Focusrite ISA 430 MKII Channel Strip

Focusrite ISA 430 MKII Channel Strip

The Focusrite ISA 430 MKII Channel Strip is a single-channel processor built around the transformer-based ISA microphone preamp, adding a 4-band equaliser, compressor/limiter, gate/expander, de-esser and soft limiter in one 2U-style rack unit.

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Why Choose Focusrite ISA 430 MKII Channel Strip?

A channel strip earns its place by replacing a rack of separates with one coherent path. The 430’s preamp gives weight and presence, its EQ is musical rather than surgical, and its two compressor characters, VCA and vintage optical, cover both transparent levelling and coloured vocal compression.

Key Features

• ISA transformer preamp: Lundahl LL1538 transformer with variable impedance and up to 60 dB of mic gain.
• 4-band EQ: two parametric bands and two shelving bands, plus high-pass and low-pass filters.
• Dual compressor characters: VCA compression and a vintage optical compressor/limiter in one unit.
• Gate and de-esser: an expander/gate for tidy tracks and a de-esser tunable from 2.2 to 9.2 kHz.
• Soft limiter and VU meter: a soft limiter guards the converter, and the backlit VU meter shows output level.

Best Suited For

Vocal chains, voiceover booths and instrument recording where a complete, high-end analogue front end is wanted in one unit. That is the buyer the Focusrite ISA 430 MKII Channel Strip is built for.

Setup and Connection Guide

Connect the microphone to the front or rear mic input, set impedance and gain for the microphone, shape the sound with EQ and dynamics, and take the line output to a converter or interface. Add the optional A-D card only if digital outputs are required. Once connected, the Focusrite ISA 430 MKII Channel Strip is ready for its first session.

Frequently Asked Questions

Does the Focusrite ISA 430 MKII Channel Strip include the digital output card?

Not in this listing. The stereo A-D card is an option; confirm with the store whether the unit in stock carries it.

What microphones suit the ISA preamp?

The variable impedance (600, 1.4k, 2.4k and 6.8k ohms) lets it match ribbon, dynamic and condenser microphones.

Is it a single channel?

Yes. The 430 MkII is a mono channel strip for one microphone, line or instrument source at a time.

Technical Specifications

Explore Related Products

If the Focusrite ISA 430 MKII Channel Strip fits your system, also look at the Focusrite Scarlett Octopre Dynamic for a matching Focal / Focusrite setup, and read the manufacturer’s reference at Alto Music for full documentation.