Full Manual

Mackie Channel Strip

This document shows the physical layout of a single channel strip on a Mackie analog mixer, with each control labeled by function. Unlike the signal flow diagram below (which shows how audio moves through the channel electronically), this reference shows where each control lives on the face of the mixer — reading top-to-bottom the way your eyes and hands travel down the channel during setup and mixing.

Top to Bottom: The Channel Strip

GAIN / TRIM

At the very top of the channel is the gain knob (labeled "MIC GAIN"), used to set the input level. The range runs from +15 dB to -45 dB (with a typical unity mark near the middle). This is the first thing you set when plugging in a source — too low and you'll have a weak, noisy signal; too high and the channel will distort. (See LEVEL LEDs for additional info)

AUX SENDS

Below the gain are the aux send knobs, used to route a portion of the channel's signal to the mixer's auxiliary buses (for monitor mixes, effects, etc.). Each knob ranges from −∞ (off) to +15 dB with a unity (U) mark. The layout shows:

Aux 1 and Aux 2 — two dedicated sends
Aux 3 / 5 and Aux 4 / 6 — shared knobs that switch function based on the 5/6 SHIFT button below them
A PRE switch determines whether the send is taken pre- or post-fader

EQ SECTION

The 3-band EQ sits in the middle of the strip:

HI — high-frequency shelf at 12 kHz, ±15 dB
MID — sweepable mid with a frequency knob (100 Hz – 8 kHz range, typically centered around 800 Hz – 2 kHz) and a ±15 dB gain knob
LOW — low-frequency shelf at 80 Hz, ±15 dB
LOW CUT — a high-pass filter button (75 Hz, 18 dB/octave) to remove rumble

PAN

Below the EQ, the pan knob places the channel in the stereo field, sweeping from L to R.

MUTE

The MUTE button silences the channel. The number (here "1") indicates the channel number.

LEVEL LEDS

Two small LEDs next to the fader show signal activity:

OL (overload) — lights when the channel is clipping
−20 — lights when signal is present at a healthy level

These help you set proper gain and watch for overloads during performance.

SOLO

The SOLO button isolates this channel for monitoring — lets you hear just this channel in your headphones or control room output without affecting the main mix.

ASSIGN Buttons

Three routing buttons determine where the post-fader signal is sent:

1–2 — assigns to subgroup bus 1/2
3–4 — assigns to subgroup bus 3/4
L–R — assigns to the main stereo output

A channel can be assigned to any combination of these simultaneously.

FADER

At the bottom, the channel fader sets the overall level of the channel in the mix, running from −∞ (off) up through unity and into positive gain.

Summary

Reading the strip top to bottom mirrors a typical workflow: set gain first, dial in aux sends for monitors/effects, shape tone with the EQ, place the signal with pan, use mute and solo as needed, watch the level LEDs, pick your assigned outputs, then ride the fader for the mix.

Mackie Channel Signal Flow

This document is a block diagram showing the signal path through a single channel on a Mackie analog mixer — tracing how audio travels from the input jack through the channel's processing stages and out to the various destinations (main stereo outs, sub groups, direct out, and aux sends).

The Main Signal Path

Audio flows left-to-right through the channel strip in this order:

INPUT — the physical jack where your source (mic, instrument, line-level device) enters the channel
TRIM — input gain stage that sets the proper signal level for the channel
INSERT — send/return point for patching in external processing (compressors, effects, etc.)
LOW CUT — high-pass filter to remove low-frequency rumble
EQ — tone-shaping equalizer
MUTE — a switch that silences the channel when engaged
FADER — the channel volume control
PAN — places the signal in the stereo field (left-to-right)
ASSIGN — routes the post-fader signal to the chosen stereo output bus

Output Destinations

After the assign stage, the signal can be sent to any of the Stereo Outs:

L/R — the main mix output
1/2 — subgroup bus 1/2
3/4 — subgroup bus 3/4

A channel can be assigned to any combination of these buses simultaneously.

The Direct Out

A Direct Out tap is taken immediately after the fader (post-fader, post-mute), providing a mono feed of that single channel. This is useful for multitrack recording — each channel can be sent to its own recorder input independently of the main mix.

Aux Sends and the Pre/Post Switch

The channel feeds two auxiliary sends, AUX 1 and AUX 2, which are commonly used for monitor mixes or effects sends. A PRE SWITCH determines where the aux send taps the signal from:

"PRE" signal — taken before the fader and mute (after EQ). The aux send level is independent of the channel fader — useful for stage monitor mixes, where the performer's monitor level should stay constant even when the front-of-house fader moves.
"POST" signal — taken after the fader and mute. The aux send level follows the fader — useful for effects sends (reverb, delay), so the effect level tracks the channel's mix level.

Each aux send has its own level knob (shown as AUX 1 and AUX 2 with their rotary controls) before going to the aux output buses.

Summary of Channel Signal Flow

A signal entering the channel is gained, filtered, EQ'd, muted (or not), and faded — then it splits three ways: to the assign matrix for the main stereo/subgroup mix, to the direct out for isolated recording, and to the aux sends (pre- or post-fader) for monitors and effects.

Control Room Out

Mackie Output Section

Mackie Documentation

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