The OMNITRONIC LH-030 is a four-channel headphone distribution amplifier that routes one stereo audio source to four headphone outputs. Each channel provides an independent level control and uses a 6.3 mm stereo jack. The unit has a 20 Hz–20 kHz frequency range, greater than 90 dB signal-to-noise ratio, less than 0.008% THD at 1 kHz, 20 dB gain, and a 51-ohm output impedance. It measures 11.3 × 7.3 × 4 cm and weighs 0.58 kg.