Boulder 1100 Series
The 1100 Series is truly advanced and modern in design, technology, and execution. It is art revealing art.

1108 — Phono Preamplifier
• Two pairs of balanced inputs for systems with more than one turntable, cartridge, or tonearm
• Traditional RIAA equalization as well as EMI, FFRR (London/Decca), and Columbia EQ settings for LPs made before 1955
• Low-cut filter to eliminate low frequency noise caused by turntable rumble or damaged LPs
• Fully-balanced input circuitry to take advantage of a phono cartridge’s naturally balanced output
•Flexible resistive and capacitive cartridge loading and setup (MC and MM) via removable rear panel Personality Cards
• Proprietary 985 gain stage is engineered specifically for the 1108 and encased in a housing machined from a solid block of aluminum
• Gain settings of 70 dB (MC) and 44 dB (MM) enable use with virtually any phono cartridge
• Interlocking casework damps vibration and shields the delicate analog phono signal inside
• Two pairs of balanced outputs to connect preamplifiers and recording devices at the same time
Specifications: 1108 Phono Preamplifier
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Inputs
2 pairs balanced,
converts to unbalanced
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Outputs
2 pairs balanced,
use as Main or Record
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Input Impedance, Maximum
MC: 1000 ohms
MM: 47k ohms
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1 kHz Gain, RIAA
MC: 70 dB
MM: 44 dB
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Frequency Response, RIAA
±0.10 dB,
20 Hz to 20 kHz
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Distortion, THD
+0.01%
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Noise (EIN), MC
98 nanovolts flat,
20 Hz to 20 kHz
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Maximum Output Level
16 Vrms
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Crosstalk, L to R or R to L
-100 dB or better,
20 Hz to 20 kHz
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Weight
37 lbs. (16.8 kg),
Shipping: 51 lbs. (23.2 kg)
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Power Requirements
100-240 VAC, 50-60 Hz
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Power Consumption
32W
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1110 — Stereo Preamplifier
• Five pairs of programmable, differentially-balanced inputs
• Balanced version of Boulder’s own analog volume control, descended from the 3010 Preamplifier, for superior clarity and noise elimination
• Each input can be configured for Theater Mode when integrated into home cinema systems
• Large, easy-to-read, LCD display
• Available IP control connection for simple use connection to home automation systems
• Unique front panel design displays the topographical map of Flagstaff Mountain, located near Boulder, Colorado
• Full surface-mount circuit board architecture manufactured on Boulder’s own precision pick-and-place machine
• Comprehensive setup and options programming for all inputs and preamplifier functions
• Automated online software management for worry-free updating
• Boulder’s own 983 gain stage means excellent buffering and current drive for long cable runs
• Embedded ARM processor controls all preamplifier functions and setup options
• Dual-mono audio boards isolate left and right channels for perfect stereo separation in a single-chassis design
Specifications: 1110 Stereo Preamplifier
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Input Connections
5 pairs balanced line level
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Output Connections
2 pairs balanced main, 1 pair balanced auxiliary
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Volume
100 dB range in 0.5 dB steps (200 steps) or 1.0 dB steps (100 steps)
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Maximum Input Level
6.0 Vrms
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Maximum Output Level
14.0 Vrms
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THD+N, 2V Output, 20 Hz – 20 kHz
0.0015% (-96.5 dB)
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Output Loaded with 150 ohms
Less than 1 dB distortion change, 20 – 10 kHz
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Maximum Voltage Gain
20 dB
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Auxiliary Path Gain, Balanced Output
8.5 dB balanced
2.5 dB unbalanced
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Frequency Response, 20 Hz – 20 kHz
+0.00, -0.03 dB
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Frequency Response, -3 dB at
0.02 Hz and 250 kHz
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Clip to Noise Ratio
118 dB
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Crosstalk, L to R or R to L
-101 dB or better, 20 Hz to 20 kHz
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Crosstalk, Adjacent Inputs
-115 dB or better, 20 Hz to 20 kHz
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Input Impedance
100k ohms, balanced
50k ohms, unbalanced
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Output Impedance
100 ohms, balanced
50 ohms, unbalanced
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Control System
IP (Ethernet), IR, Boulder Net
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Weight
36 lbs. (16.3 kg),
Shipping: 49 lbs. (22.2 kg)
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Power Requirements
100, 120, 220-240 VAC, 50-60 Hz
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Power Consumption
75W maximum
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1160 — Stereo Power Amplifier
• 300 watts of output power can drive any reasonable loudspeaker to realistic levels
• Machined front panel depicts the topography of Flagstaff Mountain near Boulder, Colorado
• Improved thermal management reduces temperature while operating
• Ethernet-enabled supervisor circuitry monitors amp, protection systems, and IP and HTML control
• New grounding system and fully-balanced circuit design improve clarity and reduce distortion
• Robust output section using 56 output transistors means excellent reliability, control, and power with any loudspeaker
• Dual power transformers are DC filtered and enclosed a welded steel case for perfectly silent operation
• Boulder Net control access connects to networked systems & integrated homes and links the 1160 with other Boulder products
• Boulder’s 983 gain stage combines discrete and monolithic design for excellent sound quality
Specifications: 1160 Stereo Power Amplifier
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Continuous Power; 8, 4, 2 Ohms
300W
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Peak Power, 8 Ohms
300W
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Peak Power, 4 Ohms
600W
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Peak Power, 2 Ohms
1200W
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THD, 8 Ohms, 300W
20-2 kHz: 0.0009%, 20 kHz: 0.0048%
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THD, 4 Ohms, 300W
20-2 kHz: 0.0016%, 20 kHz: 0.0071%
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THD, 2 Ohms, 300W
20-2 kHz: 0.002%, 20 kHz: 0.0130%
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Equivalent Input Noise (EIN), 20 kHz, BW
1.5 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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Signal to Noise Ratio (re: 300W/8Ω)
-127 dB, unweighted, 20 to 22 kHz
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Input Impedance
Balanced: 100k ohms,
Unbalanced: 50k ohms
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Common Mode Rejection (Balanced Only)
60 Hz: 90 dB, 10 kHz: 70 dB
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Crosstalk, L to R or R to L
Greater than 120 dB
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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: 135 lbs. (61.2 kg)
Shipping: 215 lbs. (97.5 kg)
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Power Requirements
100, 110-120, 220-240 VAC, 50-60 Hz
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Power Consumption
15W standby, 240W nominal, 3600W at maximum output
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1161 — Stereo Power Amplifier
• 200W peak power per channel into 8 ohms, 350W peak power into 4 ohms, 450W peak power into 2 ohms
• Space saving design is the same footprint (width and depth) as the 1110 Preamplifier and lower power output allows the use of a standard power cord
• Smaller carton packaging means easier transportation, unpacking, and installation
• Truly balanced input connections and output stage as with other 1100 Series products
• Newly developed protection circuitry safely and immediately shuts down the output section in case of shorted speaker cables or faults in the system and allows for greater peak power output
• Superior signal handling and resolution achieved using Boulder’s own 985 gain stage, just as in the larger 1160 Stereo Amplifier
• Revised and redesigned automatic biasing circuit accurately stabilizes bias to eliminate the need for manual calibration
• Complete smart-home and integration compatibility with 12V trigger, IP control, and networked HTML page
• Software updates to the internal control and housekeeping systems available as needed with automated online downloads or manual USB port installation
Specifications: 1161 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
350W
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Peak Power, 2 Ohms
450W
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THD, 8 Ohms, 150W
0.003%, 20 kHz: 0.01%
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THD, 4 Ohms, 150W
0.004%, 20 kHz: 0.015%
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THD, 2 Ohms, 150W
0.005%, 20 kHz: 0.025%
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Equivalent Input Noise (EIN), 20 kHz, BW
1.5 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: 200k ohms,
Unbalanced: 100k ohms
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Common Mode Rejection (Balanced Only)
60 Hz: 90 dB, 10 kHz: 70 dB
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Crosstalk, L to R or R to L
-100 dB or better, 20 Hz to
20 kHz
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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)
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Power Requirements
100, 110-120, 220-240 VAC, 50-60 Hz
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Power Consumption
15W standby, 100W nominal, 1000W at maximum output
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