Whirlwind PA-1 Personal Headphone Monitor

PA-1 Personal Headphone Monitor from Whirlwind is a high-output, low-distortion, portable monitoring device with multiple inputs, so it can be used with a variety of headphone signal distribution systems and is suitable for critical listening in any professional audio environment. The PA-1 is a great choice for boosting weak headphone signals when working in a loud environment. It will accept balanced or unbalanced line-level stereo signals through a pair of 3-pin female XLR inputs or a single 1/4" TRS input, while 3.5mm and 1/4" outputs let you use any pair of headphones.