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Pricing and availability
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Based on price data from 6 merchants for "Focusrite ISA One". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Introducing the Focusrite ISA One, a portable powerhouse that brings the illustrious legacy of the Forte console to your fingertips. This preamp is a faithful recreation of the original ISA 110 architecture, including the celebrated Lundahl L1538 transformer and bespoke Zobel network. It offers you the unrivaled quality of the classic Forte console in a compact, portable format.
Whether you're recording in a studio or on the go, the ISA One's multiple inputs for microphone-, line-, and instrument-level sources have got you covered. One of its standout features is the variable impedance selector, allowing you to fine-tune the response to suit your needs. Add to this, the parallel-running instrument- and microphone-level inputs, and you have the freedom to blend direct signals to achieve your desired sound.
Key Features:
- Portable ISA preamp based on the revered Forte console design
- Switchable impedance to suit a variety of microphones
- Versatile input options: microphone, line, and direct instrument
- Parallel-running mic and instrument inputs for blending direct signals
- VU meter and ladder LEDs for visual monitoring
- Cue mix stereo inputs for additional connectivity
- Optional 24-bit/192kHz A-to-D converter
- Free Brainworx bx_console re-creation of Focusrite's ISA 110 and ISA 130 modules
- 3-year warranty
Owner's manual
Focusrite ISA One User ManualProduct specs
| Preamp Type | Solid State |
| Number of Channels | 1 |
| 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) |
| Frequency Response | 10Hz-125kHz |
| Height | 4.1"" |
| Depth | 11.4" |
| Width | 8.66" |
| Weight | 8.6 lbs. |
FAQs
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What type of preamp is the Focusrite ISA One?
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The Focusrite ISA One is a solid state preamp, offering a clean and transparent sound ideal for capturing detailed audio.
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Does the Focusrite ISA One provide phantom power for condenser microphones?
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Yes, the Focusrite ISA One includes phantom power, making it suitable for use with condenser microphones.
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How many channels does the Focusrite ISA One preamp have?
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The Focusrite ISA One is a single-channel preamp, designed for individual microphone or instrument inputs.
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What kind of inputs does the Focusrite ISA One support?
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The Focusrite ISA One supports multiple inputs including XLR for mic and line, 1/4" for line and DI, and 1/4" for amp connections.
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Is the Focusrite ISA One suitable for portable use?
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Yes, the Focusrite ISA One is designed as a portable desktop microphone preamp, making it convenient for mobile recording setups.
Videos
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Reviews
PROS
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Excellent noise threshold, recording clarity, and presence
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Offers warmth and granular control over amplitude level
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Versatile, combining DI and preamp, suitable for various instruments
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Enhances detail and clarity without excessive EQ
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Crystal clear sound, does not color the original tone
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Built like a tank, durable and reliable
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Adjustable impedance for custom tailoring microphone sound
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Separate DI section allows simultaneous use with preamp
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Imparts a professional sound quality to recordings
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Some models add brightness around 5k-6k range, enhancing certain mics
CONS
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Too clean for some, lacking desired saturation for specific tastes
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Bulkier size compared to competitors, challenging to stack or place
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Plastic buttons may feel cheap to some users
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Limited to one channel, which might restrict stereo recording setups
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Focusrite ISA One.
Features and functionality
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The leftmost switch is for preamp impedance selection, affecting the main out, and the DI operates independently with its own output.
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The gain control for the DI is located between the Hi-z/Lo-z switch and the input/through jack.
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The ISA One can be used with the Scarlett 2i2 by setting the channel to line level and keeping the gain down to avoid signal overload.
Source
User experience
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The ISA One is noted for its remarkably clean preamp sound when levels are properly adjusted, eliminating distortion issues.
Source
Software and compatibility
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The ISA One's digital option card is incompatible with the Scarlett 2i2, requiring a different interface like the Scarlett 6i6 for proper integration.
Source
Critic Reviews
5.0 out of 5
Based on 2 Reviews and 21 Ratings
111
Clean and natural sounding preamp
I used this preamp with a Neumann TLM 102 to record all of the vocals for my solo debut album entitled "Favorite Life", which is available on streaming platforms. I think it helps my vocals to sound full, clean, and natural. I now use it with a Neumann u87 Ai.
173
Simply great
I love this really massive pre-amp machine. you can hear really good sound quality. ISA One have few simple settings and is really easy to find your personal settings. I recommend highly for lead vocals, saxophone and violins
Artist usage
Add artist
In this photo of Mac in his studio, a Focusrite ISA One Mic Preamp can be seen on the table next to his monitor.
At 5:48 minute mark, Dines praised the Focusrite ISA One preamp. He mostly uses it for vocals, because of "transparency".
In this user-uploaded photo, Lil Peep is seen using a Focusrite ISA One preamp. Fans recognize the setting as the recording space for his "Hellboy" mixtape, known for its clean and beautifully layered sound. The Focusrite ISA One is renowned for its outstanding audio quality, contributing significantly to the mixtape's production.
In an interview with Ultimate Guitar, Rome Ramirez mentions that the Focusrite ISA One is his most valued piece of studio gear.
Nate writes on his website that he uses the following as his pre-amp.
Posted on IG by Jay Som, March 15, 2018.
Emilie posted a picture of the Focusrite ISA One with the caption:
"My headphones smell like coconut oil, frankincense, and grapefruit. #asylumaudiobook In other news, this is the last audiobook I will ever edit. Never again."
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Jacob talks about using a Focusrite ISA One in his Instagram post.
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Album Usage
The Focusrite ISA One has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Focusrite ISA One, it is most commonly used with the following gear.
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