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Boulder 860 150 Watt Stereo Power Amplifier Instruction Manual 6/13/07 Boulder Amplifiers, Inc. 3235 Prairie Ave. Boulder, CO 80301 www.boulderamp.com BOULDER REMOTE GETTING APPENDIX LINK CONTROL OPERATION STARTED
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B o u l d e r 8 6 0 S t e r e o 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 STARTED
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TABLE OF CONTENTS GETTING STARTED Placement of the 860 Stereo Power Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Connecting to the Mains Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Connecting a Balanced Source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Connecting an Unbalanced Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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APPENDIX Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 BOULDER REMOTE GETTING APPENDIX LINK CONTROL OPERATION START
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GETTING STARTED PLACEMENT OF THE 860 STEREO POWER AMPLIFIER Your Boulder 860 Stereo 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 amplifier is heavy, a solid, stable surface should be used. As the amplifier will generate some heat, there should be good air circulation around it. In particular, make certain that the heat sinks are not blocked. You may want
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CONNECTING TO THE MAINS OUTLET Your 860 Stereo Power Amplifier is supplied with a mains cord suitable for the location where it was purchased. It is constructed of a large enough wire gauge and a cable plug appropriate for the voltage you intend to use. Do not substitute another power cable. The voltage appears on the rear panel. If you require a different AC mains voltage, contact your dealer immediately. Exact voltage and frequency compatibility is stated in the specifications section. On
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CONNECTING A BALANCED SOURCE To fully realize the sonic potential of your 860 Stereo Power Amplifier, use balanced connections whenever possible. Balanced cables reduce interference from magnetic and RF sources to an absolute minimum. Connect your preamplifier or source outputs to the inputs provided. 1-3 GETTING STARTED
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CONNECTING AN UNBALANCED SOURCE Although the input connectors are of the three-pin XLR type, an unbalanced source is easily accommodated by using a special cable. This cable has an RCA phono type connector on the source end and a three- pin XLR connector to go to the input of the 860 Stereo Power Amplifier. The negative input (Pin 3) should be wired to ground only at the RCA phono connector. This brings the negative input reference of the 860 to the unbalanced source ground, thus reducing gr
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POLARITY Please note that the 860 Stereo Power Amplifier conforms to the standard of Pin 2 as the high or ”hot” for the balanced inputs. The polarity of the 860 Stereo Power Amplifier is such that a positive- going transition at Pin 2 will produce a positive-going transition at the “+” output terminal. CONNECTING YOUR LOUDSPEAKERS Do not use any wrenches on the loudspeaker binding posts! Tighten these connectors only by hand. WARNING: This is a high power amplifier! When driven, there is a
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OPERATION POWERING UP With all your connections made, you are ready to listen to your Boulder 860 Stereo 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. This power up sequence can be skipped by pressing and holding the STANDBY button until the indicator turns red; then release and it will start in about five seconds. To reduce the inrush
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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 860 Stereo 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. 2-2 OPERATION
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SHORTED OUTPUT DETECTION If the output of the amplifier becomes shorted, the front panel indicator will turn red and the amplifier will turn off the output stage for about three seconds, then very briefly try to turn on again. If the short still exists, this cycle will repeat until the short circuit is removed. THERMAL PROTECTION A thermal protection circuit prevents high case temperatures which are unpleasant to the touch and potentially harmful to the amplifier. The thermal cutout circuit
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REMOTE CONTROL OPERATION Operation of the Boulder 860 Stereo Power Amplifier by remote control is possible when connected by a Boulderlink cable to other Boulder preamplifiers or CD players. When so connected, the 860 Stereo Power Amplifier will be turned on and off with the other component. 12 VOLT TRIGGER The 860 Stereo Power Amplifier also provides a trigger input for remote on/off operation with other brands of equipment. With a trigger connection, the 860 will be on when the voltage i
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BOULDERLINK BOULDERLINK "DAISY CHAIN" TO ALL Boulderlink is a means of interconnecting most Boulder products OTHER so that their microprocessors can talk to each other and pass important SLAVE BOULDER BOULDER BOULDER UNITS PRE- POWER POWER information. Among the key features, Boulderlink allows sequential AMPLIFIER AMPLIFIER AMPLIFIER initiation of power amplifiers’ and other products’ power up when the MASTER SLAVE SLAVE ”master” component is turned on. Boulder power amplifiers can send me
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SETTING BOULDERLINK SWITCHES Every Boulderlink system must have one “MASTER” component, and only one component can be set to MASTER. This is usually the preamplifier. Power amplifiers and other products not having a MASTER/SLAVE switch are not eligible to be “MASTER.” SETTING BOULDERLINK ID NUMBERS Every component is required to have a unique Boulderlink ID number. Each Boulder 860 Stereo Power Amplifier has a thumbwheel switch on the rear panel. Start by setting the switch on the first am
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POWER UP VIA BOULDERLINK With each component connected together by a Boulderlink cable, and individually connected to the mains, pressing the master’s STANDBY pushbutton will initiate the turn on sequence of all components. The first time a master is powered up, it will search for any “slave” units connected to it. As the master finds each slave, the slave’s ID number will be shown on the display. If any of the connected slaves are amplifiers, then each time the master is turned on it will
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BOULDERLINK MESSAGES Each component in the system can send a message to the preamplifier which is then shown on its display. This is particularly helpful in confirming the operating status of each power amplifier in a multiple amplifier system. Typical messages on an 810 Preamplifier, 1010 Preamplifier or 1012 DAC Preamplifier are as follows. “AMPLIFIER 1 ERROR” means that an internal power supply has failed and the amplifier has turned itself off to protect the speakers from damage. “AMP
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BOULDER 860 STEREO POWER AMPLIFIER SPECIFICATIONS THD at Continuous Power, 20 to 2KHz 0.0035% THD at Continuous Power, at 20KHz 0.018% Continuous Power, 8 Ω 150W Continuous Power, 4 Ω 150W Peak Power, 8 Ω 150 W Peak Power, 4 Ω 300 W Magnitude Response, 20 to 2
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TROUBLESHOOTING SYMPTOM CAUSE REMEDY No power indication Power switch is not on Turn on rear panel power switch Power amplifier is not plugged in Connect to an AC outlet Home circuit breaker is tripped Reset circuit breaker Fuse on rear panel blown Replace fuse Red power indication Low line voltage Have line voltage checked Power supply breaker tripped Reset breakers on rear panel Defective amplifier Return to dealer for service Amber power indication, but sound not No signal from one channel of
