• 2-HE USB-C audio interface
• 26 inputs and 28 outputs
• 8 remotely controllable microphone preamps
• 2 ISA microphone preamps with Lundahl LL1538 transformers
• 6 remotely controllable Focusrite microphone preamps
• up to 79 dB of gain on the ISA channels
• 69 dB gain on channels 3 to 8
• Console mode on the ISA channels
• 430 Air mode on the ISA channels
• Analogue Air mode on channels 3 to 8
• Variable Drive DSP on channels 3 to 8
• Switchable impedance on microphone and instrument inputs 1 to 2
• 2 front-panel transformer-coupled instrument inputs
• 2 balanced inserts
• 8 balanced line inputs with fixed gain
• 12 balanced line outputs
• 2 Class AB headphone outputs
• Auto Gain for all eight preamps
• 24-bit / 192 kHz AD/DA conversion
• 125 dB dynamic range on the line outputs
• ADAT with up to 16 additional channels
• S/PDIF, MIDI and Word Clock
• Talkback, loopback
• Focusrite Control 2 for desktop and mobile devices
• Monitoring configurations up to 7.1.4
• three-year warranty
• Sonnox Oxford Reverb included

The Focusrite ISA C8X combines classic studio character with modern interface architecture. This 2U USB-C audio interface connects 26 inputs and 28 outputs to eight remotely controllable microphone preamps, including two genuine ISA preamps with Lundahl transformers. This makes the ISA C8X not only a recording hub for large sessions, but also a serious control centre for a complete studio featuring analogue outboard gear, digital expansions and convenient recall.

Its particular appeal lies in the combination of classic ISA sound, digital control and an I/O concept that brings everything together at a high standard – from tracking and monitoring to the integration of external hardware.

Both ISA microphone preamps are based on Lundahl LL1538 input transformers and deliver precisely the sound for which the ISA series has been prized for years: subtle warmth, greater richness and a pleasantly confident sound. Yet they are not limited to vintage nostalgia; instead, they can be fully controlled via the front panel or using Focusrite Control 2.

With up to 79 dB of gain, switchable impedance, a high-pass filter, balanced inserts and precise gain control, the two ISA channels are designed for serious recording work. This provides a very solid foundation, particularly for vocals, acoustic guitars, ribbon microphones or high-quality DI signals.

The two ISA preamps also offer Console mode and 430 Air mode. In Console mode, an analogue soft-clip circuit provides greater saturation, body and rich bass. 430 Air adds a silky sheen to the high-frequency range and is sonically modelled on the ISA 430 MkII.

This allows the fundamental character of a signal to be shaped very deliberately right from the input stage. The ISA C8X is therefore not only neutral and precise, but can also be used to significantly shape the sound if desired.

In addition to the two ISA channels, there are six remotely controllable, extremely low-noise Focusrite microphone preamps. They deliver 69 dB of transparent gain, capture even the finest nuances cleanly and are perfect for drum set-ups, ensemble recordings, multi-channel tracking or additional microphone sources in everyday studio work.

Here, too, there are sonic options: analogue Air mode for more open highs, and variable Drive DSP for harmonic saturation in the style of classic analogue circuits.

For guitar, bass and other instruments, there are two instrument inputs on the front panel, which also run through the Lundahl transformers. This means that DI signals also benefit from the characterful ISA signal path. The selectable impedance further helps to optimally match the sound of the connected instrument.

This is a real advantage, particularly when recording guitars and basses directly, as it allows you to influence the playing feel and tone shaping much more consciously.

Auto Gain for quick level set-ups

With Auto Gain, the ISA C8X automatically adjusts the gain of all eight preamps in a matter of seconds. This saves time during set-up, speeds up session changes and is particularly helpful when switching between artists or set-ups. The function can be activated directly on the unit or via Focusrite Control 2.

Focusrite Control 2 for remote control and recall

If the interface isn’t within easy reach, Focusrite Control 2 takes over. The desktop and mobile apps allow you to conveniently manage gain, routing, monitoring, mixes and recall settings remotely. Multiple compatible Focusrite devices can also be controlled together, making the ISA C8X particularly appealing for larger or expandable setups.

The eight balanced line inputs with fixed gain are clearly designed for patchbay workflows and permanent studio cabling. Outboard gear can be integrated once and remains immediately available without the need for constant re-plugging. In day-to-day use, this is often more valuable than it might initially appear on the spec sheet.

The ISA C8X features 24-bit / 192 kHz AD/DA conversion on a par with the Focusrite RedNet series. With a dynamic range of 125 dB and 0.00022% THD, the technical specifications are clearly professional-grade. Added to this are 12 balanced line outputs, enabling set-ups ranging from mono to 7.1.4, including three monitor groups and convenient switching.

There are also two dedicated Class AB headphone outputs with independent volume control, additional headroom and optimised impedance. This ensures detailed and powerful headphone signals, whether you’re tracking, editing or monitoring.

Those who need more channels or digital integration have plenty of options. ADAT allows for the addition of 16 extra channels, with S/PDIF providing a further two. MIDI and Word Clock are also available. This means the ISA C8X can be easily integrated into existing digital studio set-ups or used as the core of a growing system.

The package includes, amongst other things, Sonnox Oxford Reverb, a flexible reverb plug-in for high-quality room sounds. The Hitmaker Expansion is also available. The overall package is rounded off by a three-year warranty and Focusrite’s renowned support, available 365 days a year.