Compact Size. Legendary Boulder Sound.
At Music Lovers Audio, we are proud to offer the Boulder 1163 Stereo Power Amplifier, a premium two-channel amplifier designed for audiophiles seeking world-class performance in a more compact, space-conscious design. Handcrafted in Boulder, Colorado, the 1163 embodies the sonic purity and engineering precision that Boulder Amplifiers are known for—delivering exceptional detail, power, and musicality.
If you're searching for a high-end stereo amplifier, the Boulder 1163 is a standout choice. With 150 watts per channel into 8 ohms (and up to 325 watts into 2 ohms), this amplifier effortlessly drives a wide range of high-performance speakers. Its low-distortion, fully balanced circuitry ensures crystal-clear audio reproduction, whether you're listening to vinyl, digital sources, or streaming high-resolution audio.
The 1163 is the perfect match for serious two-channel systems where space is at a premium but performance cannot be compromised. It shares the same footprint as Boulder’s acclaimed 1110 Preamplifier, making it ideal for rack-mounted or furniture-based high-end audio systems.
Why Choose the Boulder 1163 Stereo Power Amplifier from Music Lovers Audio?
Trusted authorized dealer of Boulder Amplifiers
Expert service and personalized system matching
In-store consultations
Key Features of the Boulder 1163 Stereo Amplifier:
150W per channel into 8 ohms / 325W into 2 ohms – powerful enough for even demanding speakers
Fully balanced design – reduces noise and improves clarity
Proprietary 985 gain stage – for exceptional sonic transparency and dynamics
Automatic bias circuitry – ensures optimal performance without manual adjustments
Compact chassis – same size as Boulder 1110 Preamplifier, ideal for space-conscious high-end systems
Advanced protection circuitry – protects your investment with real-time fault detection
Ethernet and USB connections – for firmware updates and system integration
Audiophile Performance in a Smaller Package
Unlike larger, more imposing mono block amplifiers, the Boulder 1163 delivers reference-level stereo sound in a design that fits comfortably in any high-end audio setup. It’s an ideal solution for those looking to upgrade to audiophile-grade amplification without the need for oversized components.
Pair the 1163 with the Boulder 1110 Preamplifier, reference loudspeakers, or premium DACs and streamers for an unparalleled listening experience.
Technical Specifications:
Power Output: 150W (8Ω), 325W (2Ω)
THD: 0.002% at 150W into 8 ohms
Frequency Response: +0.00, -0.04 dB (20Hz – 20kHz)
Input Impedance: 50kΩ balanced, 25kΩ unbalanced
Weight: 54 lbs (24.5 kg)
Inputs: Balanced XLR
Outputs: High-current binding posts
Boulder 1163 Stereo Power Amplifier
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Continuous Power; 8, 4, 2 Ohms
150W
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Peak Power, 8 Ohms
200W
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Peak Power, 4 Ohms
325W
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Peak Power, 2 Ohms
550W
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THD, 8 Ohms, 150W
0.002%, 20kHz 0.01%
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THD, 4 Ohms, 150W
0.002%, 20kHz 0.01%
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THD, 2 Ohms, 150W
0.003%, 20kHz 0.02%
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Equivalent Input Noise (EIN), 20 kHz, BW
2.2 μV
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Magnitude Response, 20 Hz TO 20 kHz
+0.00, -0.04 dB
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Magnitude Response, -3 dB at
0.015 Hz, 150 kHz
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Voltage Gain
26 dB
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Input Impedance
Balanced: 50k ohms,
Unbalanced: 25k ohms -
Input Connectors
3-pin balanced XLR
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Output Connectors
Two sets of 6 mm / .250-inch wingscrews
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Weight
Amplifier: 54 lbs. (24.5 kg)
Shipping: 64 lbs. (29.0 kg) -
Power Requirements
100, 110-120, 220-240 VAC, 50-60 Hz
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Power Consumption
10W Standby
110W Idle

































