Focusrite ISA ONE ANALOGUE. The ISA One brings Focusrite’s legendary ISA Series microphone preamp design into a rugged, portable chassis, offering exceptional recording quality in a compact format. Built around the same transformer-based technology found in Focusrite’s renowned studio consoles, ISA One delivers clean, detailed, and versatile preamp performance for engineers, musicians, and mobile recording setups. Featuring a high-quality Lundahl transformer-based mic preamp, ISA One provides up to 80dB of gain with ultra-low noise and exceptional clarity. Four selectable input impedance settings, including the original ISA 110 setting, allow you to optimize the preamp’s response for a wide range of microphones. The independent D.I. channel makes ISA One equally suited for guitar and bass recording, offering dedicated gain control, an amplifier output, rear-panel XLR output, and optional converter routing. A dedicated insert point allows external processing such as EQs and compressors to be placed directly into the signal path before conversion. Designed for both studio and live applications, ISA One includes a headphone amplifier with selectable monitoring options, cue mix inputs, precision analogue metering, and extensive connectivity in a portable desktop enclosure. Features Classic transformer-based Focusrite ISA microphone preamp design Rugged and portable desktop chassis Up to 80dB of clean microphone gain Four selectable input impedance settings: Low: 600Ω ISA 110: 1.4kΩ Medium: 2.4kΩ High: 6.8kΩ Independent D.I. channel with dedicated gain control D.I. output and amplifier through output Front-panel instrument input for direct guitar and bass recording Dedicated insert point for external processing Variable 18dB/octave high-pass filter at 75Hz Headphone output with independent volume control Stereo cue mix inputs for monitoring playback sources Precision moving-coil VU meter and LED peak metering Optional ADC expansion compatibility Connectivity Inputs Microphone input: XLR Line inputs: XLR and TRS Instrument input: TRS External ADC input: TRS Insert return: TRS Stereo cue mix inputs: Dual TRS Outputs Balanced line output: XLR D.I. output: XLR D.I. through output: TS jack Insert send: TRS Headphone output: 1/4" TRS Technical Specifications Mic gain range: 0dB to 60dB in 10dB steps + 20dB variable gain Instrument gain range: +10dB to +40dB continuously variable Equivalent input noise: -126dB (60dB gain) THD: 0.0009% at medium gain Frequency response: Mic input: 10Hz–125kHz Line input: 10Hz–200kHz High-pass filter: 18dB/octave, 75Hz Weight: 3.9kg (8.6lbs) Dimensions 220mm (W) x 104mm (H) x 254–290mm (D)8.66" (W) x 4.1" (H) x 10–11.4" (D)
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