Specifications

APPENDIX
7-2
BOULDER 810 PREAMPLIFIER SPECIFICATIONS
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.