Boulder 3000 Series
Innovative technologies, intelligent construction and unmistakable design. Over time these efforts become second nature. Boulder’s 3000 Series is the summit of high performance.

3010 — Preamplifier
• Matched, dual-phase 993SD gain stage improves thermal tracking and optimizes ground
• Variable Blend control allows recordings with hard-panned images or mono LPs played with stereo cartridges to create a stable center image
• Ethernet connection downloads future software updates and connects to IP-based home control systems
• Three balanced outputs can be operated independently for multiple zones or together for bi- or tri-amplification
• Boulder’s own fully-balanced volume control significantly reduces distortion and step noise
• Programmable Soft mode temporarily reduces output to levels suitable for conversation
Specifications: 3010 Preamplifier
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Balanced Inputs
6 via 3-pin XLR
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Balanced Outputs, Dual
3 via 3-pin XLR
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Auxiliary Balanced Output
1 via 3-pin XLR
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Maximum Input Level
7 Vrms
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Maximum Output Level
28 Vrms
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THD+N, 2V Output, 20 Hz to 5 kHz
0.0008% (-102 dB)
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THD+N, 2V Output at 20 kHz
0.001% (-100 dB)
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Maximum Voltage Gain
20 dB
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Volume Range
100 dB
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Volume Steps
0.1, 0.5, 1.0 dB ± 0.01 dB
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Auxiliary Path Gain
-1 dB
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Frequency Response, 20 Hz to 5 kHz
+0.00, -0.03 dB
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Frequency response, -3 dB
0.02 Hz & 300 kHz
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Input Impedance
333kΩ, Balanced
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Output Impedance
100Ω, Balanced
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Power Requirements
90-120V / 200-240V, 50 – 60 Hz
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Power Consumption
240W Maximum
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Preamplifier Chassis Dimensions
19” (48.25 cm) W x 18” (45.75 cm) D x 9.25” (23.5 cm) H
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Preamplifier Chassis Weight
78 lbs. (35.4 kg)
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Power Supply Chassis Dimensions
19” (48.25 cm) W x 18” (45.75 cm) D x 5.1” (13 cm) H
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Power Supply Chassis Weight
45 lbs. (20.4 kg)
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Shipping Dimensions
27” (68.6 cm) W x 33” (83.8 cm) D x 26” (66.1 cm) H
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Shipping Weight
235 lbs. (106.6 kg)
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3050 — Mono Power Amplifier
• Boulder’s biggest, most powerful, and highest performing amplifier, each built to order for its new owner
• Completely designed, manufactured, and hand-assembled at our facility in Louisville, Colorado
• 1,500 watt power output into any load means absolute clarity and control of loudspeakers
• Black granite and stainless steel base, cut to match the angles and footprint of both the left and right amplifiers
• Intelligent microprocessor control so amplifiers can automatically set proper turn-on sequence via Boulder Link and transmit any necessary information to a Boulder preamp’s display
• Every 3050 contains two of Boulder’s highest performing gain stages, the 99H, available only in 3000 Series products
• Full Class-A biasing to maximum output, managed with an analog circuit that reduces bias current whenever possible to increase efficiency and reduce heat
• 120 output transistors for unequaled damping and power delivery
• Four transformers per amplifier, each DC filtered, sealed in machined housings, and potted in a proprietary epoxy for silent operation
• Circuit boards are installed in aluminum mounting frames precisely machined to fit the board and sandwiched with a layer of damping material
• Left and right amplifier chassis are mirror-imaged and feature multiple surface angles to break up any reflected sound
• Differentially balanced, instrumentation-style input circuitry for ideal electrical interface with any preamplifier or source component
Specifications: 3050 Mono Power Amplifier
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Peak Power, 8 Ohms
2100W
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Peak Power, 4 Ohms
3000W
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Peak Power, 2 Ohms
6000W
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THD, 8 Ohms, 1500W
20-2 kHz: 0.0005%, 20 kHz: 0.0035%
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THD, 4 Ohms, 1500W
20-2 kHz: 0.0008%, 20 kHz: 0.0045%
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THD, 2 Ohms, 1500W
20-2 kHz: 0.0014%, 20 kHz: 0.0110%
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Equivalent Input Noise (EIN), 20kHz BW
1.5 μV
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Magnitude Response, 20 to 20KHz
+0.00, -0.04 dB
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Magnitude Response, -3dB at
0.015 Hz, 200 kHz
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Voltage Gain
26dB
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Input Impedance
Balanced: 200KΩ,
Unbalanced: 100KΩ
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Common Mode Rejection (Balanced only)
60 Hz: 90dB,
10 kHz: 70dB
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Inputs
3-pin balanced (XLR)
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Output Connectors
2 sets of 6 mm / .250-inch wingscrews
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Power Requirements
220-240 VAC
50-60 Hz, 300W nominal, 6000W at maximum output
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Weight
Amplifier: 355 lbs. (161 kg),
Granite Base: 86 lbs. (39 kg),
Shipping: 563 lbs. (256 kg)
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Amplifier Topology
Pure Class A to full rated output
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3060 — Stereo Power Amplifier
• Production of the 3060 is extremely limited and every unit is built to order
• All assemblies are completely designed, manufactured and hand-assembled at our facility in Louisville, Colorado
• 900W per channel power output into any loudspeaker load
• Each amplifier is shipped with a machined aluminum and polished stainless steel base that is cut to match the footprint and casework angles of the amplifier
• Contains four (two per channel) of Boulder’s highest performing gain stage, the 99H
• Bias operation is Class-A to full rated output power and managed with an analog circuit that minimizes heat and power consumption
• 60 bipolar output transistors per channel mean unmatched control of any loudspeaker system
• 48 massive filter capacitors are part of an ultra-responsive, low-impedance power supply
• Five power transformers, housed in machined cases and potted to absolutely eliminate any noise, vibration or hum
Specifications: 3060 Stereo Power Amplifier
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Peak Power, 8 Ohms
900W
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Peak Power, 4 Ohms
1650W
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Peak Power, 2 Ohms
3000W
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THD, 8 Ohms, 900W
20-2 kHz: 0.0006%, 20 kHz: 0.0025%
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THD, 4 Ohms, 900W
20-2 kHz: 0.0008%, 20 kHz: 0.0030%
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THD, 2 Ohms, 900W
20-2 kHz: 0.0012%, 20 kHz: 0.0045%
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Equivalent Input Noise (EIN), 20kHz BW
1.5 μV
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Magnitude Response, 20 to 20KHz
+0.00, -0.04 dB
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Magnitude Response, -3dB at
0.015 Hz, 200 kHz
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Voltage Gain
26dB
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Input Impedance
Balanced: 200KΩ,
Unbalanced: 100KΩ
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Common Mode Rejection (Balanced only)
60 Hz: 90dB,
10 kHz: 70dB
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Inputs
3-pin balanced (XLR)
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Output Connectors
2 sets of 6 mm / .250 inch wingscrews
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Power Requirements
220-240 VAC
50-60 Hz, 300W nominal, 6000W at maximum output
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Weight
Amplifier: 355 lbs. (161 kg),
Granite Base: 86 lbs. (39 kg),
Shipping: 563 lbs. (256 kg)
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Amplifier Topology
Pure Class A to full rated output
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