Mackie HM-4, 4-Way Headphone Amplifier

Descriptions Mackie HM-4, 4-Way Headphone Amplifier Mackie HM-4 features a 4-way headphone amplifier which is designed to provide simple and effective headphone amplification for arthritis, musicians and engineers monitoring through headphones in home, project, commercial and mobile-recording studios. The Mackie HM-4 has a single 1/4" TRS stereo input and four 1/4" TRS stereo outputs allow you to distribute a stereo source to up to four pairs of headphones. Each output of the Mackie HM-4 is controlled via a dedicated level knob, allowing varied listening volumes for each person. Also, the Mackie HM-4 has a compact heavy-gauge steel chassis offers rugged durability and a convenient power status indicator on its panel. Use the included 12 VDC power supply to power the HM-4 Mackie HM-4 Main Features Distribute a stereo input signal to up to four pairs of headphones Ideal for musicians in home and studio recording sessions One unbalanced 1/4" TRS stereo input Four unbalanced 1/4" TRS stereo headphone outputs Dedicated per-output level control allows each person to set a different listening volume Front-panel power status indicator Heavy-gauge steel chassis for long-lasting durability in the studio or on the road Includes 12 VDC power supply Specifications Number of Channels  4 Input Connections  1 x 1/4" TRS stereo (unbalanced) Output Connectors  4 x 1/4" TRS stereo (unbalanced) Input Impedance  10 kOhms Output Impedance  47 Ohms Maximum Output Level  +22 dB Function Controls  4 x volume controls Frequency Response  Not specified by manufacturer Power Requirement  12 VDC power supply Current Draw  <220 mA maximum Construction Material  Heavy-gauge steel chassis Dimensions (H x W x D)  2.0 x 4.3 x 2.3" / 51 x 109 x 58 mm Weight  0.5 lb / 0.2 kg