Boulder 810 Preamplifier

Sunny Components Inc 

1370 E Cypress Street, Suite D 

Covina, CA-91724 

www.sunnyaudiovideo.com 

626-966-6259. 

Hours: Tuesday - Friday 9-5 and Saturday 10-4.

Boulder’s 810 preamp delivers flexibility with astounding audio quality and massively outperforms its competitors, benefitting from trickle down technology from the reference 2100 and 3000 range.
There is no substitute for experience. Boulder’s proud history includes some of the finest preamplifiers ever made: the 2110, 2010, 1012 and 1010. Each has earned multiple awards, praise and accolades and are examples of the very best available. You can now add the 810 preamplifier to that list.

• Boulder’s precise stepped volume control, descended from the 2010 Preamplifier

• Supervising microprocessor oversees all functions and communicates with other Boulders

• 12V trigger connection to control power-up of remote amplifiers

• Two pairs of main outputs for use in bi-amped systems and a third set of fixed-level outputs for secondary systems or recorders

• Surface mount circuit board layout minimizes connection resistance and inductance and enables smaller board design

• IR remote connection allows use with external control systems and maintains Boulder Link control with Boulder amplifiers

• Fully-regulated power supply with additional power line noise filter

• Two toroidal transformers, one for analogue and one for logic, to prevent the controls from having any effect on sound quality

• Left and right audio channels are each encased in steel boxes to improve isolation

Specification:

• Balance Line Inputs: 4

• Main Balanced Outputs: 2

• Record Balanced Outputs: 1

• Maximum Input Level: 6.0 Vrms

• Maximum Output Level: 14.0 Vrms

• THD+N, 2V Output, from 20 Hz to 20 kHz: Less than 0.0045%

• Output loaded with 150Ω: Less than 1 dB distortion change, 20 – 10 kHz

• Maximum Voltage Gain, Line input: 20 dB

• Volume Range: 100 dB

• Volume Steps: 0.5 dB ±0.05 dB (200 Steps)

• Record Path Gain, Balanced Output: 8.5 dB

• Record Path Gain, Unbalanced Output: 2.5 dB

• Frequency Response, 20 Hz to 20 kHz: +0.00, -0.03 dB

• Frequency Response, -3 dB at: 0.07 Hz & 250 kHz

• Clip to noise ratio: 118 dB

• Crosstalk, L to R or R to L: -113 dB or better 20 Hz to 20kHz

• Crosstalk, Adjacent Inputs: -113 dB or better 20 Hz to 20kHz

• Input Impedance: 100kΩ Balanced

• Output Impedance: 100Ω Balanced, 50Ω Unbalanced

• Preamp Size, W x H x D: 17.0 x 5.50 x 15.25 inches

• Weight: 18 pounds, Shipping: 26 pounds
• Power Requirements: 100 / 120 / 220-240 V, 50-60 Hz, 22 W Max, 3 W Standby

California residents add 9.5% sales tax.

Credit Card and PayPal add 3% fee.