The Advanced Technology Design Series Model 221 Power Amplifier by AB International is a high-quality 2-channel power amplifier designed for professional audio applications. With XLR audio inputs and outputs, this amplifier is suitable for connecting to a wide range of audio equipment. The sleek black design and rack-mountable feature make it easy to integrate into any audio setup. Built with AB amplifier class technology, this amplifier delivers reliable and powerful sound performance for musical instruments and audio gear. Has some scratches. This was used in a large church and was working when it was replaced with updated equipment.
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