1

About the 1

The Jeff Rowland Design Group Model 1 is a solid-state stereo power amplifier introduced in the early 1990s, featuring a compact chassis machined from aluminum. It delivers modest power ratings suitable for high-efficiency speakers and can be bridged into a 250W monoblock configuration without sonic degradation. Design incorporates proprietary distortion canceling techniques, lack of negative feedback, and individually matched high-speed bipolar output transistors for reliability and low distortion. Rear panel includes power switch (designed for continuous on with standby), single-ended and balanced inputs (normal/inverting), selectable input impedances via DIP switches, bridging switch, and dual output connectors per channel for bi-wiring. It shares circuit topologies with higher-end Rowland models but with reduced power supply capacity. No longer manufactured, as confirmed in 2016, with current Jeff Rowland lineup focusing on newer products.