Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Boulder 850
Summary of Contents for Boulder 850
-
Page 2: Owners Manual
Boulder 850 200 W Mono Power Amplifier Owners Manual 11/25/05 Boulder Amplifiers, Inc. 3235 Prairie Ave. Boulder, CO 80301 www.boulderamp.com BOULDER REMOTE GETTING APPENDIX LINK CONTROL OPERATION STARTED... - Page 3 B o u l d e r 8 5 0 P o w e r A m p l i f i e r R e a r P a n e l BOULDER REMOTE GETTING APPENDIX LINK CONTROL OPERATION...
-
Page 4: Table Of Contents
Placement of the 850 Power Amplifier........ - Page 5 Notes ..............5-3 BOULDER...
-
Page 6: Getting Started
G ETTI NG START ED PLACEMENT OF THE 850 POWER AMPLIFIER Your Boulder 850 Power Amplifier is designed to reduce interference from external magnetic and radio fields (RF). While placement is not critical, known magnetic fields should be avoided. Because the power amplifier is heavy, a solid, stable surface should be used. -
Page 7: Connecting To The Mains Outlet
Exact voltage and frequency compatibility is stated in the specifications section. Once the 850 Power Amplifier is connected to a live mains outlet, the power switch can be switched on by pressing the ”–” part of the rocker. -
Page 8: Connecting A Balanced Source
CONNECTING A BALANCED SOURCE To fully realize the sonic potential of your 850 Power Amplifier, use balanced connections whenever possible. Balanced cables reduce interference from magnetic and RF sources to an absolute minimum. Connect your preamplifier output to the input provided. -
Page 9: Connecting An Unbalanced Source
Boulder ABL2 Input Adapter. It converts a balanced input into a RCA phono input right at the rear of the 850. Like the above cable, the minus input of the 850 is connected to the ground of the RCA phono. However, this minus side will then share the shield wire with the chassis ground and will not have very good hum rejection. -
Page 10: Polarity
POLARITY Please note that the 850 Power Amplifier conforms to the standard of pin 2 as the high or hot pin for the balanced input. The polarity of the 850 Power Amplifier is such that a positive-going transition at pin 2 will produce a positive-going transition at the “+”... -
Page 11: Operation
POWERING UP With all your connections made, you are ready to listen to your Boulder 850 Power Amplifier. To turn the amplifier on, press the STANDBY button on the front panel. The amplifier will perform a warm up cycle and the indicator will alternate between red and amber for 45 seconds. -
Page 12: Clip Detection
CLIP DETECTION Clipping of the waveform results when any amplifier is driven at too high a level. A clip detection circuit is included in the 850 Power Amplifier. The indicator will indicate clipping by momentarily turning from amber to red. Both voltage and current modes of clipping will be detected, although generally it is only voltage clipping which occurs. -
Page 13: Shorted Output Detection
If this happens, more ventilation should be provided for the amplifiers. MAINTENANCE No routine maintenance is required for the Boulder 850 Power Amplifier. However, to keep operating temperatures at a minimum, do not block the heat sink fins, and remove any dust buildup that may occur. -
Page 14: Remote Control Operation
With a trigger connection, the 850 will be on when the voltage is +5 to +12 volts, and off when the voltage is 0 volts. The tip of the mini phone plug should be positive with respect to the sleeve. -
Page 15: Boulderlink
Boulderlink ID and Master/Slave switches. Boulderlink cables in various lengths are available as an accessory from your Boulder dealer. Two connectors are provided on the back of the 850 and other Boulderlink enabled products. All the chassis are connected together in a daisy chain manner. Start by connecting one chassis to another–then from that chassis to the next... -
Page 16: Setting Boulderlink Switches
Every component is required to have a unique Boulderlink ID number. Each Boulder 850 Power Amplifier has a thumbwheel switch on the rear panel. Start by setting the first switch to 0 or 1 and then going up from there without any duplication. Use of the lowest numbers will speed up turn on as each amplifier is allowed about three seconds before the next. -
Page 17: Power Up Via Boulderlink
Boulderlink IDs should be set to the lowest sequential numbers possible. For example, use 0, 1, and 2 instead of 13 , 14, and 15. An amplifier set to ID 15 will take 47 seconds to turn on. BOULDER LINK... -
Page 18: Boulderlink Messages
Boulderlink. Its Boulderlink cable may have become disconnected, or the mains power has been disconnected. “UNIT 1 IS ONLINE” means that the slave is now responding via Boulderlink in a normal manner and has been recognized by the master. BOULDER LINK... - Page 19 BO UL DE R 8 50 P O W ER AM PL IFI ER SPECI FI CATI ONS THD at Continuous Power, 20 to 2KHz 0.0016% THD at Continuous Power, at 20KHz 0.009% Continuous Power, 8 Ω 200 W Continuous Power, 4 Ω 200 W Continuous Power, 2 Ω...
- Page 20 TROUBLESHOOTING SYMPTOM CAUSE REMEDY No power indication Power switch is not on Turn on power switch Power amplifier is not plugged in Connect to an AC outlet Home circuit breaker is tripped Reset circuit breaker Red power indication Low line voltage Have line voltage checked Power supplyʼs breakers tripped Reset breakers on rear panel...
- Page 21 NOTES APPENDIX...
Need help?
Do you have a question about the 850 and is the answer not in the manual?
Questions and answers