Relab 176 Compressor/ Limiter
Hardware-Accurate Tube Compression In Software Form
Get It Now For Only $199
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(Pay Over Time is only $19.99 a month for 12 months)
This is the Relab 176 Compressor/ Limiter
Accurately modeled from the entire audio circuit of a vintage 1960s 176-style compressor: every tube, transformer, timing network, and power supply interaction is re-created using a real time circuit solver. This preserves the tone, timing, and dynamic behavior of the original hardware.
Hardware-Accurate from Input to Output
The Relab 176 reproduces everything: the tone, timing, and dynamic behavior of the hardware. Every tube stage, transformer, and timing network responds as it does in the original.Compression That Adapts to the Music
Fixed-threshold, variable-gain design where ratio, drive, and source material interact to shape timing, curve, and harmonics.Instant Control Over Tone and Transients
Switchable interstage transformer, asymmetry detection, and calibration trims allow quick changes to character and transient handling.
Put the 176’s tone, timing, and control into your next mix – and hear it for yourself.
Features That Preserve the 176’s Sound - and Expand Its Workflow
Ratio-Driven Knee Behavior for Nuanced Dynamics
The Relab 176 follows the original fixed-threshold design with four hardware ratios -2:1, 4:1, 8:1, and 12:1. Knee position and slope change with each ratio, producing compression that ranges from smooth leveling to assertive limiting.
Compression intensity adapts naturally, ensuring nuanced dynamic shaping at every setting.
Program-Dependent Timing from True RC-Tube Interaction
Attack and release times come from resistor-capacitor networks directly coupled to the tube gain stage.
Timing is program-dependent, shaped by signal level, transient size, tube nonlinearity, and transformer interaction — not fixed millisecond values.
The Fixed/Auto toggle changes how release adapts to the program
Polarity-Selective Detection for Targeted Transient Control
The Sidechain Polarity control in the Relab 176 changes how the detector responds to the positive, negative, or both halves of the waveform. This lets you target specific transient edges — for example, clamping kick drum attack without touching low-end body, or controlling plosives in vocals without affecting overall presence.
Transformer Path for Sub-ms Attack, Resistor Path for Vintage Thump
The Stage Coupling switch changes how the variable-gain tube stage connects to the output amp:
Transformer – Adds a transformer between stages for faster attack (sub-ms possible), subtle “smiley curve” tone, and reduced low-end wobble.
Resistor – Uses a resistor path for slower attack, flatter tone, and more vintage-style low-frequency thump.
Both are authentic circuit paths and can be chosen for transient speed, tone, and low-end behavior.
Shift Bias, Harmonics, and Threshold in a Single Move
Calibration shifts the internal tube bias and balance – just like adjusting multiple trim pots on the original hardware – changing threshold, harmonic profile, and dynamic feel.
Bias & Balance: Adjusts 6BC8 and 12AX7 tube operating points, influencing even/odd harmonic mix and low-frequency stability.
Threshold Shift: Moves the point where compression begins without changing your input gain.
Dynamic Response: Alters transient smoothness and micro-dynamics.
Tone Shaping: Warms, brightens, or tightens tone depending on bias settings.
It’s a single control that moves multiple internal parameters together, with extra flexibility available via the plugin’s back-panel trims.
Advanced Bias & Level Tuning
Click the Relab logo to access advanced controls: three hardware-style trim pots for 6BC8 bias, 6BC8 anode balance, and 12AX7 bias – plus a Reference Level control.
Fine-tune threshold, harmonic mix, transient response, and low-frequency stability with the same adjustments available inside the original hardware, now with greater flexibility for gain staging and tone shapin
Hear It For Yourself
Relab 176 Preset Demos
Relab 176 Hardware to Software Comparisions
Craig Bauer, Mixer/Engineer
(30+ Grammy winning and nominated records)
The typical words used to describe a compressor plugin just don’t begin to cut it with the 176. The range of tones, in addition to the dynamic control, is simply mind boggling.
If I had only ONE compressor to use ever again, this is it. The range of sounds is extraordinary. Subsequently, there is nothing it didn’t sound great with…from drums, to bass, to vocals.
Koen Heldens- Mixer/Engineer
80 million sold & over 26 billion streams (Kanye West, Lil Wayne, XXXTENTACION)
I’ve used the hardware. The Relab 176 nails it. This is the first time I’ve heard software compression actually move like the real thing
One More Thing…..You’re Not Just Getting Your New Favorite Plug-in…
When you invest in the Relab 176 Compressor/ Limiter, you’re stepping into a whole new world of value. Here are all the bonuses that are waiting for you:
Hand-Crafted Factory Presets
Revitalize your mixing process with presets that have been meticulously crafted by sound experts. These aren't just generic settings; they're starting points designed to inspire and guide you to your best-sounding mixes ever.
Exclusive Community Access
Join a community of like-minded professionals and enthusiasts. Share your mixes, get feedback, and learn from the best in the industry. More than just a group; it's a family of sound aficionados.
Tips and Tutorials
Whether you're a seasoned pro or just starting out, our library of tutorials will assist you in getting the most out your 176. From basic setups to advanced techniques, we've got you covered.
Industry-Leading Customer Support
Ever felt lost or confused with a product? Well, we’ve got your back. Our dedicated support team is always on standby, ready to assist you. Whether it's a technical glitch or a simple query, we're here for you.
30-Day No-Questions-Asked Money Back Guarantee!
Our Promise to You: You don’t need to make a final decision right now. All we ask is that you give it a try. Fully explore the Relab 176 plug-in for a full 30 days, starting from the day you purchase. If you find that the plug-in doesn’t capture the essence of the original hardware, or doesn’t elevate your mixes with the same unparalleled depth and clarity, or even if it doesn’t resonate with your unique creative spirit, then we believe it’s only fair that you shouldn’t have to pay for it. And if that’s the case, simply reach out, and our customer support team will process a swift, hassle-free refund. No strings attached!
Hardware Requirements
Mac requirements (64-bit only):
- OS: macOS 12 Monterey or higher
- CPU: Apple Silicon M1 or newer
- RAM: 8 GB minimum, 16 GB+ recommended
- Formats: AU, VST3, AAX (64-bit)
- Auth: iLok account (dongle optional)
Compatible host application (Apple Silicon–native versions):
– Pro Tools: 2020.11 and up (AAX 64-bit)
– Cubase: 9.5 and up (VST3 64-bit)
– Nuendo: 8 and up (VST3 64-bit)
– Ableton Live: 10 and up (64-bit)
– Reaper: 7 and up (64-bit)
Win requirements (64bit only):
- OS: Windows 10 and up (64-bit)
- CPU: Intel Core i7 (8th-gen+) or AMD Ryzen 5 (3000-series+) with AVX2 support
- RAM: 8 GB minimum, 16 GB+ recommended
- Formats: VST3, AAX (64-bit)
- Auth: iLok account (dongle optional)
Compatible host application:
– Pro Tools: 2020.11 and up (AAX 64-bit)
– Cubase: 9.5 and up (VST3 64-bit)
– Nuendo: 8 and up (VST3 64-bit)
– Ableton Live: 10 and up (64-bit)
– Reaper: 7 and up (64-bit)
If your system is slightly older than what is listed, it may still run – but please ensure you test the plugin using the free trial. Thanks!
No hardware dongle is required to authorize this product.
You can choose between local computer authorization OR the ilok USB key (V2 or above). However, a free PACE iLok account, internet connection and the latest PACE drivers are required at the time of product activation. A PACE Ilok account and drivers are available here.