Focusrite ISA C8X

Focusrite ISA C8X Product Details

Description

Focusrite ISA C8X

Are you looking for a professional audio interface that combines classic ISA sound, modern remote control, extensive routing and high-quality AD/DA conversion in one central studio device? The Focusrite ISA C8X has been designed for setups where recording, monitoring, digital expansion and flexible signal routing need to work together reliably. As a 2U rack-mounted 26x28 USB audio interface, it offers a comprehensive feature set for sessions of all sizes, combining analog sound shaping with digital control.

At its heart are two ISA preamps with Lundahl LL1538 input transformers that add subtle warmth and richness to signals. These are complemented by six remotely controllable, ultra-low noise Focusrite mic preamps, giving a total of eight mic preamps. This makes the Focusrite ISA C8X suitable for demanding recording situations where both sonic character and precise controllability are required.

Manufacturer

In the product context provided, Focusrite stands for professional studio technology, reliable preamplifier concepts and a close combination of analog sound and digital operation.

The interface is equipped with established Focusrite technologies. These include ISA preamps with Lundahl transformers, AD/DA converters at the level of the RedNet series and control via Focusrite Control 2 for desktop and mobile devices. The result is a system that can be operated both directly on the device and remotely.

Technical details

The Focusrite ISA C8X offers 26 inputs and 28 outputs for analog and digital audio. The two ISA preamps are equipped with balanced inserts, rasterized and fine resolution gain control, switchable impedance, high-pass filters and up to 79 dB gain. The Lundahl LL1538 input transformers add warmth and fullness to the signal without compromising professional control over gain, impedance and signal routing.

Relay-based circuits are available on the two ISA preamps for additional sonic options. The Console mode provides variable saturation and warm analog tone coloration, while the 430 Air mode offers a treble boost. Both modes are fully analog and expand the sonic shaping directly within the interface.

Preamps, instrument inputs and sound shaping

In addition to the two ISA preamps, the Focusrite ISA C8X features six remote-controllable, ultra-low noise mic preamps. These provide 69 dB of transparent, detailed gain, analog air signal processing for open highs and variable drive DSP for analog-style harmonic saturation. This allows different recording sources to be captured in a differentiated way and shaped to suit the respective mix context.

The two instrument inputs on the front are routed via Lundahl transformers and offer selectable impedance. This supports the sound optimization of guitar, bass and other instruments. Console mode and 430 Air mode can also be used here, so that instrument signals can be given additional analog character directly during recording.

For patchbay setups and fixed studio installations, the interface provides eight dedicated balanced line inputs with fixed gain. External hardware can remain permanently connected without the need for repeated rewiring. The balanced inserts on channels 1 and 2 also allow external processing to be integrated into the signal path.

Conversion, routing and remote control

The AD/DA conversion of the Focusrite ISA C8X operates at 24 bit and up to 192 kHz. According to the information provided, the same converters are used as in Focusrite's RedNet series, with 125 dB dynamic range and 0.00022 % THD. For monitoring, 12 balanced line outputs are available, with support for mono, stereo and other configurations up to 7.1.4. Up to three monitor groups can be switched via the front panel or remote control.

Two dedicated Class AB headphone outputs offer independent level control, additional headroom and optimized impedance. ADAT, S/PDIF, MIDI and Word Clock are available for digital expansion. Via ADAT, 16 additional channels can be integrated, via S/PDIF two additional channels. This means that the system can be expanded to up to 26 recording channels.

Operation is either directly via the front panel or via Focusrite Control 2. The software and mobile app can be used to manage, save and recall gain levels, audio routing, preset mixes and low-latency monitoring. Auto Gain can also be used to automatically adjust the gain of all eight preamps within seconds.

Recommended purchase

The Focusrite ISA C8X is recommended for users who are looking for a central interface for a comprehensive studio setup and do not want to choose between analog character, transparent preamplification, digital expandability and convenient remote control. The combination of two ISA preamps with Lundahl transformers, six additional Focusrite microphone preamps, 12 line outputs, two headphone outputs, ADAT, S/PDIF, MIDI and Word Clock makes the device particularly versatile.

The Focusrite ISA C8X is a sophisticated solution for anyone working with multiple signal sources, wanting to permanently integrate external hardware or requiring monitoring configurations up to 7.1.4. The auto-gain function, recall options and Focusrite Control 2 make the workflow even easier, especially if the interface is installed in a rack and should not always be directly accessible.

The interface also offers strong arguments for sound-conscious productions. The ISA transformers, console mode, 430-air mode, analog air signal processing and variable drive DSP enable different timbres without losing sight of technical precision. This makes the Focusrite ISA C8X a compelling choice for anyone looking for a professional interface with classic ISA sound and modern studio control.

Features:

• 2U rack-mounted 26x28 USB audio interface
• Record, route and mix sessions of any size with 26 inputs and 28 outputs for analog and digital audio.
• Two remote controllable ISA preamps
• The Lundahl LL1538 input transformers add subtle warmth and richness to any signal and offer balanced inserts, gridded and fine resolution gain control, switchable impedance, high-pass filter and up to 79 dB gain.
• Analog sound at the touch of a button
• The two ISA preamps have relay-based circuits that enable variable saturation via the console mode and a treble boost via the 430 air mode.
• Six remote-controllable, extremely low-noise microphone preamps
• In addition to the two ISA preamps, six remote-controllable, ultra-low-noise Focusrite microphone preamps are available to reliably capture every nuance - with 69 dB of transparent, detailed gain as well as analog air mode and variable drive DSP.
• Two front-side instrument inputs with transformer
• Both inputs are routed via Lundahl transformers and provide the feel of a console as well as selectable impedance to optimize the sound of guitar, bass and other instruments. Console and 430 Air modes are also available for additional analog character.
• Eight dedicated balanced line inputs with fixed gain
• Designed for patchbay setups and permanent installations, the ISA C8X provides fixed-gain line inputs for connecting external hardware without the need for re-plugging.
• Automatic level adjustment
• Activate Auto Gain and let ISA C8X automatically adjust the gain of all eight preamps within seconds - directly from the front panel or the Focusrite Control 2 desktop and mobile apps.
• Flagship-level AD/DA conversion
• Record and mix with the same 24-bit/192 kHz AD/DA converters as Focusrite's RedNet series - with 125 dB dynamic range and 0.00022% THD.
• 12 balanced line outputs
• Work in mono, stereo and other configurations up to 7.1.4, with three monitor groups and front panel or remote switching. A professional maximum output level of +24 dBu is matched to the line inputs for consistent levels, with 125 dB A-weighted dynamic range; outputs 1 and 2 are available as both XLR and TRS.
• Two dedicated headphone outputs in Class AB design
• Each with independent level control, additional headroom and optimized impedance for powerful, detailed playback.
• ADAT, S/PDIF, MIDI and Word Clock
• Expand your setup with 16 additional channels via ADAT and two channels via S/PDIF - for up to 26 recording channels - as well as S/PDIF, MIDI and Word Clock connectivity.
• Focusrite Control 2 software and mobile app
• When front-panel control is impractical, Focusrite Control 2 lets you manage, store and recall your mixes and routings remotely, and monitor them with low latency across multiple connected interfaces.
• Award-winning support
• Sonnox Oxford Reverb
• Create the perfect reverb for any track with Oxford Reverb. This extremely flexible algorithmic reverb plug-in allows you to precisely adjust the desired room sound.
• ISA C8X audio interface
• USB-C to USB-C cable
• Region-specific IEC cable
• Rubber feet (4 pieces)
• Microphone preamp: 8
• Phantom power: Yes (independently switchable per channel)
• Line inputs: 8
• Instrument inputs: 2
• Insert sends: 2
• Insert returns: 2
• Line outputs: 12
• Headphone outputs: 2
• ADAT inputs: 2 (16 channels at 44.1/48 kHz and up to 8 channels at 96 kHz)
• ADAT outputs: 2 (16 channels at 44.1/48 kHz and up to 8 channels at 96 kHz)
• SPDIF input: 1 (2 channels at 96 kHz)
• SPDIF output: 1 (2 channels at 96 kHz)
• MIDI inputs: 1
• MIDI outputs: 1
• Word clock input: 1
• Word clock output: 1
• Talkback: Yes
• Loopback: Yes
• Connectors: USB Type-C
• Protocol: USB 2.0
• Format: Rack format (2 U)
• Simultaneous inputs and outputs: 26x28 (including loopback)
• A/D resolution: 24 bit/192 kHz
• Maximum power consumption: 40 W
• Bus power supply: No