Focusrite ISA 428 MkII – Four-Channel Transformer-Based Mic Preamp

The Focusrite ISA 428 MkII brings the legendary ISA mic preamp design into a streamlined 2U rackmount enclosure, offering four transformer-based mic pres with modern enhancements. Featuring selectable input impedance, dedicated insert points, front-panel instrument inputs, and optional high-quality A-D conversion, the ISA 428 MkII delivers exceptional sound quality and flexibility for any recording setup. Ideal for both vintage microphones and modern condensers, the ISA 428 MkII combines Focusrite’s iconic preamp sound with modern versatility, ensuring pristine audio capture across all applications.

Key Features:

• Four ISA Series Mic Preamps: Renowned for their rich, detailed sound, the ISA mic pres have been the choice of top producers for decades.
• Selectable Input Impedance: Four settings, including the vintage ISA 110 impedance, ensure optimal performance with any microphone and provide tonal flexibility.
• Front-Panel Instrument Inputs: Direct access for overdubbing guitars, bass, or other instruments without the need for a DI box.
• Dedicated Analogue Insert Points: Switchable insert points allow seamless integration of external processors for each channel.
• Variable High-Pass Filter: Adjustable from 16 to 420Hz for precise low-frequency control.
• Accurate 6-LED Meters: Provide clear visual feedback of signal levels for every channel.
• Optional Eight-Channel A-D Converter: Expands the ISA 428 MkII to include high-quality digital outputs with a dynamic range of 122dB and low jitter performance (sold separately).
• 80dB of Gain: Up to 60dB on the rotary controls with an additional +20dB trim for maximum signal boost.

Versatile and Studio-Ready

The ISA 428 MkII excels in capturing audio from any source, thanks to its flexible mic, line, and instrument inputs. Its selectable input impedance enhances compatibility with vintage and modern microphones, while the variable high-pass filter and insert points ensure full control over your signal chain. With 80dB of gain, the ISA 428 MkII handles even the quietest sources with ease.

Expand Your Workflow

Upgrade your ISA 428 MkII with the optional eight-channel A-D converter to integrate seamlessly with your DAW. This high-quality converter offers a dynamic range of 122dB, making it perfect for professional recording setups. The rear-panel insert points provide the option to add inline compression or EQ for complete signal processing flexibility.

Classic Sound, Modern Convenience

Focusrite’s ISA preamps have shaped countless hit records with their signature sound, derived from the original ISA 110 module. The ISA 428 MkII retains this heritage while adding modern features like selectable impedance and enhanced metering, making it a versatile tool for any studio.

Studio-Grade Software Included

Every ISA 428 MkII includes the Brainworx bx_console Focusrite SC plug-in, a faithful emulation of the Focusrite Studio Console’s ISA 110 Equaliser and ISA 130 Dynamics Modules. Capture the warmth and precision of classic studio hardware right in your DAW.Specifications:

• Input Options: Mic, line, and instrument inputs on each channel.
• High-Pass Filter: 16 to 420Hz variable cutoff, 18dB/octave slope.
• Gain Range: Up to 80dB.
• Meters: 6-segment LED meters for peak level monitoring.
• Optional A-D Converter: Adds eight channels of digital output with 122dB dynamic range (sold separately).

Backed by a 3-year warranty, the Focusrite ISA 428 MkII is designed to deliver professional-quality audio and reliable performance for years to come.