Focusrite ISA 220

Not much is documented about the Focusrite ISA 220 outside of period studio-equipment reviews. The record shows a single-channel preamp and processor for project and professional studios. It was marketed as the "Session Pack" and sat below the higher-end ISA 430 as the more affordable option.

Bandwidth was specified at 10 Hz to 150 kHz. An optional A/D converter card could be fitted, which turned the unit into a direct digital front-end for a DAW or digital console. Pro-Audio-Review (January 2004, p.26) treated it as an uncompromised recording channel in a compact format. Sound-on-Sound-UK (January 2003, p.29) noted that the Session Pack cost roughly half as much as the earlier Producer Pack, which had itself been a staple in larger facilities.

Exact production years, original pricing and sales figures are not recorded in the available literature.

Known Specifications

• Type: Mic/line preamplifier and processor (channel strip)
• Bandwidth: 10 Hz – 150 kHz
• Sections: Mic/line preamp, equalizer, compressor, de-esser, limiter
• Optional A/D converter card available
• Mic preamp: transformer-based, derived from ISA 110 / Red 1 / Red 8 design

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