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Mixthesizer Sumpressor

Summing Mixer and Stereo VCA Compressor

Analogue master compressor and summing performance tool that combines multi-input stereo summing, adjustable compression with preset and user modes, sidechain filtering, transformer-based DI output, precision LED metering, and flexible routing options to deliver complete final-stage control, dynamic shaping, and signal integration for professional live and studio applications.

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CAP2: 0 £1,250.00 £1,041.67 ex VAT

AVAILABLE TO ORDER

Sold out but more on the way. Contact us for accurate delivery time and our best price.

Check Stock Availability & Get Our Best Price
Check Availability & Get Our Best Price

WHY CHOOSE TO BUY FROM KMR AUDIO?

  • 20+ Years Industry Experience
  • Rated “Excellent” By Our Customers
  • Lifetime Tech Support, Always Free
  • Easy 14 Day Returns

The FC Pro Mixthesizer SUMPRESSOR is an analogue master compressor and summing unit that integrates four stereo inputs, transformer-based DI output, sidechain filtering, and precision metering to deliver final-stage dynamic control, tonal shaping, and signal consolidation for professional live and studio environments.

The unit combines the character of classic analog compression with modern workflow enhancements, offering a streamlined yet powerful solution for final-stage signal management. It operates as both a mastering compressor and a compact performance hub, allowing engineers and performers to shape dynamics, control levels, and manage multiple sources from a single device placed directly before the sound system. Its architecture supports intuitive operation while maintaining the sonic integrity expected from high-end analog circuitry.

Dynamic Control and Compression Architecture

The SUMPRESSOR centres around a responsive compression engine controlled via input, Action, and output parameters, each supported by a detailed 10-LED metering system. This layout ensures immediate visual feedback and precise gain staging at all times. The Action control governs the compression behaviour, enabling users to quickly dial in anything from subtle glue to more assertive dynamic shaping. The inclusion of preset modes alongside a fully adjustable user mode allows both rapid deployment and detailed customisation of attack, ratio, and release characteristics.

Integrated Analog Summing

The unit features four stereo inputs, including three accessible from the front panel and an additional rear XLR input, all summed through the compressor stage. This configuration allows multiple sources to merge into a cohesive stereo signal while benefiting from unified dynamic processing. The summing stage enhances workflow efficiency in both live and studio contexts, removing the need for additional routing equipment while preserving clarity and balance.

Sidechain Filtering and Low-End Management

A selectable high-pass sidechain filter provides targeted control over how low frequencies interact with the compression circuit. With frequency options at 200, 120, 90, and 60 Hz, the SUMPRESSOR prevents excessive low-end energy from triggering unwanted compression, ensuring a tighter and more controlled mix without sacrificing bass presence.

Output Versatility and Signal Routing

The main output stage incorporates a custom transformer-based DI, switchable as required, delivering a robust and harmonically rich balanced signal suitable for direct connection to professional sound systems. Alongside this, a dedicated Utility Output on TRS with independent level control offers additional routing flexibility, making it suitable for monitoring, parallel processing, or secondary signal distribution.

Mixer Mode Functionality

When compression is bypassed, the SUMPRESSOR operates as a transparent stereo summing mixer with balanced output. This mode allows the unit to function purely as a signal hub, maintaining flexibility in scenarios where dynamic processing is not required while still benefiting from its high-quality analog summing path.

Performance-Focused Design

The design prioritises immediacy and reliability, ensuring that users can make rapid adjustments in high-pressure environments such as live performances or recording sessions. The clear metering, logical control layout, and robust analog signal path support confident operation while maintaining consistent sonic results.

Why Choose SUMPRESSOR

  • Delivers confident control at the final stage, ensuring mixes translate cleanly to any sound system
  • Simplifies complex setups by combining compression, summing, DI, and mixing in one unit
  • Enables fast decision-making with clear metering and intuitive controls
  • Adapts easily to both live and studio workflows without additional equipment
  • Preserves sonic integrity while adding cohesion, punch, and clarity to the overall mix
  • Analog master compressor with final-stage signal control
  • Input, Action, and output controls with 10-LED metering
  • Four stereo inputs including three front panel and one rear XLR
  • Integrated analog summing through the compressor stage
  • Preset modes plus user-configurable compression settings
  • Adjustable attack, ratio, and release in user mode
  • High-pass sidechain filter with selectable frequencies
  • Transformer-based DI output on main XLR
  • Switchable active DI functionality
  • Utility TRS output with independent level control
  • Compression bypass enabling stereo summing mixer mode
  • Balanced output for professional signal integration
DPD UPS
  • UK over £99 FREE
  • UK under £99 £10
  • EU £36
  • Rest of World £80

Large/Heavy items: Extra charges may apply (e.g., consoles, large monitors). We’ll contact you before processing if so.

We ship with DPD and UPS across the UK, EU and worldwide. Same-day within the M25 is available depending on stock.

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.

Mixthesizer Sumpressor

Mixthesizer Sumpressor

Summing Mixer and Stereo VCA Compressor

AVAILABLE TO ORDER

KEY BENEFITS

Streamlined Signal Management

Integrates compression, summing, DI, and mixing into one unit, simplifying complex setups and enhancing workflow efficiency in both live and studio environments.

Intuitive Control and Feedback

Features a detailed 10-LED metering system and user-friendly controls, enabling rapid adjustments and precise gain staging for confident operation during high-pressure performances.

Versatile Output Options

Offers a custom transformer-based DI and dedicated Utility Output, providing flexible routing for monitoring, parallel processing, or secondary signal distribution to suit various applications.