplifier designed for use with high performance headphones like the HiFiMAN HE-560 and HiFiMAN HE-6
• Class AB solid state design
• Output Impedance: 32-300 ohm
• Output at 32 ohm: 7.8V, 2W
• Signal-to-Noise Ratio: 95dB
• Frequency Response: 20-20,000 Hz
• Drives speakers with moderate to high efficiency levels
• Class T solid state design
• Power Output: 4.5W x 2 into 4 ohm
• Frequency Response: 20-20,000 Hz
• Dimensions: 7-7/8"W x 10-3/4"D x 3-3/4"H
• Authorized Internet Dealer
• 1-year Manufacturer's Warranty

Note: HiFiMAN products can only be shipped to customers in the United States

Also found as: EF100

• Open-back vents permit air to be moved freely by drives to create a rich and natural sound
• Durable and comfortable hand-crafted headband pad construction
• Single-sided cable reduces clutter
• Precise sound location creates a convincing atmosphere
• Gold-plated 1/8" mini stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)

• Powerful dynamic drivers
• Open-back earpieces allow air movement and add natural contours
• Frequency response: 5 - 35,000Hz
• Nominal impedance: 250 Ohm
• Sensitivity: 96 dB
• THD: <0.2%
• Power handling capacity: 100mW
• Circumaural, over-ear design for superior sound isolation
• 9' - 10-1/9" straight cable connection
• Gold-plated 1/8" mini stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)
• Authorized Internet Dealer
• 2-Year Manufacturer's Warranty
• Part Number: 481807