Boulder - 1160 stereo power amplifier

The art of technological progress, beautifully expressed in the art of visual design,

in an amplifier of truly remarkable ability. Let us present to you the Boulder 1160.

Awe-inspiring and modern, yet staying true to Boulder’s long-standing guiding principle:

maximize performance. Every circuit has been refined and every mechanical detail has been optimized.

Everything about the 1160 is executed to a spectacularly high standard. As a result, it is something very special – brilliant.

Features:

300 watt 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 operating temperature.

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 uses 56 output devices for excellent reliability, control, and power with any loudspeaker.

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 resolution and detail.

Dual power transformers are DC filtered and enclosed a welded steel case for perfectly silent operation.

SPECIFICATIONS:

CONTINUOUS POWER; 8, 4, 2 OHMS - 300W

PEAK POWER, 8 OHMS - 300W

PEAK POWER, 4 OHMS - 600W

PEAK POWER, 2 OHMS - 1200W

THD, 8 OHMS, 300W - 20-2 kHz: 0.0009%, 20 kHz: 0.0048%

THD, 4 OHMS, 300W - 20-2 kHz: 0.0016%, 20 kHz: 0.0071%

THD, 2 OHMS, 300W - 20-2 kHz: 0.002%, 20 kHz: 0.0130%

EQUIVALENT INPUT NOISE (EIN), 20 KHZ BW - 1.5 μV

MAGNITUDE RESPONSE, 20 TO 20 KHZ - +0.00, -0.04 dB

MAGNITUDE RESPONSE, -3 DB AT - 0.015 Hz, 150 kHz

VOLTAGE GAIN - 26 dB

SIGNAL TO NOISE RATIO (RE: 300W/8Ω) - -127 dB, unweighted, 20 to 22 kHz

INPUT IMPEDANCE - Balanced: 100k ohms,  Unbalanced: 50k ohms

COMMON MODE REJECTION (BALANCED ONLY) - 60 Hz: 90 dB, 10 kHz: 70 dB

INPUT CONNECTORS - 3-pin balanced XLR

OUTPUT CONNECTORS - Two sets of 6 mm / .250-inch wingscrews

CROSSTALK, L TO R OR R TO L - Greater than 120 dB

POWER REQUIREMENTS - 100, 110-120, 220-240 VAC, 50-60 Hz

POWER CONSUMPTION - 15W standby, 240W nominal, 3600W at maximum output

WEIGHT - Amplifier: 140 lbs. (63.5 kg),  Shipping: 220 lbs. (99.8 kg)