The AudioScape AS78 is one of those compressors that feels instantly familiar—but with just enough flexibility to make it more than a one-trick pony.

At its core, you’re getting that classic fast FET response—tight, controlled, and capable of grabbing transients in a way that feels both precise and musical. It’s the kind of compression that can rein things in without killing the energy, which is exactly why this style of circuit has been a studio staple for so long.

What stands out with the AS78 is how usable it is across different roles. In stereo mode, it does a great job adding control and cohesion to buses or even a full mix, while still keeping things punchy and open. Flip it into dual mono, and it becomes a really versatile tracking tool—equally comfortable on vocals, guitars, or drums.

It’s also easy to dial in. The controls are straightforward, and you can get to a good place quickly, whether you’re going for subtle leveling or more assertive peak control. The sidechain filter is a nice touch, too—it lets you keep low end from over-triggering the compression, which makes a big difference on bass-heavy material.

Sonically, it hits a nice balance. It’s not overly colored, but it’s not sterile either—there’s just enough harmonic character to give things a bit of weight and presence without feeling heavy-handed.

For engineers looking for a fast, flexible FET-style compressor that can handle both tracking and mix duties, the AS78 delivers that classic sound with a modern, practical edge.

The AudioScape AS78 is a dual-channel FET compressor/limiter designed to deliver the speed, control, and character of a classic studio staple—updated for modern workflows.

Inspired by the legendary late-’70s dual FET designs, the AS78 features a true dual-channel architecture with both stereo-linked and independent (A/B) operation. This flexibility allows it to function as a cohesive stereo bus processor or as two discrete channels for tracking and mixing applications.

At the heart of the AS78 is its ultra-fast FET topology, known for precise transient control and the ability to tame peaks without sacrificing punch. The result is a sound that balances speed and transparency, while still introducing a subtle harmonic richness that adds depth and character to the signal.

Each channel offers independent input and output controls, with shared attack and release parameters for intuitive operation. Classic ratio selections and responsive gain reduction behavior make it easy to dial in everything from gentle leveling to aggressive peak limiting.

Modern enhancements include a switchable sidechain high-pass filter (80Hz or 120Hz), allowing low-frequency content to pass through uncompressed for improved clarity and control—particularly useful on mix bus and drum applications.

Built with high-quality components and a focus on maintaining the integrity of the original circuit design, the AS78 combines vintage inspiration with modern reliability and usability. It excels across a wide range of sources—from vocals and guitars to drums and full mixes—offering both precision and musicality in equal measure.

The result is a versatile, studio-ready compressor that delivers fast, controlled dynamics with a touch of classic analog character—making it a powerful addition to any recording or mixing setup.

• Handcrafted in the USA
• Custom-Wound Cinemag Steel Output Transformer (for maximum character)
• NOS transistors (found in the original units) utilized in Crucial Areas of the Compressor/Amplifier Sections
• Period-Correct Attack & Release Time Constants
• Cornell Dubilier Silver Mica Capacitors
• Wima Coupling Capacitors
• Period correct Carbon film resistors used in the original circuitry, 1% precision resistors used for the modification sections
• Fully Variable Input/Output and Attack/Release
• Attack On/Off Switch (Bypasses Compression; Use the AS78 as a Line Amp for it’s Exhilarating Saturation and Harmonics!)
• Additional Blend control option added
• Additional Sidechain High Pass Filter options added of 80/120Hz
• Original Style Push-Button Ratio Control (4:1/8:1/12:1/20:1)
• Alpha & CTS Potentiometers
• Electronically Balanced +4dBu circuitry
• Custom Vintage-Styled dB Gain-Reduction Meter
• Original-Style toggle switches and Pilot Light
• Highest-Quality US made Recreation Knobs
• Real Metal Neutrik XLR Input and Output Connectors
• Triad International Series Toroidal Power Transformer
• External 120V/240V Power Supply for lowest noise spec

Warranty

This item is sold without the Sound Pure 3-year warranty (used / B-stock / dealer-exempt). Coverage terms for items in this category live in Terms & Conditions, Section 27.

Returns

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