Overstayer M-A-S Model 8101 Rotary – Modular Analog Saturation Processor with Rotary Controls
The Overstayer M-A-S Model 8101 Rotary is a refined version of Overstayer’s acclaimed Modular Analogue Saturation Processor, designed for precise tactile control and a classic analog feel.
Featuring rotary knobs instead of toggle switches, this edition offers continuously variable control over key parameters, allowing engineers to fine-tune saturation, drive, and tonal balance with exceptional accuracy.
Built in Los Angeles with Overstayer’s signature discrete analog circuitry, the 8101 Rotary delivers the warmth, density, and harmonic complexity of vintage tape and transformer circuits with the precision needed for modern mastering and mixing environments.
Key Features
- Analogue harmonic processor for adding warmth, punch, and musical saturation to mixes, tracks, and instruments.
- Rotary control interface for seamless adjustment of input, drive, and blend levels — perfect for mastering and recall accuracy.
- Uses custom discrete Class A analog circuitry for rich, musical harmonic coloration.
- Stereo or dual mono operation with precise channel matching for professional studio use.
- Blend control allows parallel processing for subtle enhancement or bold saturation.
- Frequency contouring for shaping low-end weight and high-end harmonic focus.
- Preserves transient integrity while enhancing perceived loudness and depth.
- Transformer-coupled I/O for natural analog compression and tone shaping.
- Designed and hand-assembled in Los Angeles, USA, using premium analog components.
Applications
- Mix Bus / Mastering: Add analog weight, harmonic richness, and subtle glue to full mixes.
- Tracking: Bring out natural presence and warmth in vocals, drums, bass, and guitars.
- Stem Processing: Perfect for drum groups, synth layers, or stereo bus coloration.
- Sound Design: Achieve creative saturation textures and analog compression effects.
Technical Specifications
| Unit Type | Dual Mono / Stereo Analog Saturation Processor (Rotary Control Edition) |
|---|---|
| Circuit Type | Discrete Class A analog circuitry with transformer-balanced I/O |
| Controls | Input, Output, Mix (Dry/Wet), Low Contour, High Contour, Drive – all rotary continuous controls |
| Operation Modes | Stereo linked or dual mono operation |
| Inputs / Outputs | Balanced XLR, +4 dBu line level |
| Frequency Response | 20 Hz - 20 kHz (±0.2 dB) |
| THD Range | 0.01% to 15% (variable depending on drive level) |
| Dynamic Range | >110 dB |
| Power | Internal universal power supply (100-240V AC) |
| Form Factor | 1U rackmount chassis |
| Weight | Approx. 3.5 kg |
| Build | Hand-built in Los Angeles, California, USA |
Why Choose the M-A-S 8101 Rotary?
The Overstayer M-A-S Model 8101 Rotary takes everything loved about the standard M-A-S and enhances it with precision rotary controls for smoother, more intuitive operation.
This model is ideal for mastering engineers and mix professionals who value detailed recall, fine control, and a hands-on analog workflow.
Whether you want to subtly glue a mix gold add vintage-style energy and harmonic drive, the 8101 Rotary delivers unmatched warmth, character, and sonic integrity.