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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.
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The L1's output impedance is 30Ω against the 2110's 100Ω, its output voltage 8.0V RMS against 28.0V RMS, and its weight 20 kg (44 lbs) against 28.6 kg (63 lbs). Both share thd (0.001%).
The XS Pre's output voltage is 22.0V RMS against the 2110's 28.0V RMS and its output impedance 20Ω against 100Ω. Both share thd (0.001%) and class (A).
The Libra's output impedance is 80Ω against the 2110's 100Ω, its output voltage 10.0V RMS against 28.0V RMS, and its weight 26 kg (57 lbs) against 28.6 kg (63 lbs). Both share class (A).
The L10 Dual Monaural Line's output impedance is 0Ω against the 2110's 100Ω, its weight 42.93 kg (95 lbs) against 28.6 kg (63 lbs), and its width 440 mm against 460 mm. Both share thd (0.001%).
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