The Sebatron THORAX is a professional channel strip that combines a high-voltage discrete Class A microphone preamp, passive two-band equaliser, and optical compressor into a single unit. By integrating all three sections, the Sebatron THORAX achieves a streamlined audio path with fewer buffer stages, resulting in a wide bandwidth, very low noise floor, and exceptional headroom. Its design allows engineers to capture signals with clarity, depth, and minimal degradation.
The preamp employs six-way selectors for pad/gain and shelving EQ, making settings easily recallable. Both the high and low shelving EQ bands are integrated directly into the preamp circuit to preserve signal purity. The high shelf boosts clarity and openness without harshness, while the low shelf adds body and warmth or reduces excess low end in a smooth, musical way. Adjusting the pad/gain selector not only alters gain but also changes tonal response, offering multiple ways to achieve the desired level and colour with the Sebatron THORAX.
The compressor section, inspired by the Sebatron SMAC optical design, is versatile and intuitive. It provides both feedforward and feedback modes, each offering different compression characteristics, particularly at higher ratios. The pump mode extends the ratio range, adding further control and even a subtle ducking effect. Attack and release times are adjustable across wide ranges, while the mix control enables parallel compression, retaining natural dynamics alongside processed sound.
Housed in a rugged steel chassis with a textured black finish and grey front panel, the Sebatron THORAX is engineered for both reliability and musical flexibility. It delivers a complete recording solution where tone shaping, dynamics control, and amplification are seamlessly integrated.
Features
- High-voltage Class A valve and solid-state signal path
- Dual triode 12AT7/ECC81 and high-voltage silicon transistor design
- Six-way pad/gain selector for flexible gain staging
- Passive two-band shelving EQ integrated into the preamp circuit
- High shelf adds clarity and openness without brittleness
- Low shelf adds depth and warmth or attenuates smoothly
- Optical compressor with feedforward and feedback modes
- Pump mode for extended ratio control and ducking effect
- Attack and release adjustable across wide time ranges
- Comp mix control for parallel compression
- Streamlined audio path for low noise and wide bandwidth
- Rugged 2U steel chassis with powder-coated finish