Focusrite ISA TWO. The ISA Two is a premium dual-mono microphone preamp designed for engineers and producers who demand exceptional sound quality from a compact rackmount unit. Featuring two channels of Focusrite’s legendary ISA mic preamp design, it provides pristine gain, flexible impedance options, and versatile connectivity for microphones, instruments, and line-level sources. Based on the acclaimed designs found in the Focusrite Forte and Studio Consoles, the ISA Two delivers the classic Focusrite sound with modern flexibility. Each channel features a Lundahl LL1538 input transformer, providing a smooth, detailed response with excellent clarity across a wide frequency range. With up to 80dB of clean, distortion-free gain, the ISA Two can handle everything from delicate vocal recordings to low-output microphones and demanding sources. Four selectable input impedance settings, including the original ISA 110 impedance, allow you to match the preamp to your microphone for optimal tone and performance. The ISA Two also includes front-panel instrument inputs, rear-panel line inputs, balanced inserts, a variable high-pass filter, and precision LED metering with user calibration for accurate level matching with converters and recording systems. Features Two independent channels of classic Focusrite ISA microphone preamp design Lundahl LL1538 input transformers for detailed, transparent sound Up to 80dB of clean microphone gain Four selectable input impedance settings, including ISA 110 mode Front-panel instrument inputs for direct recording without a DI box Rear-panel balanced line inputs and inserts Variable high-pass filter with 18dB/octave slope and 16Hz–420Hz range User-calibrated 8-LED metering for precise level monitoring Independent channel controls and routing
