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Master Section
13. Master Control
The Master Volume controls the overall output level of the Block amplifier.
14. Headphones
The Headphones jack is a standard ¼-inch TRS (stereo) phone jack. When used, it discon-
nects the audio to the speakers so you can listen privately.
15. Balance (Link Pan)
Use the Link Pan control to adjust the balance of the left/right signals when using the Head-
phones or for left/right balance of the Linked Block amps.
16. Line Out (balanced)
Located at the front, this XLR jack is used primarily to connect directly to mixing consoles.
Use this when performing live or in a recording studio. The Master Volume control has no ef-
fect on the line out audio level.
Note: Please note that the signal from Channel 4 does not mix in with the main bus (Link)
signal and is not sent to the line out. It is meant for stage monitoring only
Post-EQ / Pre-EQ Selector
The Post-EQ / Pre-EQ selector enables the audio signal being sent through the Line
Out to either directly from the post gain stage (pre-tone controls) or after the tone
control stage.
Ground Lift
The Ground Lift switch was added to help prevent unwanted audible hum and buzz
that may occur if the unit's electrical ground is affected by 'ground loops' when
connected using the Line Out.
Link System
The Link feature of the Block series amplifiers allow two Block amps connected to operate as
a single stereo system. The Linked system units will be fully integrated with each other allow-
ing use of inputs on both amplifiers.
Note: the Line Outs of "each" unit will output only the source from that particular unit.
17. Link
Use a stereo cable to Link two block units to create a left and right stereo system. The Link
connection is designed to work only with the same model Block amplifier.
Link Pan Control
Use the Link Pan Control, located on the front panel to adjust the balance of the left/
right signals for the Block amps that are Linked.
Amplifier
18. Cooling system
Keep the rear of the Block Series amplifiers free and clear, this will allow the units to remain
as cool as possible, always keep that area clear so that the heat is dissipated properly other-
wise the unit will overheat and shut down.
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