Focusrite ISA-ONE Portable Desktop Microphone Preamp

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 40 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.

Whether you're an artist, engineer or producer, you'll appreciate the versatility of the ISA One, with its front-panel DI input. The DI includes low/high impedance switching and an amplifier output, and its own feed to the optional A/D converter and separate rear-panel XLR output.

General Features:

• ISA series transformer-based preamplifier — Encased in a rugged and portable chassis, ISA One offers the classic Focusrite microphone preamplifier at its lowest cost to date.
• Flexible independent DI channel — ISA One is ideal for both engineers and demanding performers alike, featuring front-panel inputs with High (2.4 MΩ) and 
• Low (470 kΩ) impedance settings, independent gain control, an output for routing to an amp, an independent XLR output on the rear, and routing to the optional A-D converter.
• Switchable impedance — Choose one of four carefully selected input impedances, including the original ISA110 setting, to suit any microphone.
• Headphone output with volume control — ISA One can feed either a sum of the two input to the headphones output, or an external stereo cue mix (such as a stereo feed from an interface) via two TRS jack inputs on the rear of the unit.
• Dedicated insert point — Allows you to place extra processing between the preamplifier or DI and the optional converter, such as an EQ or compressor.
• Optional stereo 192kHz A-D converter — You can chose to upgrade your unit with an optional digital card that delivers the best A-D performance in its class (dynamic range of 118dB). Alternatively, the ISA One Digital comes with the A-D converter as standard.
• Lundahl LL1538 Input Transformer — The original mic transformer used in the original Red modules helps to provide the unique sound and performance of this groundbreaking design.
• Backlit VU meter with variable calibration — ISA One has a moving coil VU meter with variable calibration to suit analogue and digital recording media, alongside two six-LED peak meters; inputs can be metered either pre- or post-insert.

Warning:
This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.