Relab Color Drive

Saturation Built From a Real-Time Circuit

Color Drive doesn’t stack algorithms or approximate “warmth.” It solves the Relab 176 tube stage, with the input transformer, 6BC8 variable-gain tube, calibration bias, and output transformer, as a single, living circuit.

That’s why it behaves like hardware: every move changes the way the whole system responds.

It’s hardware logic, in software form.

Features

• Hardware-Accurate Saturation Behavior Every control affects the whole system, so tone, dynamics, and harmonics interact like real analog hardware.
• Musical, Responsive Harmonics Harmonics evolve naturally with signal level—never static—preserving realistic density, tone, and transient shape.
• Drive Control Based on a True Tube Stage Increasing Drive pushes an accurate 6BC8 tube model, producing controlled transient rounding, harmonic weight, and authentic tube glow.
• Switchable Output Transformer Engaging the transformer completes the analog chain, emphasizing odd-order harmonics for added punch, focus, and solidity.
• Tube Bias (Calibration) Control Adjusts the tube’s bias point to blend in even-order harmonics, allowing precise shaping from clean focus to warm contour.
• Advanced Input Shaping Controls Low-end crossover preserves bass clarity, while tilt and high-shelf filters let you choose which frequencies drive the tube harder for targeted coloration.
• Real-Time Circuit Modeling The entire Relab 176 tube stage (input transformer, 6BC8 tube, bias, output transformer) is solved as one continuous circuit, not stacked algorithms.

Tech Specs

Operating System: mac macOS 12 Monterey or higher

Processor: Apple Silicon M1 or newer

RAM: 8 GB

Supported Plugins: VST-3, AU, AAX

Operating System: windows Windows 10 and up (64-bit)

Processor: Intel Core i7 (8th-gen+) or AMD Ryzen 5 (3000-series+) with AVX2 support

RAM: 8 GB

Supported Plugins: VST-3, AAX