The Focusrite ISA One Classic is a high-quality preamp designed for professional audio recording. This single-channel preamp is suitable for a variety of instruments and is particularly well-suited for use with microphones. With independent D.I., it is perfect for guitarists and bassists, too. This preamp is made by Focusrite, a company known for producing top-of-the-line audio equipment. It has zero-latency monitoring, meaning you can listen to your recordings while you record them without any delay. The ISA One Classic has a clean, transparent sound that will enhance the quality of your recordings.