The ISA430 MkII brings together a set of classic Focusrite heritage elements:

  • Classic Focusrite ISA transformer-based mic pre with variable input impedance
  • Versatile equalisation including two dual-range parametrics, HPF and LPF
  • Dual-mode compressor with both VCA and optical circuitry
  • VCA-based expander/gate with “hysteresis” setting to avoid chattering
  • Phase-cancellation de-esser for more natural processing
  • Optional 192kHz/24-bit A-D conversion with soft limiter

Together, they form a comprehensive channel strip with impeccable specifications. But the ISA430 MkII is much more than that. The four main elements – mic pre, EQ, Dynamics and A-D converter – can be accessed individually and each used as a separate processor. Elements can be chained and patched together via multiple inserts and in different orders to form a variety of signal paths to meet every processing requirement. Used as either a comprehensive channel strip or as separate processors, the ISA430 MkII offers you the pinnacle of classic Focusrite analogue processor design and performance. There’s simply nothing quite like it.




The Most Versatile Channel Strip

The ISA 430 MkII features Focusrite’s ultimate heritage sonic signature including transformer-based mic pre, versatile EQ with two dual-range parametrics, compressor with both transparent VCA and vintage optical circuitry, expander/gate, phase-cancellation de-esser and optional 192kHz/24-bit 2-channel A-D conversion.

Transformer-based Mic Pre with Variable Impedance

The mic pre suits almost all mics including vintage and ‘difficult’ models such as ribbons. Variable impedance can be set for transparency or to highlight special features of the mic, such as presence bumps and rolloffs. Switchable additional inductance adds “air” without EQ.

Four Units in One, Independently Accessible

Use the mic pre, EQ, Dynamics and A-D converter independently, or route them to build powerful simultaneous processors. Re-order different sections to create multiple alternative signal paths.

Powerful Processing Options

Insert HPF, LPF and EQ into the Dynamics sections for frequency-sensitive processing – Listen function lets you audition the side-chain to fine-tune the effect.

Control Over Dynamics

Expander/gate features “hysteresis” setting to avoid chattering on difficult signals. De-esser is based on phase cancellation at the chosen frequency, for more natural sound.