Recording Bundle w/ (4) Earphones+Four-Channel Amp

Bundle Contains: (4) RockvilIe PRO-M50 Studio Earphones w/ Detachable Coil Cable, Case+Extra Cushion. (1) RockvilIe RHPA4 4-Channel High-Quality Headphone Amplifier. Includes: Pro-m50 earphones. Removable cord. Comfortable velvet and leather pads (interchangeable). Protective hard travel case. Gold plated connector. Attributes: RockvilIe PRO-M50 Recording Headphones w/ Removable Coil Cord, Carrying Case+Extra Ear Pad. Professional High-Definition Recording Earphones 40mm Neodymium drivers. Comfortably designed swivel ear cups. Supreme audio isolation. Accurate sound reproduction. Minimal spillage. Sturdy and Durable steel headband and arms. Comfortable pleather band cover. Replaceable pleather and velvet ear cups covers included. Detachable 51 spiral cord made of 100% Oxygen-Free (158 when extended). Gold-plated 3.5mm adapter. Gold plated connector. Hard leather carrying case Stainless steel headband frame and moving arms are long-lasting and sturdy. Details: Type: Closed-Back. Design: Around-Ear. Transducer Type: Dynamic. Driver Unit: 40MM. Sound Levels: 973dB. Resistance: 32ohm. Sound Range:10Hz – 25KHz. Max. Power: 600MW. Nominal Power: 260MW. Net Weight: 290g (with cable). Contains: Earphone amplifier. Charging cord and adaptor. Manual. Warranty card. Uses: Recording studio. Podcasting. Music groups. Plus more!. Features: RockvilIe RHPA4 Four-Channel High-Quality Headphone Amp. Input Types: and 3.5 mm input. Stereophonic or Monophonic changer. We provide (4) TRS and (4) 3.5 mm headphone outputs in parallel which means you can literally run 8 headphones (2 each channel). 4 Outputs, each jack has individual volume knobs. Sturdy metal shell. High quality potentiometer knobs for every channel. LED power indicator. DC 5V USB power supply with low power consumption BUS powered mode means you can draw energy to the device from a portable charger or through the USB on a computer or notebook. Non-slip base. Specifications: Input Impedance: 22K ohm. Max. Input Level: +22dB. Output Impedance: Min. 16Ohm. Maximum Gain: 20dB/each channel. S/N Ratio: >98dB. Sound Range: 20 – 20 kHz. S/N Ratio: > 90dB (reference 0dBu). THD: =1000mA via USB Power Adaptor. Dimensions: 4.6 x 3 x 2.36. Heaviness: 0.85 Lbs. 0dBu = 0.775Vrms