Focusrite ISA-220
Not much is documented about the Focusrite ISA-220 beyond its period marketing and one substantial review. It appeared in print from early 2002 through at least 2004 as the ISA 220 "Session Pack" - a 2U rack-mount recording channel with a transformer-coupled mic/line preamp, equalizer, compressor, de-esser, and limiter in one box. Focusrite's own advertising in early 2002 said it drew on classic circuit designs from the award-winning ISA 430, with the legendary transformer-based preamp, at a price aimed at working audio professionals.
Pro Audio Review (January 2004, p.26) gave the ISA-220 a proper studio review and confirmed the family tree. It called the unit an uncompromised recording channel with a bandwidth of 10 Hz to 150 kHz, using the classic Focusrite transformer-based mic preamp found in the ISA 110, Red 1, and Red 8. The reviewer noted an optional A/D card and tested the unit with it fitted. EQ (August 2004, p.25) summed the ISA 220 up as bringing ISA performance to a wider audience.
Known specs:
- 2U rack-mount channel strip: mic/line preamp, EQ, compressor, de-esser, limiter
- Bandwidth: 10 Hz–150 kHz
- Transformer-based Focusrite mic preamp (ISA 110 / Red 1 / Red 8 design lineage)
- Optional A/D converter card
No production years, original price, or further circuit details have surfaced in the available record.
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