Focusrite ISA One Portable Desktop Microphone Preamp

The Focusrite ISA One is a single-channel microphone preamplifier that utilizes a transformer-based design, drawing inspiration from the original ISA 110 preamp, which was integral to each channel of the renowned Forte console. This device showcases a classic vintage architecture and is equipped with the Lundahl L1538 transformer along with a custom Zobel network. In addition to its switchable input impedance options for the microphone preamp, the ISA One features a line input accessible via XLR and 1/4" TRS phone jacks. Furthermore, it includes an independent DI channel that offers a dedicated gain control, an active or passive impedance switch, a 1/4" TRS output for connecting to an amplifier, and a separate XLR output located at the rear.     The ISA One is equipped with an insert point, allowing for additional signal processing to be integrated between the preamp or DI and the optional analog-to-digital converter if necessary. The angled front panel also provides access to ph