The Collins 26U series is a vintage variable-mu broadcast tube limiter designed and built in the late '50s and early '60s.

Collins was seen as an innovator at that time - the company used UTC transformers at a time when most compressors had transformers with limited frequency response of 100 Hz to 10,000 Hz. In contrast, the 26U transformers have full frequency response from 20 Hz to 20,000 Hz. The Collins uses a UTC A 10 on the input with a special inter-stage and output transformer and the best long-life electrolytic can capacitors. Available in both mono (26U-1) and stereo (26U-2), Collins also uses the revered NOS 6386 tubes, which gives the unit its distincitve sonic imprint.

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