Rack Mix 12 - Audio Mixer MARANTZ - Free user manual and instructions

Product Type	Audio mixing table
Brand	Marantz
Model	Rack Mix 12
Number of channels	12 (6 combo mic/line inputs + 6 RCA line inputs)
Format	1U rack mount (ultra-slim)
Power supply	AC mains (cable supplied) or 24 V DC
Fuse	Compartment for appropriate rated fuse
Mic/line inputs	6 combo XLR / 6.35 mm inputs (channels 1-6) with MIC/PH/LINE selector
Additional line inputs	6 stereo RCA inputs (channels 7/8 – 11/12)
Main outputs	Balanced XLR line outputs
Mono output	1 TS 6.35 mm output (combined mono signal)
Recording outputs	1 pair of stereo RCA outputs
Mic monitoring output	1 TS 6.35 mm output (activated by Mic On/Off switch)
Equalizer	3-band (Low, Mid, High) on master mix
Phantom power	+18 to +21 V, selectable per channel (channels 1-6)
Priority function	Adjustable for channel 1 (attenuation or muting of other channels)
Indicators	SIG (optimal signal) LEDs and VU meters with clipping (CLIP)
Controls	Per-channel volume, mono output volume, master volume
Supplied accessories	Mounting bracket, 6 screws, power cable, user guide
Maintenance and cleaning	Clean with a dry cloth; do not use liquid products
Safety	Follow the manual's instructions; use a fuse of the same rating
Repairability	Contact an authorized service center; no user-serviceable parts

Frequently Asked Questions - Rack Mix 12 MARANTZ

How to connect a microphone to the Rack Mix 12?

Use a combo XLR input from channels 1 to 6. Select MIC or PH (phantom power) position according to your microphone. Adjust the level with the corresponding knob.

How to use phantom power?

For condenser microphones, set the input selector to PH (phantom). The power supplies +18 to +21 V. Do not use with dynamic microphones that do not need it.

How to configure the priority function of channel 1?

Use the Mic 1 Priority switch on the rear panel. Turned down, channel 1 mutes other inputs; turned up, it has no effect on other channels.

How to connect the Rack Mix 12 to powered speakers?

Connect the XLR line outputs (rear panel) to the speaker inputs using XLR cables. The master volume controls the level of these outputs.

How to record the master mix?

Use the RCA recording outputs (stereo) or the mono 6.35 mm output. Connect them to your recording device. The master volume controls the level of the recording outputs.

How to use the mic monitoring output?

Connect a headset or powered speaker to the mic monitoring output (6.35 mm). Press the Mic On/Off switch to activate the output; in ON mode, the line outputs are disabled and only the microphone signals (channels 1-6) are sent.

What to do if the CLIP LED stays on?

Reduce the master volume or the levels of the affected channels. The CLIP LED may flash occasionally, but if it stays on, the signal is too loud and may cause distortion.

How to adjust the equalizer?

Use the LOW, MID and HIGH knobs on the front panel to boost or cut the bass, midrange and treble of the master mix. Adjust according to your preferences.

Can I power the Rack Mix 12 with 24 V DC?

Yes, the DC power input (terminal block) accepts a standard 24 V supply. If both power supplies (AC and DC) are connected, priority is given to the AC supply.

How to replace the fuse?

Use a screwdriver to open the fuse compartment on the rear panel. Replace the fuse with a model of the same rating. Using an inappropriate fuse may damage the device.

USER MANUAL Rack Mix 12 MARANTZ

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.

Features

Front Panel

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.

Rear Panel

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.

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

Assistance technique

Technical Specifications

Input Channels	Mic/Line Inputs (Channels 1-6)
	Microphone Input	XLR+1/4" (6.35 mm) combination, electronically balanced, discrete input configuration
	Frequency Response	20 Hz - 22 kHz (±2 dBu)
	THD+N	≤0.03% @ 1 kHz
	Sensitivity	-40 dBu
	Maximum Input	-19 dBu
	Maximum Voltage Gain	60 dB (Mic Input ➔ Line Out, Mic Out & Mono Out)50 dB (Mic Input ➔ Rec Out)
	Signal-to-Noise Ratio	≥103 dB
	Phantom Power	+18-21 V, switch control
	Line Inputs (Channels 1-6)
	Line Input	XLR+1/4" (6.35 mm) combination, electronically balanced
	Frequency Response	20 Hz - 22 kHz (±2 dBu)
	THD+N	≤0.03% @ 1 kHz
	Sensitivity	0 dBu
	Maximum Input	+21 dBu
	Maximum Voltage Gain	20 dB (Mic Input ➔ Line Out, Mic Out & Mono Out)10 dB (Mic Input ➔ Rec Out)
	Signal-to-Noise Ratio	≥103 dB
	Line Inputs (Channels 7/8-11/12)
	Line Input	Stereo RCA pairs, electronically balanced
	Frequency Response	20 Hz - 22 kHz (±2 dBu)
	THD+N	≤0.03% @ 1 kHz
	Sensitivity	+10 dBu
	Maximum Input	+21 dBu
	Maximum Voltage Gain	10 dB (Line Input ➔ Line Out)0 dB (Line Input ➔ Rec Out)4 dB (Line Input ➔ Mono Out)
	Signal-to-Noise Ratio	≥103 dB
Impedance	Mic/Line Input	1.4 kΩ
	Line Input	≥ 10 kΩ
	All Outputs	120 Ω
Equalizer	High	±15 dB @ 12 kHz
	Mid	±12 dB @ 2.5 kHz
	Low	±15 dB @ 80 Hz
Crosstalk	Adjacent	Inputs dB @ 1 kHz (Channels 1-6)≤ -68 dB @ 1 kHz (Channels 7/8-11/12)
	Input → Output	≤ -82 dB @ 1 kHz (channel level @ max., EQ @ unity, master level & others @ min., input selectors set to Line)
Main Mix Line Output		0 dBu (+2 dBu), balanced (channel level, master level & EQ @ unity, all others at min., input selectors set to Line)
		0 dBu (+2 dBu), unbalanced (channel level, master level & EQ @ unity, all others at min., input selectors set to Line)
		+21 dBu balanced/unbalanced, 1/4" (6.35 mm) jacks
		Noise (Bus) < -83 dB @ 20 Hz – 22 kHz (channel level, master level & EQ @ unity, all others at min., input selectors set to Line)
Power	Connection: IECInput Voltage: 100V~, 110-120V~, 50/60Hz; 220-240V~, 50/60Hz or DC24V
Dimensions(width x depth x height)	19.0" x 7.7" x 1.7 "483 x 195 x 44 mm
Weight	6.4 lbs.2.9 kg

Specifications are subject to change without notice.

Trademarks & Licenses

Marantz is a trademark of D&M Holdings Inc., registered in the U.S. and other countries.

Blu-ray™ and the logo are trademarks of the Blu-ray Disc Association.

All other product names, company names, trademarks, or trade names are those of their respective owners.

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