Marantz Rack Mix 12 User manual

User Guide English ( 2 – 5 )
Guía del usuario Español ( 6 – 9 )
Guide d’utilisation Français ( 10 – 13 )
Guida per l’uso Italiano ( 14 – 17 )
Benutzerhandbuch Deutsch ( 18 – 21 )
A
ppendix English ( 22 – 23 )

2
User Guide (English)
Introduction
The Rack Mix 12 is an ultra-slim 1U rack-mounted 12-channel mixer with 6 mic/line combination
inputs and 6 additional line inputs. It has balanced XLR outputs, a 1/4” (6.35 mm) mono output
that can be used to connect the Rack Mix 12 to a remote mixer, a pair of RCA stereo outputs
that can be used to connect to a remote recording device, and 1/4” (6.35 mm) mic monitoring
port that can be used to monitor the mics’ signals. The Rack Mix 12 provides individual volume
control for all inputs in addition to volume control for the mono output port and a master volume
control. It has a 3-level equalizer and a controlled priority for Mic/Line 1. It can be powered from
standard AC or 24 V DC power source.
Please see this guide’s Setup chapter to learn how to integrate Rack Mix 12 with your audio
system.
Box Contents
Rack Mix 12
Rack Ears
(6) Rack Ear Screws
Power Cable
User Guide
Safety & Warranty Manual
Support
For the latest information about this product (system requirements, compatibility information,
etc.) and product registration, visit marantzpro.com.

3
Features
Front Panel
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1. Power Switch: Use this switch to power Rack Mix 12 on or off.
2. Power Light: This light illuminates when Rack Mix 12 is powered on.
3. Mic In Level: Turn these knobs to set the input level of the corresponding mic/line inputs
(Channels 1–6).
4. Stereo In Level: Turn these knobs to set the input level of the corresponding line inputs
(Channels 7/8–11/12).
5. Signal (Sig) Lights: Indicates that the channel’s incoming audio signal is within an optimal
range.
6. Mic Level: Turn this knob to set the input level of the Mic Monitor output. Use the Mic
On/Off button to enable to disable it.
7. Mic On/Off: Press this to turn enable or disable the Mic Monitor output. When the button is
depressed (in the down position), the signal from the mic/line inputs (Channels 1–6) will be
sent to the Mic Monitor output, and the Line Outs will be disabled. When the button is
raised (in the up position), the Mic Monitor output will be disabled, and all channels will be
sent to the Line Outs.
8. EQ: Turn these knobs to increase (“boost”) or reduce (“cut”) the amount of bass frequencies
(Low), mid-range frequencies (Mid), and treble frequencies (High) of the main mix.
9. Mono Level: Turn this knob to adjust the level of the Mono Out.
10. Master Level: Turn this knob to adjust the level of the Line Outs, Mono Out, and Rec Out.
11. Level Meters: These lights indicate the audio level of the Line Outs, Mono Out, and Rec Out.
The Clip light can light up occasionally, but if it happens too often, reduce the volume of the
mix and/or individual channels.

4
Rear Panel
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1. AC Power Input: Use the included power cable to connect this input to a power outlet.
Alternatively, use the DC power input, described below. (If both power inputs are connected
to power outlets, Rack Mix 12 will draw its power from the AC power input.)
2. Fuse Cover: If the fuse is broken, use a screwdriver or other tool to lift this tab, and replace
the fuse with a fuse with the same rating. Using a fuse with an incorrect rating can damage
the unit and/or fuse.
3. DC Power Input: Use a separate DC power supply to connect this input to a power outlet.
Alternatively, use the AC power input, described above. (If both power inputs are connected
to power outlets, Rack Mix 12 will draw its power from the AC power input.)
4. Mic/Line Inputs (Channels 1–6):Connect microphones or line-level devices to these inputs
with XLR or 1/4” (6.35 mm) cables.
5. Input Selector (Channels 1–6):Use these switches to set what type of audio source is
connected to each mic/line input: a microphone without phantom power (Mic), a
microphone with +18–21V of phantom power (Ph), or a line-level device (Line).
Note: Most dynamic microphones do not require phantom power, while most condenser
microphones do. Consult your microphone’s documentation to find out whether it needs
phantom power.
6. Mic 1 Priority: Turn this knob to set how loud the volume level of all other inputs will be
when the Channel 1 mic/line input receives an incoming signal. At its lowest setting, a signal
received by the Channel 1 mic/line input will mute all other input signals entirely. At its
highest setting, a signal received by the Channel 1 mic/line input will not affect the other
input signals at all.
7. Line Inputs (Channels 7/8–11/12):Connect line-level devices to these inputs with standard
stereo RCA cables.
8. Line Out: Use standard XLR cables to connect these outputs to your loudspeakers or
amplifier system. Use the Master Level knob to control the level of these outputs.
9. Mono Out: Use a standard 1/4” (6.35 mm) TS cable to connect this output to a remote
recording device, remote v
10. Mic Monitor: Use a standard 1/4” (6.35 mm) cable to connect this output to a powered
monitor, remote mixer, etc. When the Mic On/Off button is depressed (in the down position),
the signal from the mic/line inputs (Channels 1–6) will be sent to this output, and the Line
Outs will be disabled. When the Mic On/Off button is raised (in the up position), this output
will be disabled, and all channels will be sent to the Line Outs.
11. Rec Out: Use standard stereo RCA cables to connect these outputs to a remote recording
device, remote mixer, etc. Use the Master Level knob to control the level of these outputs.

5
Setup
Items not listed under Introduction >Box Contents are sold separately.
To set up Rack Mix 12 with your sound system:
1. If you are using any audio source with RCA outputs (Blu-ray®players, stereos, etc.), use
standard RCA cables to connect them to the line inputs on the rear panel. Your audio
sources must be line-level (no phono-level turntables).
2. If you are using microphones or other audio sources that send a line-level signal, connect
them to the mic/line inputs on the rear panel.
3. Use standard XLR or 1/4” (6.35 mm) TRS cables to connect the line outputs on the rear
panel to your loudspeakers, remote mixer, etc.
4. If you want to send the main mix to a remote recording device, remote mixer, etc., use a standard
1/4” (6.35 mm) TS cable to connect the Mono Out on the rear panel to it. Alternatively, use
standard stereo RCA cables to connect the Rec Outs on the rear panel to it.
5. Use the included power cable to connect Rack Mix 12 to a power outlet.
6. Power on all of your audio sources (Blu-ray players, stereos, microphones, etc.).
7. Power on Rack Mix 12.
Example
Loudspeakers
Blu-ray Player
(to input on
remote mixer)
Microphones
Power