ISA C8X

ISA

Choose your ISA

  • ISA preamps

    ISA preamps

    Choose one, two, four or eight channels of heritage ISA sound — engineered to last.
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  • ISA audio interface

    ISA audio interface

    ISA C8X is a modern USB-C audio interface built with deeply musical, Lundahl transformer-based preamps.
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  • ISA ADN cards

    ISA ADN cards

    Expand selected ISA preamps with ADAT, Dante, and AES3 digital connectivity via optional ADN expansion cards.
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Focusrite ISA C8X Focusrite ISA C8X Back

ISA C8X

26-in, 28-out USB-C audio interface with eight preamps, including two ISA transformer mic preamps
R$20180 - R$20860
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ISA in a rack

40 years of ISA

In 1985, Rupert Neve designed a mic preamp for Sir George Martin. That circuit became the foundation for every ISA product made ever since. From the Forte console to today’s standalone preamps and the ISA C8X audio interface, the same Lundahl LL1538 transformer and design philosophy runs through it all.
  • Rupert Neve

    1985

    The first request

    Sir George Martin commissioned Rupert Neve to build a no-compromise mic preamp. The result, the Input Signal Amplifier 110, which set a new benchmark for warmth and musicality.
  • Focusrite Forte Console

    1988

    The Focusrite Forte Console

    Designed to be the ultimate studio console, the Forte used the finest components and became a symbol of engineering excellence.
  • Phil Dudderidge

    1990

    The Focusrite Studio Console

    After acquiring Focusrite, Phil Dudderidge built the ISA 110 and 130 modules into the Focusrite Studio Console — acclaimed to this day for its warmth and depth. Only ten were made.
  • ISA C8X

    Present

    ISA today

    What began as a console is now a range of standalone preamps and the ISA C8X audio interface. The same transformers and design, evolved for how studios work today.
The Story of Focusrite ISA

The Lundahl LL1538

The same Lundahl LL1538 chosen by Rupert Neve in 1985 sits at the heart of every ISA preamp, bringing warm, open, and detailed character to any signal.

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The Story of Focusrite ISA

The Story of ISA

From the ISA 110 in 1985 to the Forte console, the Focusrite Studio Console, and the standalone preamps trusted in professional studios today: 40 years of engineering, captured in one documentary.
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Session logs

  • Steph Marziano

    Steph Marziano

    Hayley Williams, Sir Chloe, Vundabar, Cassandra Jenkins

    “Punchy and musical without any effort from me. I've been using them on my drums and it's making them sing in a way they never have before.”

    Explore ISA 428 MkII
  • Riccardo 'Ricky' Damian

    Riccardo 'Ricky' Damian

    Mark Ronson, Sampha, Jorja Smith, Yebba

    “One of the most versatile preamps on the market. I carry it for mobile sessions and residencies — the perfect pairing for any producer wanting to expand their setup.”

    Explore ISA 828 MkII
  • Catherine J Marks

    Catherine J Marks

    boygenius, Wolf Alice, PJ Harvey, St. Vincent

    “ISA has become a fundamental part of my setup... eight high-quality preamps that give me flexibility without compromising on sound.”

    Explore ISA 828 MkII
  • James Rand

    James Rand

    Sega Bodega, Shygirl, COBRAH, LSDXOXO

    “Everything sounds like the best version of itself. I love the switchable input impedances with my synths, and there's a subtle low-mid curve that just sounds great.”

    Explore ISA 828 MkII
  • Jess Camilleri

    Jess Camilleri

    Mahalia, Eliza Oakes, Invariance

    “The ISA sits in a really nice space between 'clean' and 'colourful' — high enough specification for when fidelity matters, yet never cold or clinical.”

    Explore ISA 828 MkII
  • Chris Kalcov

    Chris Kalcov

    BBC, English National Opera, National Theatre Live

    “The ISA sits somewhere between clean and colourful — a slightly larger-than-life quality that carries real gravitas. It consistently proves popular with voiceover artists.”

    Explore ISA One
Steph Marziano

Always on, always ready

Watch Grammy-nominated songwriter and producer Steph Marziano talk about how the ISA 428 MkII became the backbone of her studio and why the demo is usually the final take.
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Riccardo 'Ricky' Damian

The rig that goes everywhere

Learn about producer and engineer Ricky Damian’s portable, ISA-centred rig he’s trusted for over a decade working with Mark Ronson, Sampha, Jorja Smith, and more.
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Classic sound in digital form

Classic sound in digital form

Brainworx faithfully emulated the ISA 110 and 130 modules in the bx_console Focusrite SC, bringing the warmth, depth, and musicality of the tools that shaped the sound of the 80s and 90s to your DAW. It features 72 individually modelled channels and patented Tolerance Modelling Technology — included with every ISA preamp and ADN card, and as part of Hitmaker Expansion with ISA C8X, Scarlett, and Clarett+ interfaces.
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Why choose Focusrite?

  • Three-year warranty

    Three-year warranty

    Three years of confidence, built in. Every ISA product is covered as standard, because trust in your gear has to go far beyond the purchase date.



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  • Award-winning support

    Award-winning support

    Real people, real expertise. Our support team has won awards for a reason. And they're here whenever you need them.



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  • Free delivery and returns

    Free delivery and returns

    Free delivery and free returns mean you can put ISA to the test in your studio before you commit.



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