Focusrite ISAOne High Grade Mic Preamp


The Focusrite ISAONE is a high grade microphone pre-amp with a flexible indpendaend DI channel and optional A/D conversion. Designed to deliver amazing clarity and warmth, and supporting a range of signal types including mic, line, and more. Perfect for professional studio environments.

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Featuring a rugged, portable all-metal enclosure, the ISA One combines the classic Focusrite microphone preamp with a flexible, independent DI channel and optional 192kHz precision A/D conversion.

At the heart of the ISA range is the microphone preamplifier with its Lundahl input transformer – essentially the same circuit, based on the original ISA110, that has been used for 30 years in successive Focusrite designs. The input transformer imparts a special character to the sound that can’t be truly emulated in any other way: inseparable from the microphone itself, the transformer input stage is ideal for use with classic microphones. But this mic pre has a twist the original didn’t have, which makes it far more versatile: four carefully-selected impedances allow you to match microphone to input in different ways. Bring out the character of a classic mic or emphasise a special feature, or go for a totally transparent, modern sound – it’s up to you.

  • ISA series transformer-based preamp
  • Optional 192kHz A/D converter
  • Flexible independent DI channel
  • Headphone output with volume control
  • Supports instrument, and line inputs
  • Dedicated insert point
  • Switchable impedance (low, ISA110, med, high)
  • Backlit VU meter with variable calibration
  • Lundahl LL1538 mic input transformers


Preamp Type Solid State
Number of Channels 1
Frequency Response 10Hz-125kHz
Phantom Power Yes
Analog Inputs 1 x XLR (Mic), 1 x XLR (Line), 1 x 1/4″ (Line), 1 x 1/4″ (DI), 1 x 1/4″ (Amp
Analog Outputs 1 x XLR (Main), 1 x XLR (DI), 2 x 1/4″ (Cue Mic R/L), 1 x 1/4″ (Headphone)
Dimensions 220 x 104 x 254 mm
Weight 3.9 kg
For more information, please visit the manufacturer's website.