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Nady HPA-4 4 Channel Headphone Amp With extensive switching functions, extreme efficiency, and unmatched sound quality, the ultra-versatile HPA-4 is a universal 4-channel multi-purpose headphone amplifier/line distribution system — perfect for the most demanding professional stage and studio applications. Four totally independent stereo high-power headphone amplifier/line distribution channels in a convenient single rack package — an ingenious, easy-to-operate unit allowing a maximum variety of both useful monitoring and stereo line level signal distribution options. Input Source Select switches and Phone and Line 1/4" TRS stereo outputs on each channel, and 4 independent stereo input sections (each with servo-balanced L & R 1/4"TRS jacks) enable independent selection of any of the 4 stereo signals for each headphone amp/line distribution channel. This allows selecting from up to 4 completely independent monitor signals for each set of headphones connected to the HPA-4 for optimum monitor-ing flexibility or 4 separate choices for each channel's Line Output for enabling many useful, simple audio switching/routing solutions. Separate Volume control for each channel adjusts the level to both Phone and parallel Line outputs Easily expandable for optimum versatility in any application — up to four HPA-4's can be daisy chained for additional fully selectable headphone/line distribution requirements No-compromise circuit design, strin-gently selected tight-tolerance components and low-noise, extremely linear or amps for ref-erence-quality, transparent audio with maximum headroom even at extremely high head-phone volume levels High-quality, rugged construction for maximum reliability Shielded internal dual regulated power supply with ~115V(60Hz)/~230V(50Hz) select switch and fused IEC power cord connector Dimensions and weight: 1.75"X 19"X 8.5"(44.5X482.6X217mm), 6.93lbs (3.15Kg)
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