Powers on . Untested The Roland GP-8 Multi-Effects Rack Processor is a versatile device that offers a range of chorus, delay, and reverb effects for enhancing your audio. With a frequency range of 20Hz to 20kHz and a maximum sampling rate of 44.1 kHz, this digital processor delivers high-quality sound. It features 6 input/output ports including 1/4" send, TS in and out, MIDI in, and a 1U rack unit height, making it easy to integrate into your setup. The GP-8 also offers 32 presets and is designed by the renowned brand Roland, known for their reliable and innovative audio equipment.nt