Focusrite ISA One Single Channel Mic Preamp & DI
The Focusrite ISA One delivers the legendary, transformer-based console sound of the original Focusrite Forte console in a rugged, portable desktop chassis. Built around the historic Lundahl LL1538 input transformer, this single-channel preamp provides up to of clean, transparent gain with unmistakable analog warmth. Perfect for project studios, voiceover artists, and mobile rigs, it features a completely independent DI channel.
Operating as two independent paths at once, the ISA One enables tracking a microphone through the transformer-balanced preamp while simultaneously routing a direct instrument signal through the DI channel.
The variable input impedance switch allows you select between four carefully calibrated preamp settings: Low, ISA 110 (classic console), Medium, and High. Changing how the microphone interacts with the preamp unlocks a vast palette of acoustic options from a single microphone without touching an EQ.
Key Features
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Lundahl LL1538 Input Transformer: The exact premium transformer used in the iconic ISA 110 modules, delivering legendary top-end air and rich low-end control.
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Dual-Path Architecture: Record microphone signals and DI instruments (guitar, bass, or keys) to separate DAW tracks simultaneously.
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Variable Input Impedance: Four settings to perfectly match or creatively mismatch your mic's output impedance for diverse sonic textures.
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Dedicated Insert Points: Balanced loop-send and return connections allow you to easily patch external hardware compressors or EQs before your converters.
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Comprehensive Level Metering: Features a classic, backlit moving-coil VU meter alongside a modern, fast-acting dual LED peak meter.
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High-Current Headphone Amp: Front-mounted stereo headphone output with dedicated volume control and an external cue mix input for latency-free monitoring.
Specifications
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Preamplifier Type: Solid State with Lundahl LL1538 Input Transformer
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Channel Count: 1x Microphone Channel + 1x Independent DI Channel
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Maximum Gain: Up to (Mic) / Up to (Instrument DI)
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Variable Impedance Settings: Low (), ISA 110 (), Medium (), High ()
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Analog Inputs: 1x XLR Microphone, 1x XLR Balanced Line, 1x TRS Balanced Line, 1x TS Instrument DI Input, 1x TS Thru
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Analog Outputs: 1x XLR Mic Output, 1x XLR DI Output, 1x TRS Main DI Output, 1x TRS Headphone Out
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Hardware Inserts: 1x TRS Send, 1x TRS Return (1/4" balanced)
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Optional Expansion: Supports Focusrite ISA One 24-bit/192kHz A-D converter card
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Chassis Format: Heavy-duty desktop steel enclosure with integrated carry handle
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FOC-ISA-ONE
Focusrite ISA One Single Channel Mic Preamp & DI
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