Talent HDA1 Four Output Stereo Headphone Amplifier Convenient way to let each performer control their own wired headphone mix Low-noise, high-output circuitry provides plenty of muscle to drive inefficient headphones RCA , 3.5 mm, and 1/4&quot; line level inputs, and stereo/monaural switch Four amplified 1/4&quot; headphone outputs, each with its own volume control Also handy in a pinch as an audio signal distribution amp or unbalanced line driver