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Summary of Contents for Boulder 810
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Page 2: Owners Manual
Boulder 810 Preamplifier Owners Manual 6/8/06 Boulder Amplifiers, Inc. 3235 Prairie Ave. Boulder, CO 80301 www.boulderamp.com BOULDER REMOTE GETTING APPENDIX RECORDING LINK PROGRAMMING CONTROL OPERATION STARTED... - Page 3 B o u l d e r 8 1 0 P r e a m p l i f i e r R e a r P a n e l BOULDER REMOTE GETTING APPENDIX RECORDING LINK PROGRAMMING CONTROL OPERATION...
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Page 4: Table Of Contents
Placement of the 810 Preamplifier ........ - Page 5 Reset to Factory Defaults ........... . 4-9 BOULDER...
- Page 6 Notes ..............7-4 BOULDER...
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Page 7: Getting Started
We at Boulder Amplifiers are certain it will provide years of listening pleasure. QUICK START To get started listening, you only need to connect the 810 as you would any other preamplifier, but you should take note of the following. WARNING: The volume control is attractive and because it is optical and has no stops, it is tempting to just spin it. -
Page 8: Placement Of The 810 Preamplifier
PLACEMENT OF THE 810 PREAMPLIFIER Your Boulder 810 Preamplifier is designed to reduce the effects that external magnetic and radio fields (RF) have on its internal circuitry. While placement is not critical, known magnetic fields should be avoided. Line of sight from the listening position is necessary for the remote control to function properly. -
Page 9: Connecting To The Mains Outlet
Make certain that the mains voltage used is within the specifications shown. Also listed are the fuse ratings. There are two fuse holders on the rear of the 810, one for each of the digital and analog power transformers. Use only specified fuses. Check with a qualified service person first. -
Page 10: Polarity
POLARITY Please note that the 810 Preamplifier conforms to the standard of pin 2 as the positive or hot pin for all analog balanced inputs and outputs. Because input and output polarities are handled through programming setups and the remote control, no concern for polarity is needed while connecting sources. -
Page 11: Connecting An Unbalanced Source
Boulder ABL input adapter. It converts a balanced input into a RCA connector input right at the rear of the 810. Like the above cable, the negative input of the 810 is connected to the ground of the RCA connector. However, this negative side will then share the shield wire with the chassis ground and will not have the best hum rejection. -
Page 12: Connecting To A Balanced Input Amplifier
Connect each amplifier input to the main outputs labeled “MAIN OUT.” If it is desired to use 2 or more amplifiers such as in bi-amping, splitters will be required. If in doubt, consult your Boulder dealer. GETTING STARTED... -
Page 13: Connecting To An Unbalanced Input Amplifier
CONNECTING TO AN UNBALANCED INPUT AMPLIFIER A special cable is required to make this connection. This cable connects pin 1 to the shield and pin 2 to the center pin. It leaves the output pin 3 unconnected. Connecting the unused output pin (usually pin 3) to ground will cause excessive ground currents and degrade performance. -
Page 14: Setting The Boulderlink Switch
SETTING THE BOULDERLINK SWITCH When using the 810 with only power amplifiers, the Boulderlink MASTER / SLAVE switch should be set to MASTER. For more information on Boulderlink, see the Boulderlink section as indicated by the finger tab below. GETTING... -
Page 15: Operation
Power is applied only to the microprocessor during this mode. Press the STANDBY button to turn on the 810. The indicator will change to amber and power will be applied to the audio section. During the power up sequence, the displays at left will be briefly shown. -
Page 16: Input Selections
INPUT SELECTIONS To select an input, press one of the pushbuttons labeled ONE, TWO, THREE or FOUR. The respective input will be shown in the display and that signal will be routed to both the main and record outputs. For example, if input ONE is chosen, “1. -
Page 17: Volume
Because the precise feel of the Boulder 810’s volume control may be different than you are used to, we recommend starting the source device so that an audio signal is fed to the 810 before increasing the volume. The display will show “VOLUME INFINITE” to indicate maximum attenuation or no sound. -
Page 18: Balance
BALANCE To change the level balance, press the BALANCE pushbutton. “BALANCE CENTERED” will show in the display. Now, rotating the control will change the balance instead of the volume for as long as “BALANCE...” is displayed. Turning the control counterclockwise (left) will cause an indication such as “BALANCE R -2.0dB <... -
Page 19: Mute
After several seconds of not changing the balance, the display will return to the “VOLUME...” indication. You may also return to controlling volume by again pressing the BALANCE pushbutton. The balance resolution is the same as for the volume control, 0.5 dB steps. WARNING: If the input is programmed to be in “THEATER MODE,”... -
Page 20: Display
DISPLAY The display brightness may be set to any of 4 brightness levels. To change the brightness level, press the DISPLAY pushbutton. “DISPLAY 100%” will show in the display. Rotate the center control until the desired brightness is obtained such as “DISPLAY 50%.” The number in the display is the relative brightness. -
Page 21: Remote Control
REM OTE CONT ROL BATTERIES A standard small flat blade screwdriver is required to install the three AAA batteries. To install batteries in the remote control, it is necessary to separate the two sections. WARNING: When opened, the pushbutton balls will be loose and care must be taken to properly retain them. -
Page 22: Source Selection
SOURCE SELECTION To select an input (source) press one of the four buttons on the left side of the remote control. You will now be listening to your desired source, and it will be showing in the display. VOLUME, BALANCE and MUTE To increase the volume, press the button marked with an up arrow. -
Page 23: Polarity
0 to 360 degrees, the correct term of polarity is preferred to indicate the 180º phase change, or inversion, available in the 810 Preamplifier. By using the remote control, the polarity of both channels may be changed simultaneously at the main outputs during any listening mode. -
Page 24: Programming
PROGRAMMI NG While it is not necessary to ever use any programming functions, you will find they maximize the enjoyment of your Boulder 810 Preamplifier. Each input has several programmable features associated with it. These include assigning an alphanumeric name of your choosing, setting an individual offset attenuation and balance, correcting polarity, and setting theater mode. -
Page 25: Input Polarity
NOTE: The space character is just before the exclamation mark (!). INPUT POLARITY Input polarity is used to match the 810’s input polarity to that of each individual source. If uncertain of a particular source’s polarity, check the source’s owners manual or consult with its manufacturer. -
Page 26: Input Level Calibration
INPUT LEVEL CALIBRATION Pressing the same input source number will make “INPUT LEVEL 0.0dB” show in the bottom display row. Rotating the volume control will change the display and the main outputs’ levels simultaneously. This allows calibration of each input with test tones if desired. For example, setting the display to “-6.0dB”... -
Page 27: Input Balance Calibration
INPUT BALANCE CALIBRATION Pressing the same input source number will make “INPUT BAL CENTERED” show in the bottom display row. Rotating the volume control will simultaneously change the display and the main output’s balance so that the action can be monitored or measured. For example, setting the display to “R -9.0dB”... -
Page 28: Theater Mode
THEATER MODE When the 810 preamplifier is used in a surround sound theater system, it is normally desired to bypass the volume control, thus letting the surround processor control the volume. WARNING: Setting an input to THEATER MODE forces the volume to unity gain. -
Page 29: Start Volume
START VOLUME When changing inputs, it is possible to have the 810 go to a preset volume level every time the input is selected. Pressing the same input source number will make “START VOL? NO CHANGE” show in the bottom display row. Rotating the volume control will allow you to choose -50, -60, -70, -80, or -90 dB as the new preset level. -
Page 30: Programming By The Display Button
Several special features are programmed by pressing and holding the DISPLAY pushbutton until the display changes indicating you are in a programming mode. If no action is taken for some time, then the 810 reverts back to normal operation. The sequence is as follows. -
Page 31: Boulderlink Id
BOULDER LINK, BOULDER LINK ID 20” show in the display. Rotating the volume control changes the ID number. For more information consult the Boulderlink section. Unless you are using two or more 810 Preamplifiers together, this setting should be left at “20.” REMOTE ID Again pressing the DISPLAY pushbutton will make “PROGRAM... -
Page 32: Reset To Factory Defaults
The microprocessor and PROM version numbers are momentarily displayed. All other pushbuttons are inoperative during this time. The 810 Preamplifier will then return to normal operating mode and initiate a power up sequence. -
Page 33: 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 810 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 34: Connecting 800 Series To 1000 Or 2000 Series With Boulderlink
CONNECTING 800 SERIES TO 1000 OR 2000 SERIES WITH BOULDERLINK If you are using the 810 Preamplifier with other Boulder products, a Boulder Link Adapter Box (BLAB) is required to make the connection. Although the connectors are mechanically different between the series, they are electrically the same, thus allowing the series to be mixed. -
Page 35: Setting Boulderlink Switches
SETTING BOULDERLINK ID NUMBERS Each component is required to have a unique Boulderlink ID number. The 810 ID is preset to 20 at the factory and/or when a master reset sequence is executed. If multiple preamplifiers are connected together, see pages 4-5 through 4-6 for instructions on how to change the ID numbers of the additional units. -
Page 36: Power Up Via Boulderlink
810’s STANDBY pushbutton will initiate the turn on sequence of all components. The first time a “MASTER” 810 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. -
Page 37: Boulderlink Messages
BOULDERLINK MESSAGES Each component in the system can send a message to the 810 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. “AMPLIFIER 1 ERROR” means that an internal power supply has failed and the amplifier has turned itself off to protect the speakers from damage. - Page 38 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...
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Page 39: Recording
CONNECTING A RECORDING DEVICE A recording device may be connected to the 810 Preamplifier. You may use balanced or unbalanced connections as previously described in the sections on connecting power amplifiers. See pages 1-8 and 1-9. -
Page 40: Appendix
APPENDIX... -
Page 41: Specifications
BOULDER 810 PREAMPLIFIER SPECIFICATIONS Balance Line Inputs Main Balanced Outputs Record Balanced Outputs 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... -
Page 42: Troubleshooting
TROUBLESHOOTING SYMPTOM CAUSE REMEDY No power indication Preamplifier is not plugged in Connect to an AC outlet Fuse open or missing Reinsert or Replace Fuse Analog source selected, Amber power No signal from source Check source controls, cables and indication but sound not heard from either connections channel No signal to power amplifier... -
Page 43: Notes
NOTES APPENDIX...
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