Union Audio FOUR VALVE Signature-Serie Rotary Desktop Mixer

Union Audio FOUR VALVE Signature Series Rotary Desktop Mixer

Are you looking for a high-end analog mixer that combines state-of-the-art technology with the characteristic sound of classic tubes? The Union Audio FOUR VALVE Signature Series Rotary Desktop Mixer is the perfect choice for discerning DJs, hi-fi enthusiasts and studio professionals who don't want to compromise on sound, feel and aesthetics. Limited to just 100 units, this Andy Rigby-Jones Signature Edition is an audiophile masterpiece - handmade in the UK, with exclusive components and a design that makes sound history.

The Signature series stands for absolute sound fidelity, sophisticated user guidance and a luxurious appearance that blends in perfectly with both high-end studios and sophisticated club or home DJ setups.

Design & workmanship at the highest level

Even at first glance, the FOUR VALVE Signature Mixer conveys its special class. The combination of metallic bronze-coloured front panel with CNC-milled, anodized aluminium trims and hand-polished solid oak side panels exudes an exclusive modern-retro aesthetic. The blue and white channel displays, inspired by the elara.6, harmoniously round off the elegant design.

The robust metal housing reliably protects the sensitive analog technology and is ready for continuous use in a professional environment. Union Audio also relies on uncompromising quality for the power supply: The high-quality Mix.R linear power supply is included in the scope of delivery - for maximum signal purity without interference.

Incomparable sound thanks to tube technology

The heart of the FOUR VALVE Signature is its fully analog tube circuitry, which ensures musical saturation and harmonious-sounding compression in every channel. Especially at high levels, the tubes produce natural second-order harmonics - for a warm, immersive sound that remains transparent yet pleasantly colored. The tube circuit is fully integrated into the signal path and delivers a sound image that combines classic hi-fi aesthetics with modern precision.

Professional features for maximum control

The 4-channel rotary mixer offers both phono and line inputs (RCA) on each channel, making it equally suitable for vinyl, CDJs or other sources. The RIAA input stage has been specially optimized for detailed and dynamic vinyl playback. Parallel VCA audio paths reduce distortion and extend the dynamic range, while MUSES01 operational amplifiers in the summing stage ensure audiophile precision.

Special control is provided by the four precisely damped rotary fader modules - taken directly from the flagship Orbit.6 model. A high-quality Innofader crossfader, a natural-sounding 3-band EQ per channel and an intuitive effects section with send/return enable creative mixes at the highest level.

Connections & routing

The mixer offers versatile connection options for professional setups:

• Per channel: Phono and line input (RCA)
• Aux control per channel for external effects (send/return, 2 x 6.3 mm jack)
• Master-Out: balanced via XLR
• Booth-Out: 6.3 mm jack
• Record-Out: stereo cinch
• Headphone connections: 6.3 mm and 3.5 mm jack

Separate level controls for master, booth and aux return as well as a powerful headphone amplifier with split cue and cue/mix control round off the professional routing.

Conclusion: A masterpiece of analog technology

The Union Audio FOUR VALVE Signature Series Rotary Desktop Mixer is much more than just a DJ mixer - it is an analog instrument for audiophile sound design. Whether in the high-end club, in the studio or on stage, this device defines how a modern rotary mixer should sound and feel. With its tube technology, VU meters, exclusive workmanship and professional features, it is a real highlight for anyone who takes sound seriously.

Features:

• 4-channel analog rotary mixer with tube technology (Valve)
• Andy Rigby-Jones Signature Edition
• Limited to 100 units each
• 4 precise and highly damped rotary fader modules from the Orbit.6
• 2 illuminated analog VU meters
• Blue and white channel indicators, inspired by the elara.6
• Metallic bronze front panel with CNC-milled aluminum bezels
• Hand-polished solid oak side panels
• Refined RIAA input stages for vinyl
• Parallel VCA audio paths for high dynamic range and low distortion
• Integrated MUSES01 operational amplifiers
• Mix.R linear power supply included
• Phono and line inputs per channel (RCA)
• 3-band EQ per channel
• Innofader crossfader
• Aux send/return per channel (2 x 6.3 mm jack)
• Separate level controls for master, booth and aux return
• Headphone amplifier with split cue and cue/mix control
• Universal headphone connections: 6.3 mm & 3.5 mm jack
• Master-Out: XLR balanced
• Booth-Out: 6.3 mm jack
• Record-Out: stereo cinch
• Analog circuitry for warm, musical sound
• Robust metal housing, made in the UK

Dimensions & weight:

• Dimensions: 35.0 x 10.0 x 28.3 cm (WxHxD, incl. controls)
• Weight: 4.75 kg
• Shipping dimensions: 48 × 38 × 20 cm
• Shipping weight: 7 kg

Specs:

• Channels: 4
• Rack Mountable: no
• Effect Processor: no
• Talkover: no
• USB Port: no
• Line Inputs: 4
• Mic Inputs: 2
• Phono Inputs: 4
• Crossfader adjustable: yes
• Color: Brown
• Type: DJ Mixer
• Theme: DJ Equipment

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