Boulder 812 DAC Streamer Headphone Amp Preamp
Boulder 812 DAC Streamer Headphone Amp Preamp - Image 2
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Boulder 812 DAC Streamer Headphone Amp Preamp

BOULDER 812 DAC / Streamer / Headphone Amp / Preamplifier

Through the worldwide success of the 866, Boulder has expanded the 800 series with the 812 DAC, Preamplifier, headphone amp.

By applying the design philosophy from the 866, and over 35 years of experience designing DAC’s, preamps, and amplifier circuits, you get a device that has precision, top of the line performance. Plus the quality and reliability you would expect from a Boulder product, in a refined package.

The 812 is Boulder’s first headphone amp, and we didn’t hold back. It has a separate sophisticated headphone amplifier circuit, four types of connections, and headphone sensitivity settings within the Boulder Controller app. With 200mw into 8 ohms and 80mw into 600 ohms, the amplifier section in the 812 will drive any headphones or multiple headphones at once. 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.

The 812 is something for long-term Boulder fans, headphone enthusiasts, or for someone starting their first Boulder system. We wanted to create something accessible and multi-functional that could fit into any sound system or become the system itself. The 812 accomplishes that.

 

Manufacturer’s Website BOULDER

SKU: 000453 Categories: , , , Tags: , , , , , , , , ,

Boulder 812 features

  • 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.

Boulder 812 Specifications

Balanced Inputs: 2 x 3 pin XLR
Balanced Outputs: 1 x 3 pin XLR
Maximum Input Level: 6.0 Vrms
Maximum Output Level: 14.0 Vrms
THD+N: 2V Output, 2khz 0.0017% (–95.5 dB)
Maximum Voltage Gain: 19.4 dB
Volume Range: 100 dB
Volume Steps: 1.0 dB
Frequency Response: 20 Hz to 5kHz +0.00, –0.03 dB
Frequency Response: –3 dB 0.02 Hz & 250 kHz
Clip to Noise Ratio: 116 dB
Input Impedance: 100kΩ Balanced
Output Impedance: 100Ω Balanced
Power Requirements: 240V
Power Consumption: 50W Max
Headphone Amp Section: 2k Hz 20k Hz
32Ω 200mW Output: 0.0010% 0.0053%
150Ω 200mW Output: 0.0010% 0.0034%
600Ω 80 mW Output: 0.0011% 0.0043%

Weights and Dimensions
812 Integrated Chassis:

  • 12” W x 12” D x 3.25” H (12.5 lbs)
  • 30.5 cm W x 30.5 cm D x 8.3 cm H (5.67 kg)
  • Shipping: 24” W x 23” D x 14” H (18 lbs)
    61 cm W x 59 cm H x 36 cm H     (8.2 kg)

 

Please find review below

Boulder 812 Streamer / Preamp / Headphone Amp review in
“High Fidelity” Online Magazine, August 2022.
Complete review at https://highfidelity.pl/@main-1201&lang=en

Boulder 812 Streamer / DAC / Pre review by ” The Absolute Sound ” Magazine, February 2024
https://www.theabsolutesound.com/articles/boulder-812-dac-preamp/

 

Weight2 kg

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