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The 1160 is the successor to the 1060 Amplifier & the first product in the new 1100 Series to debut. This is Boulder’s mid-level product line, combining new technology, including IP network connectivity for control & monitoring, & exceptional performance.
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 Stereo Power Amplifier, recognized by media and editors in the US, Taiwan, France, China, England, Japan, Poland, Hong Kong, and Italy with eleven awards for exceptional ability. 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 exactly what you would expect: brilliant.
The 1100 Series is Boulder’s mid-level product line, combining new technology and exceptional performance with reduced size, power and cost. The 1100 Series offers a substantial advancement over the previous 1000 Series, with improvements in sound quality by way of better thermal management, ground paths, noise floor, and circuit layout. The increased use of surface-mount technology, manufactured on Boulder’s own surface-mount manufacturing machines and ovens, has also yielded improvements in noise radiation, propagation delay, parasitic capacitance and the elimination of lead inductance in affected circuits. It also offers improvements in unit-to-unit quality and consistency and long-term reliability.
Also new for the 1160 is the use of a 64-bit, multi-core ARM ( Advanced RISC Machine ) processor for all supervisory functions, including management of protection circuits, AC line monitoring, power, thermal detection, error notification, and HTML- or IP-based external control. This ARM processor will also enable the use of Boulder Net, an IP-based unit-to-unit detection, system layout, and communication architecture available to external control systems such as Savant or Crestron and application-based system controls. For units that are network connected, an HTML setup and control page is available by simply logging into the amplifier’s IP address via a browser.
Gain stages within the 1160 are Boulder’s proprietary 983, which are unique to the 1100 Series. 983 gain stages feature surface-mount mechanical design with board-mounted heatsinking and provide the initial 20 dB of gain in a multi-stage design for exceptionally wide bandwidth. They combine discrete and monolithic design with a high-current output.
The 1160 utilizes 56 bipolar output devices (28 per channel), 48 filter capacitors and 2 toroidal power transformers to generate power output of up to 300 watts per channel into any load, enabling massive current swings and the ability to drive any loudspeaker to realistic audio levels.
Continuous power output of the 1160 is 300 Watts per channel into 8 ohms, with peak output power doubling into 4 ohms (600W), 2 ohms ( 1200 Watt ). All audio circuitry is full differentially balanced. Outputs include dual connections for bi-wiring. Full specifications for the 1160 are as follows:
Continuous power, 8, 4, 2 OHMS: 300 Watts
Peak power, 8 ohms: 300 Watt
Peak power, 4 ohms: 600 Watt
Peak power, 2 ohms: 1200 Watt
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 wing-screws
Crosstalk, L to R or R to L: Greater than 120 dB
Weight: Amplifier, 140 lbs. ( 63.5 kg ); Shipping, 220 lbs. ( 99.8 kg )
Power requirements: 100, 110-120, 220-240 VAC, 50-60 Hz
Power consumption: 15 Watt standby, 240 Watt nominal, 3600 Watt at maximum output