Boulder 2150 Mono Power Amplifier

The 2150 replaces Boulder's 2050, a design that stayed in production for nearly 18 years, and reflects three decades of Boulder amplifier design refinement.

It uses computer-designed surface-mount boards secured in custom-machined, damped frames, dual toroidal transformers potted in welded steel enclosures, and two 99H2 gain stages descended from the 990 studio gain stage, with 80 bipolar output transistors and full Class A biasing with analog efficiency management.

It includes Boulder Link integration, a 12V trigger, and bi-wire terminals.

Specifications

• Power: peak 1000W at 8 ohms, 2000W at 4 ohms, 4000W at 2 ohms
• THD: 0.0008% to 0.009%
• Topology: Class A to full rated output
• Inputs: balanced XLR, 200k ohms bal, 100k ohms unbal
• Outputs: dual wingscrew posts, bi-wire capable
• Weight: 220 lbs