Radiator

Radiator is a dual-channel tube input and EQ plugin that models the Altec 1567A mixer, the legendary five-input tube preamp used extensively during Motown's foundational years. Rather than pursuing surgical accuracy, Soundtoys has captured the essential sonic character of the original hardware: a warm, characterful sound with pronounced harmonic coloration and natural saturation that increases musically as you push the input.

The plugin centers on simplicity. Two EQ controls - bass and treble - operate with the same broad strokes as the original unit, making surgical frequency work impractical but encouraging decisive, musical mixing decisions. The parallel mix control allows you to blend processed and dry signals, a practical addition that grants flexibility without abandoning the hardware's straightforward philosophy. The real magic emerges from the interaction between input stage saturation, the modeled output transformer, and the EQ circuits, which respond nonlinearly to driving input levels.

Radiator excels on sources that benefit from aggressive character. Bass and drum tracks gain noticeable punch and presence; vocals acquire a slightly gritty, forward quality that cuts through dense arrangements. The saturation adds harmonic weight rather than distortion, though pushing hard yields recognizable coloration. Producers seeking neutral tone shaping should look elsewhere, but engineers comfortable with colored gear will find genuine utility here.

Among tube emulations, Radiator occupies a specific niche: it prioritizes the distinctive sonic signature of a particular legendary piece of equipment rather than transparent amplification. Compared to more transparent tape and tube emulations, it's far more aggressive and opinion-forward. For mixing chains that value character alongside clarity, it remains an effective tool.