Samson QH4 4-Channel Headphone Amplifier

The Samson QH4 is a 4-channel stereo headphone distribution amplifier for studios, podcasts and anywhere several people need to monitor the same source. It has two balanced 1/4-inch inputs for a mixer or interface, a stereo 1/8-inch aux input for phones and other line-level devices, and a 1/8-inch aux output for daisy-chaining more QH4 units. Four independent high-power channels drive headphones from 16 to 600 ohms (282 mW per side into 32 ohms), each with its own 1/4-inch output and volume control. Master volume, master mute and a global mono button let you check mono compatibility quickly. The frequency response is 17 Hz to 47 kHz (-3 dB), the noise floor is -114 dBu, and it runs from a 15 VDC adapter.