Overview
Naked ZERO-Autoformers are compact impedance-matching devices designed to optimize the interface between amplifiers and loudspeakers. By increasing the effective speaker impedance, they reduce amplifier strain, improve damping behavior, and allow the amplifier to operate in a more linear, efficient region.
The result is greater control, lower distortion, and more stable power delivery—especially with difficult or low-impedance speakers.
Hand-built in Lake Elmo, Minnesota.
Why ZERO-Autoformers
- Impedance Multiplication
Converts 4-ohm speakers into 8-, 12-, or 16-ohm loads. - Amplifier Optimization
Reduces current stress, lowers distortion, and improves usable power. - Improved Electrical Matching
Allows amplifiers to operate closer to their intended design conditions. - Compact, Direct Placement
Can replace short speaker cables when used with monoblock amplifiers. - Built by Hand
Individually assembled and verified for long-term reliability.
For Demanding Systems
Naked ZERO-Autoformers are particularly effective with:
- Tube amplifiers using 8-ohm output taps into 4-ohm speakers
- OTL amplifiers where impedance directly determines available power
- Solid-state amplifiers driving difficult or reactive loads
- Vintage amplifiers paired with modern speakers
They are compatible with a wide range of loudspeakers and amplifier designs, including planar magnetics and electrostatics.
Key Features
- Impedance multiplication ratios of 2×, 3×, or 4×
- Compact, enclosure-free (“Naked”) design
- Can replace short speaker cables in monoblock setups
- Hand-built in the USA
- 60-day in-home trial
Audible Result
Amplifiers operate with greater ease.
Bass becomes firmer and more controlled.
Dynamics feel less constrained.
Detail emerges without strain.
The system sounds more composed—because it is.
Reviews & Commentary
“The ZERO operates right at the amplifier-loudspeaker interface… an important new product category.”
— Dick Olsher, EnjoyTheMusic
“Greater sense of power and control, cleaner bass, and more precise spatial presentation.”
— Wayne Donnelly, EnjoyTheMusic
Warranty & Support
Every pair of Naked ZERO-Autoformers is built for long-term use and includes:
- 60-Day Risk-Free Trial
- Lifetime Warranty covering materials and workmanship
- Responsive Support with fast repair or replacement if needed
Built to integrate correctly. Supported for life.