Studio Bundle w/4) Rockville PRO-M50 SR Headphones+4 Channel Headphone Amplifier

Package Includes: (4) Rockville PRO-M50 SR Studio Headphones+Detachable Coil Cable+Case+Extra Ear Pad, (1) Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp Features of PRO-M50 SR: Rockville PRO-M50 SR Studio Headphones w/ Detachable Coil Cable, Case+Extra Ear Pad, Professional High-Definition Studio Headphones, 40mm Neodymium drivers, Ergonomically designed swivel ear cups, Supreme sound isolation, Accurate sound reproduction, Minimal bleed, Sturdy and durable steel headband and arms, Soft leather headband cover, Interchangeable leather and soft suede ear cups covers included Detachable 51" coil cable made of 100% Oxygen Free Copper (158" fully extended), Gold plated 3.5mm connector, Gold plated 1/4" adapter, Hard leather carrying case, Stainless steel headband frame and moving arms are durable and long-lasting. Specifications of PRO-M50 SR: Style: Closed-Back, Design: Circumaural, Transducer Type: Dynamic, Driver: 40MM, Sensitivity: 97+/-3dB, Impedance: 32ohm, Frequency Response:10Hz - 25KHz, Max. Power: 600MW, Rating Power: 260MW, Net Weight: 290g (with cable) Features of RHPA4: Rockville RHPA4 4-Channel Professional Headphone Amplifier, Inputs: 1/4" and 3.5 mm input, Stereo or Mono switch, We include (4) 1/4" TRS and (4) 3.5 mm headphone outputs run in parallel which means you can actually run 8 headphones (2 per channel), 4 Outputs each output has individual volume controls, Thick metal shell casing, High quality potentiometer knobs for each channel, Power "On" LED., DC 5V USB power supply has low power consumption BUS powered means you can get power to the unit from a power bank or through the USB on a computer or laptop, Rubber feet. Specifications of RHPA4: Input Impedance: 22K ohm, Max. Input Level: +22dB, Output Impedance: Min. 16Ohm, Max. Gain: 20dB/Channel, S/N Ratio: >98dB, Frequency Response: 20 - 20 kHz, S/N Ratio: > 90dB (ref 0dBu), THD: < 0.01%, Power supply: 5VDC, >=1000mA via USB Power Adaptor, Dimensions: 4.6" x 3" x 2.36", Weight: 0.85 Lbs, 0dBu = 0.775Vrms