User-Friendly Configuration Makes Sonic Sense

Conventional designs use inexpensive, low-quality computer rocker switches. Their design is inadequate for configuring the low-level signal from a phono cartridge. To offer the user a wide range of configurations while maintaining signal integrity, Insight uses gold-plated header pins and gold-plated shunts. They offer high-pressure and large surface area contacts. Each channel has two configuration headers: One to select cartridge loading and another to select gain. When changing configuration, be sure to set each channel to the same value. Options are printed directly on the circuit board next to the configuration headers.

Inside the Linear Power Supply

With the linear power supply, the power transformer is toroidal for minimal radiated magnetic field, which itself gets further reduced by connecting the primary windings in series rather than parallel. As a result, the transformer flux density is reduced to half of its normal value. The transformer's AC output is full-wave rectified, current limited, and applied to a first stage shunt regulator—an approach that gives the first stage of voltage regulation and smooths the current waveform drawn thru the transformer. The usual current spikes become much more sinusoidal in shape—and are not injected back into the power line nor project a radiated noise field. The first cut at regulation is followed by several stages of R-C pi filtering, a passive approach proven in other Sutherland designs. Another DC shunt regulator is applied near the audio circuitry.

Why Sutherland Engineering Is Different and Why It Matters

Ron Sutherland found the inspiration for his illustrious line of phono preamplifiers in the topography of Kansas. As a college student there, he observed the state's tall grass prairies and uncomplicated beauty. The Sutherland Engineering founder also fell in love with the Midwestern work ethic. He incorporates these purist, albeit elusive, qualities into his designs, which epitomize a disciplined approach focused on perfectionist-minded refinement, straightforward schematics, and professional-instrument-caliber craftsmanship. Embracing a "superior quality through simplicity" credo, Sutherland products avoid coloration, clutter, and contamination at all costs. What remains are U.S.-built components that ensure nothing stands between you and your music.