Teaching Machines - Wellspring

The Teaching Machines Wellspring is a boutique analogue stereo spring reverb machine with two full-sized reverb tanks, dual delay lines, four sweepable stereo analogue filters, stereo pitch and filter modulation up to audio oscillator speeds, and a unique feedback loop that creates near-infinite tails. Shipped in sustainable packaging, supplied with an operation manual and external power supply, and backed by a 5-year warranty, it offers a professional-grade solution for engineers, producers and musicians seeking extraordinary depth and flexibility in reverb design.

Analogue Spring Reverb Design

The Wellspring houses two full-sized stereo spring reverb tanks, with four springs in total, delivering an authentic, wide and immersive stereo field. The natural warmth and depth of the analogue springs create a rich foundation for expansive and complex reverb textures.

Stereo Delay Integration

A stereo pair of delay lines sits before the reverb tanks, offering independent or sync-able delay times with dedicated feedback control. This design allows seamless blending of delay and reverb, producing exceptionally long and evolving tails that can transform simple signals into vast soundscapes.

Filters and Modulation Control

To prevent long reverb tails from ringing excessively, the Wellspring integrates four sweepable stereo analogue filters alongside two types of stereo modulation. The modulation runs from subtle movement to full audio-rate oscillation, enabling both refined sculpting and experimental sound design.

Magic Feedback Loop

The Wellspring’s defining feature is its unique feedback loop that crosses over channels so the right spring feeds back into the left delay and vice versa. This circuit creates near-infinite tails and opens the door to unexpected, evolving sonic behaviours, from delicate harmonic layering to intense feedback saturation. Users must treat it with caution, as it can push signals into extreme and unpredictable territory.

Connectivity and Mounting

The unit includes a high impedance guitar input alongside stereo line inputs and outputs, making it suitable for a wide range of studio and live applications. At 3RU in height, it fits standard 19″ racks with attachable rack ears, or it can sit securely on a desk or table using the supplied rubber feet.

Why Choose the Wellspring

• Create vast, immersive and authentic analogue spring reverbs

• Shape and extend tails with integrated stereo delays

• Prevent unwanted resonance with sweepable filters

• Add motion and texture using stereo modulation up to audio rates

• Explore experimental sound design with the cross-feedback loop

• Connect guitars or stereo line-level gear with ease

• Rackmount or tabletop placement for flexible setups

• Enjoy peace of mind with a 5-year manufacturer’s warranty

• Boutique analogue stereo spring reverb with two full-sized tanks
• Four springs in total for wide, immersive stereo sound
• Stereo delay lines with independent or sync-able timings
• Dedicated delay feedback controls
• Four sweepable stereo analogue filters
• Stereo modulation up to audio oscillator speeds
• External LFO synchronisation
• Cross-feedback loop for near-infinite reverb tails
• High impedance guitar input and stereo line I/O
• Rackmountable (3RU) with attachable ears or desktop-ready with feet
• Supplied with external power supply and manual
• Shipped in sustainable packaging
• Covered by 5-year warranty against defects or electrical failure

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.