Boulder 1151 Mono Power Amplifier

The 1151 brings Boulder's amplifier engineering into a chassis sized to fit a conventional rack, sharing its footprint with the 1110 preamplifier and 1163 stereo amplifier.

It uses a Class A Smart Current biasing circuit and protection circuitry that shuts down the output stage immediately on a shorted cable or fault, built around 40 output transistors and 12 supply capacitors per chassis.

Specifications

• Power: 250W continuous into 8, 4 or 2 ohms, peak 350W at 8 ohms, 600W at 4 ohms, 750W at 2 ohms
• THD: 0.002% to 0.02%
• Gain: 26dB
• Frequency response: +0.00/-0.04dB, -3dB points 0.015Hz/150kHz
• Inputs: balanced XLR, 200k ohms bal, 100k ohms unbal
• Outputs: dual wingscrew posts
• Weight: 54 lbs