2110

About the 2110

The Boulder 2110 is Boulder Amplifiers' four-chassis, reference line preamplifier and the company's flagship continuously produced model, designed for maximum neutrality, transparency, and control in state-of-the-art systems. It provides six pairs of programmable, differentially balanced XLR line-level inputs and three pairs of balanced main outputs, plus an additional balanced auxiliary output, enabling complex setups including bi- and tri-amplified systems and powered subwoofers. The preamplifier implements Boulder's fully balanced, analog discrete-step volume control with programmable step sizes of 0.1, 0.5, or 1.0 dB, accurate to ±0.01 dB, to allow extremely precise, low-noise level setting across a 100 dB volume range and up to 20 dB maximum voltage gain. Its architecture uses four separate chassis—left audio channel, right audio channel, user-interface/control, and a dedicated power-supply chassis—to isolate sensitive analog circuitry from supply, control, and display noise. The power-supply chassis contains multiple, separately regulated supplies for the left and right analog sections and the control/interface circuitry to further minimize interference and noise. Key measured performance includes a maximum input level of 7 Vrms, maximum output level of 28 Vrms, frequency response from 0.02 Hz to 300 kHz (-3 dB), THD+N of 0.0008% (20 Hz to 5 kHz) and 0.001% at 20 kHz at 2 V output, and crosstalk between channels of -134 dB or better from 20 Hz to 20 kHz. The industrial design features a distinctive wrap-around mirror-glass display window with multi-level adjustable brightness and hand-polished stainless-steel controls. Extensive configuration options include input naming, gain trim, polarity inversion, theater/bypass mode, and full remote operation with IP/Ethernet-based control via Boulder Link. The main preamplifier chassis weighs approximately 28.6 kg (63 lb) and the separate power-supply chassis approximately 21.8 kg (48 lb). Designed and manufactured by Boulder Amplifiers, Inc. in Boulder, Colorado.