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 disconnects 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 Headphones 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 effect 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 sys-
tem. The Linked system units will be fully integrated with each other allowing 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 otherwise the unit will overheat and shut down.
1/4-inch T.R.S.
Phone Plug
Tip = 0°
Ring = 180°
Sleeve = Ground
3
XLR Plug
(Male)
Pin 1 = Ground
1
2
Pin 2 = 0°
3
Pin 3 = 180°
Balanced 1/4-inch T.R.S. to Balanced XLR