Rear Panel Description; 4" Source Inputs; 8" Stereo Line Input; Mon Outputs - Mackie Big Knob Passive Owner's Manual

Rear Panel Description

The rear panel is where to connect various sources
feeding IN to the Big Knob Passive. These signals are
then routed through the Big Knob Passive and released
through the monitor OUT jacks.
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1. 1/4" Source Inputs

Connect the L/R line-level signals from the source(s)
to the 1/4" source input jack(s).
• The source input connectors accept balanced
or unbalanced signals.
• Unbalanced TS (tip-sleeve) lines can be accommodated
via the TRS jack. Make sure the cable terminates with
a TS plug (like a guitar plug), or if it's a TRS plug (such
as a headphone plug), make sure the ring is tied to the
sleeve and that the plug is fully inserted into the jack.
The connectors are wired as follows (per the AES/IEC
standard):
Balanced 1/4" TRS
Hot (+)
Cold (–)
Shield (Ground)
Balanced 1/4" Connectors
Unbalanced 1/4" TS
Hot (+)
Cold (–)
Shield (Ground)
Unbalanced 1/4" Connectors
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1
Tip
Ring
Sleeve
RING SLEEVE SLEEVE RING TIP
TIP
RING
TIP
SLEEVE
Tip
Ring
Sleeve
SLEEVE SLEEVE TIP
TIP
TIP
SLEEVE

2. 1/8" Stereo Line Input

The stereo line input may accept an 1/8" line-level
signal from a smartphone, MP3 player, or other signal
source.
The Source Input B 1/4" and 1/8" line-
level connections may be connected
simultaneously. If both inputs are
connected simultaneously, the 1/8" stereo
line input will take priority over the 1/4" connection.

3. 1/4" Mon Outputs

Connect the L/R mon outputs to the inputs of powered
studio monitors or to a power amplifier driving passive
speakers.
The mon outputs are fed by the "control room bus."
This is the signal path fed from the source input
currently selected with the source select button and
routed through the volume knob.
• The mon output connectors accept balanced
or unbalanced signals.
• Unbalanced TS (tip-sleeve) lines can be accommodated
via the TRS jack. Make sure the cable terminates with
a TS plug (like a guitar plug), or if it's a TRS plug (such
as a headphone plug), make sure the ring is tied to the
sleeve and that the plug is fully inserted into the jack.
The connectors are wired per the AES/IEC standard
as seen in the illustrations to the left.
Owner's Manual
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