Boulder 812 DAC Preamplifier Headphone Amplifier
10500
Boulder the 812 DAC Preamplifier headphone amp – brand new. Producing 200mw into 8 ohms and 80mw into 600 ohms. The amplifier section in the 812 will drive any headphones or multiple headphones at once. As you can see design philosophy from the 866, has been applied to the 812.
Boulder have over 35 years of experience designing DAC’s, preamps, and amplifier circuits. As a result, you get a device that has precision, top of the line performance. Plus the quality and reliability you would expect from a Boulder product.
The 812 is Boulder’s first headphone amp, and they didn’t hold back. It has a separate sophisticated headphone amplifier circuit. It has four types of connections, and headphone sensitivity settings within the Boulder Controller app. It is a headphone enthusiast’s dream come true.
It can be used just as a preamp, a DAC, a headphone amp or any combination of the three. With all the features and its versatility, the 812 is perhaps the highest value product Boulder has ever produced.
Sophisticated headphone amplifier. Allows for 1/8″ mini, 1/4″, 4-pin balanced and Pentaconn headphones.
Streaming capabilities, Roon endpoint, UPnP playback, Air-Play functionality and Bluetooth.
A software-enabled fixed DAC out option.
A dedicated Boulder app controls the 812 and makes custom setup adjustments, like headphone sensitivity. Optional RF remote for volume control and switching inputs also available
Two pairs of balanced analog inputs. One pair of balanced analog outputs. Two Toslink optical inputs, one coaxial input and one USB-B input.
Along with assembly and testing, every circuit board and piece of metalwork is produced in-house at Boulder’s dedicated facility for unparalleled quality assurance.
In-house manufacturing efficiency improvements have made the 812 an incredible value in comparison to previous preamplifiers and DACs.
Stylish headphone bay cover to keep dust out of headphone jacks.
Easily switch between headphone and preamp mode with the output exchange button.
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CONNECTIONS
(FRONT)•4-Pin XLR Headphone Connector
•1/8” Headphone Connector
•1/4” Headphone Connector
•Pentacon Headphone Connector -
CONNECTIONS
(BACK)•2 Pair XLR Analog Inputs
•1 Pair XLR Preamplifier Output
•4x USB Host
•Ethernet
•USB-B
•2 Optical Digital Inputs
•Coaxial (RCA, SPDIF) Digital Input -
SOFTWARE FEATURES
•Based on 866 DSP Filter and DAC topology
•Configurable Headphone Sensitivity
•Available Fixed DAC out
•HTML Programming
•Control through Boulder Controller App
•Input Trim -
HARDWARE FEATURES
•Switch Between Headphone and Preamp Outputs
•Volume Knob & Chassis Machined In House
•100 db Optically Encoded Volume Control
•Innovative Protection Circuits -
MAXIMUM INPUT LEVEL
6.0 Vrms
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MAXIMUM OUTPUT LEVEL
14.0 Vrms
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THD+N, 2V OUTPUT, 2KHZ
.0017% (-95.5 dB)
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MAXIMUM VOLTAGE GAIN
19.4 dB
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VOLUME RANGE
100 dB
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VOLUME STEPS
1.0 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
.02 Hz & 250 kHz
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CLIP TO NOISE RATIO
116dB
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INPUT IMPEDANCE
100kΩ Balanced
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OUTPUT IMPEDANCE
100Ω Balanced
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POWER REQUIREMENTS
90-240V
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POWER CONSUMPTION
50W Max
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HEADPHONE AMP SECTION
32Ω 200MW OUTPUT
2k Hz 20k Hz
0.0010%. 0.0053%
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HEADPHONE AMP SECTION
150Ω 200MW OUTPUT
2k Hz 20k Hz
0.0010% 0.0034%
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HEADPHONE AMP SECTION
600Ω 80MW OUTPUT
2k Hz 20k Hz
0.0011% 0.0043%
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DIMENSIONS
12”x12”x 3.5”
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WEIGHT
14 lbs
