SM Pro M-Patch 4M Bedienungsanleitung

M-Patch 4M

Manual

September 2012

SAFETY INSTRUCTIONS

CAUTION: To reduce the risk of electrical shock, do not remove the cover or rear

panel of this unit. No user serviceable parts inside. Please refer servicing to qualied

personnel only.

WARNING: To reduce the risk of re or electrical shock do not expose this appliance

to rain or moisture.

DETAILED SAFETY INSTRUCTIONS:

All safety and operation instructions of this manual should be read and adhered to

before operation.

Retain Instructions:

Please retain all safety and operating instructions for future reference.

Follow instructions:

All operation and user instructions should be followed.

Water, liquid and Moisture:

The appliance should not be used near water, rain or other liquids. Make sure that

no liquid can leak, spill or otherwise seep into the appliance.

Ventilation:

Please place the appliance so no obstacles interfere or impede the ow of air through

the ventilation openings.

Heat:

The appliance should be situated away from other heat sources such as heaters,

radiators, ovens, or other appliances that produce heat.

Power Source:

Make sure your appliance is set to the correct voltage for the country in which it will

be use before switching the device ON.

Grounding and Polarization:

Precautions should be taken so that the grounding or polarization means of an ap-

pliance is not defeated.

Power-Cord Protection:

Power supply cords should be routed so that they are not likely to be walked on,

pinched, damaged, worn, or rubbed by any other device or obstacle.

Cleaning:

The appliance should be cleaned only with a light soft cloth. Do not use any damag-

ing or corrosive products on the unit.

Periods of inactivity:

The power cord of the appliance should be unplugged from the outlet when left un-

used for a long period of time or in case a lightning storm occurs.

Damage Requiring Service:

The appliance should be serviced by qualied service personnel when:

• The power supply cord or the plug has been damaged; or

• Objects have fallen, or liquid has been spilled into the appliance; or

• The appliance has been exposed to rain; or

• The appliance does not appear to operate normally or exhibits a marked change

in performance; or

• The appliance has been dropped, or the enclosure damaged.

Servicing:

The user should not attempt to service the appliance beyond that is described in the

Operating Instructions.

All other servicing should be referred to qualied service personnel.

Foreward

Dear Customer, Thank you very much for expressing your condence in SM Pro

Audio products by purchasing this unit. The M-Patch 4M was designed to be a com-

prehensive studio monitor controller for home, project and professional studios,

sound equipment rental companies, repair centers, schools and xed installations—

in short, virtually any and all venues where audio products are used. Drawing on

years of hands-on experience in the audio industry and valuable suggestions from

our customers, our engineers have developed a product that we are certain will more

than meet your expectations. As with all SM Pro Audio equipment, the M-Patch 4M

was designed to provide you with superb performance, excellent technical specica-

tions, and uncompromising audio quality at an extremely affordable price.

Regards, SM Pro Audio

IMPORTANT: High output volumes may damage your ears, your monitors, and/or your

headphones. Turn down the LEVEL controls before you switch on the M-Patch 4M.

INSTALLATION

Your SM Pro Audio M-Patch 4M was carefully packed at the factory and the packag-

ing was designed to protect the unit from rough handling. Nevertheless, we recom-

mend that you carefully examine the packaging and its contents for any signs of

physical damage that may have occurred in transit.

If the unit is damaged, please do not return it to us, but notify your dealer and the

shipping company immediately, otherwise claims for damage or replacement may

not be granted. Shipping claims must be made by the consignee.

PLACEMENT

The SM Pro Audio M-Patch 4M utilizes an electronic circuit. Be sure that there is

enough air space around the unit for cooling. To avoid overheating, please do not

place the unit on high temperature devices, such as power ampliers, or near other

units, such as wireless devices, that may transmit high frequencies.

Mains voltage

The M-Patch 4M can be used with voltages ranging from 100V AC to 240V AC. Please

make sure that you have selected the correct voltage range on the back of the unit,

and that the required fuse setting is correct, before switching the unit ON. Any damage

occurring as a result of incorrect voltage selection may not be covered under warranty.

M-Patch 4m OVERVIEW

The M-Patch 4M is a multichannel passive analog attenuator designed to provide soni-

cally transparent level control over a variety of stereo audio signals. It allows you to con-

nect multiple input signals, route them to various destinations, and control their levels

via a series of rotary volume attenuators. The Master Attenuator utilizes discrete 0.5%

resisters with a switched mechanism—a design that offers superior accuracy over stand-

ard variable resistor designs, especially at critical low volume levels.

Multiple switches provide for mute, source selection, output assignment, and stereo/

mono operation. A built-in talkback microphone, which automatically ducks the Control

Room outputs -20dB when engaged, an on-board headphone ampli er, and con gu-

rable desktop or rackmount operation, make the M-Patch 4M an ideal centerpiece for

monitor control in home, professional, and project studio applications.

M-PAtch 4M Input Section

M-PATCH 4M Master Section

M-PATCH 4M Output Section

Balanced/Aux switch: Here you decide, if you want to hear

the balanced or unbalanced inputs in the control room.

Switch between Stereo or

Mono in the control room.

The Master Rotary Volume At-

tenuator adjusts the volume of

all signals in the control room.

„All Mute“ mutes all sig-

nals in the control room.

Here you choose which input sources (bal-

anced BL1/BL2 or unbalanced UB1/UB2) are

routed to the outputs “Studio 1” and “Studio 2”.

Here you decide, if the balanced

inputs 1 or 2 are outputted to the

control room outs 1 or 2.

Here you adjust the volume of the

balanced inputs which are outputted

at the control room outputs 1 and 2.

Here you adjust the volume of the un-

balanced inputs which are outputted

at the control room outputs 1 and 2.

Here you decide, if the unbalanced

inputs 1 or 2 are outputted to the

control room outs 1 or 2.

M-PatCH 4M REAR PANEL

Your M-Patch 4M is designed to accommodate a wide variety of balanced and unbal-

anced audio connections, allowing for a great deal of  exibility in adapting the unit for

use in almost any studio environment.

Inputs

• Dual L/R Combination Balanced XLR – 1/4” TRS

• Dual L/R Unbalanced RCA

• Dual 1/8” (3.5mm) TRS

• Balanced XLR Talkback Microphone (w/ Built-In Mic Preampli er)

• TS Talkback Microphone Remote Activator (w/ INT/EXT Selector Switch)

• TS Mute Function Remote Activator

Outputs

• Dual L/R Balanced XLR Control Room Out

• L/R XLR Balanced Studio Out

• L/R 1/4” Unbalanced TS Studio Out

• L/R Unbalanced RCA Studio Out

• 1/8” (3.5mm) TRS Studio Out

Mutes the control room

outputs 1 and/or 2.

Mic On: Switches the talk-

back microphone on or off.

Adjust the volume of the

talkback microphone.

Adjusts the volume of the

Studio 1/Studio 2 outputs.

Mutes the outputs of the

outputs Studio 1/Studio 2.

Here you choose what to hear via

the headphone out: Studio 1 or 2

or Control Room 1 or 2.

installation

The M-Patch 4M can sit comfortably on your desktop, with all controls within easy reach.

Alternately, the included rack ears can be used for situating the unit in a standard 19”

rackmount con guration.

Audio input Connections

The M-Patch 4M features four types of inputs, two of which are balanced and two of

which are unbalanced. The Balanced Inputs feature combination XLR – 1/4” TRS con-

nectors, while the AUX Inputs feature RCA and 1/8” TRS unbalanced connectors. All

inputs are located on the M-Patch 4M’s rear panel.

IMPORTANT!

The M-Patch 4M accepts mic or line level input signals only. Do not

connect your power ampli er outputs to the M-Patch 4M’s inputs—this will dam-

age the internal circuitry, and will NOT be covered under warranty.

Balanced Inputs

The main Balanced Inputs 1 and 2 are ideally suited for connecting to your

audio interface(s) and/or mixer. Simply connect the outputs of your interface

to the inputs of the M-Patch 4M, and use the rotary volume controls under

the Studio 1 and Studio 2 Input Selectors to attenuate the signals as needed.

(Note: Set the attenuators fully clockwise if no attenuation is necessary.)

AUX Inputs

The Aux input channels features two different connector types, ideally

suited for signals from unbalanced devices such as CD players (RCA)

and MP3 players or computer soundcards (1/8” TRS).

*NOTE: You can connect up to six different devices to the physical con-

nectors simultaneously. Use the front panel Studio 1 & 2 and Master Bal-

anced / Aux selector switches to choose the signal(s) you wish to monitor.

AUDIO output connections

Control Room Outputs

The M-Patch 4M has two sets of Control Room

(C/R) outputs, each of which will carry the input sig-

nals chosen by the front-panel Control Room 1 and

2 input selector switches. Use these outputs to route

input signals to your monitor speakers. The levels

appearing at the Control Room 1 & 2 outputs can be

attenuated using the front-panel Master rotary vol-

ume control. The C/R signal path is totally passive.

Studio Outputs

The M-Patch 4M has two sets of Studio outputs (balanced and unbalanced), each of

which will carry the input signals chosen by the front-panel Studio 1 and 2 input se-

lector switches. Use these outputs to route your input signals to headphone systems,

to monitoring systems in the recording room, or to any device at which you want the

talkback signal to appear.

Output selector switches

Each of the four outputs can be individu-

ally muted via their corresponding front-panel

MUTE switches. In addition, the Studio 1 and

Studio 2 output levels can be adjusted using the

Studio 1 and Studio 2 rotary volume controls.

These controls can also be used to balance the

volume of the Studio 1 and 2 signals with the

level of the talkback mic.

When talkback is engaged (MIC ON), all output signals are attenuated by -20dB, how-

ever the talkback mic signal only appears at the Studio 1 and 2 outputs.

TalkBACK MICROPHONE

The M-Patch 4M features a built-in talkback system. An internal

microphone is provided on the front panel, or you can plug your

own microphone into the balanced XLR microphone input on

the rear panel. The INT(ernal) / EXT(ernal) switch on the rear

panel determines which microphone is used for talkback.

Pushing the front-panel MIC ON switch engages talkback. It

can also be engaged via a switch plugged into the rear-panel

Mic Remote input.

Talkback level is controlled by the rotary MIC ON volume control. When talkback is

engaged, the signals appearing at the Control Room 1, Control Room 2, Studio 1,

and Studio 2 outputs are attenuated by -20dB. Note, however, that the talkback mic

signal only appears at the Studio 1 and 2 outputs.

Using the M-Patch 4m

You can use M-Patch 4M anywhere you want to trim the voltage of, i.e., reduce the

volume of analog audio signals. Other than its primary use as a professional moni-

toring controller, you could, for example, use the M-Patch 4M to trim the output

of a microphone preamplier. With its high-quality potentiometers and precision

lm-resistor master attenuator, the M-Patch 4M passes signal more accurately

and with far greater transparency than the built-in volume controls found on most

audio equipment.

You can use the MPatch 4M...

• To A/B between different audio sources

• As a switcher for multiple monitor systems

vOLUME vOLUME

MUTE MUTE

HeadphoneOUTPUT SELECTOR

100

vOLUME

M-PATCH 4M

100

C/RC/R

1212

Studio 2

Studio 1

C/R 1C/R 2

STUDIO

C/R1

Studio 1 Studio 2

Mic ON

1010 1000 0

MUTE MUTE

Mic ON

Mic

BL1 BL2

UB1

UB2

BL1 BL2

UB1

UB2

-0

BALANCED Aux

All MUTE

STEREO MONO

vOLUME

MUTE MUTE

HeadphoneOUTPUT SELECTOR

100

vOLUME

M-PATCH 4M

100

C/RC/R

1212

Studio 2

Studio 1

C/R 1C/R 2

STUDIO

C/R1

Studio 1 Studio 2

Mic ON

1010 1000 0

MUTE MUTE

Mic ON

Mic

BL1 BL2

UB1

UB2

BL1 BL2

UB1

UB2

BALANCED Aux

All MUTE

STEREO MONO

• To trim the output level of a digital-to-analog converter, such as those found in

high end pre-ampliers

• As a local volume control for distributed audio systems

• To monitor directly from the outputs of your computer sound card or audio in-

terfaces without using a mixer, and without degrading bit-resolution by reducing

volume within your DAW

Simple Ideas for Studio Use

Typically you would connect the output of your computer soundcard or audio inter-

face to the input of the M-Patch 4M via the RCA, TRS, or XLR jacks.

However, you can connect multiple devices as required. For example, your could

connect the outputs of your audio interface to the balanced XLR inputs, and your

soundcard’s mini-jack output to the stereo 3.5mm AUX input. At the same time you

could also connect your CD player or other line level device to the AUX RCA

inputs, and the output of a mixer to the second set of balanced inputs.

Connect XLR cables from the outputs of the M-Patch 4M directly to your active moni-

tors or the amplier that powers the monitors. Since you have multiple

outputs available simultaneously, you could easily route a second M-Patch 4M

output to a subwoofer. In this sceario, simply connect the C/R 1 outputs to your left

and right monitor speakers and the C/R 2 output output your subwoofer.

To avoid the bit-degradation that results from lowering the master volume output

of your computer DAW, connect the output of your computer audio interface to an

M-Patch 4M input, and an output of the M-Patch 4M to the input of your powered

studio monitors (or amplier driving passive monitors). Turn the volume of your moni-

tors up all the way, set your DAW and audio interface software volume control panel

to 0dB, and use the M-Patch 4M control your monitoring level.

The M-Patch 4M: Simple, effective, transparent!

SPECIFICATIONS

AUDIO INPUTS

Connectors 4 x Combination XLR – 1/4” TRS

2 x stereo RCA pair (L&R)

2 x stereo 3.5mm jack

AUDIO OUTPUTS

Output Connectors 3 x XLR L/R pairs

1 x RCA L/R pair

1 x 1/4” L/R pair

HEADPHONE OUTPUT

Output Connectors 1 x 14” TRS stereo

Frequency response 20Hz – 20Hz +/- 0.5dB

Maximum output level 320mW into 32Ù

POWER

External DC12-16V adaptor

PHYSICAL

Dimensions (no rack ears) 37cm x 15.5cm x 8.5 cm

Net weight approx. 5kg

Warranty

1. Warranty Card

To be protected by this warranty, the buyer must complete and return the enclosed

warranty card (signed/stamped by retail dealer) within 14 days of the date of

purchase to SM Pro Audio (see address below 3). Failure to return the card in due

time (date as per postmark) will void any extended warranty claims.

2. Warranty

2.1. SM Pro Audio warrants the mechanical and electronic components of this

product to be free of defects in material and workmanship for a period of one (3)

years from the original date of purchase, in accordance with the warranty regula-

tions described below. If any defects occur within the specied warranty period that

are not caused by normal wear or inappropriate use, SM Pro Audio shall, at its sole

discretion, either repair or replace the product.

2.2. If the warranty claim proves to be justied, the product will be returned freight

prepaid by SM Pro Audio within Australia. Outside of Australia, the product will be

returned at the buyer‘s expense.

2.3. Warranty claims other than those indicated above are expressly excluded.

3. Return Authorization Number

3.1. To obtain warranty service, the buyer must call SM Pro Audio during normal

business hours BEFORE returning the product (Tel.: +61 3 9555 8081). All inquir-

ies must be accompanied by a description of the problem. SM Pro Audio will then

issue a return authorization number or by email to [email protected]

3.2. The product must be returned in its original shipping carton, together with the

return authorization number, to the following address:

SM Pro Audio

Service Department

W25, 26-28 Roberna St

Moorabbin

Melbourne, Victoria

Australia 3189

4. Warranty Regulations

4.1. Warranty services will be furnished only if the product is accompanied by an

original retail dealer‘s invoice. Any product deemed eligible for repair or replace-

ment by SM Pro Audio under the terms of this warranty will be repaired or replaced

in the best possible manner.

4.2. If the product needs to be modied or adapted in order to comply with applica-

ble technical or safety standards on a national or local level, in any country which

is not the country for which the product was originally developed and manufac-

tured, this modication/adaptation shall not be considered a defect in materials or

workmanship.

The warranty does not cover any such modication/adaptation, irrespective of

whether it was carried out properly or not. Under the terms of this warranty, SM Pro

Audio shall not be held responsible for any cost resulting from such a modication/

adaptation.

4.3. Free inspections, maintenance/repair work and replacement of parts are

expressly excluded from this warranty, in particular if caused by inappropriate use.

Likewise, the warranty does not cover defects of expendable parts caused by

normal wear of the product. Expendable parts are typically pots, potentiometers,

switches and similar components.

4.4. Damages/defects caused by the following conditions are not covered by this

warranty:

• Misuse, neglect or failure to operate the unit in compliance with the instruc-

tions given in the user or service manuals.

• Connection or operation of the unit in any way that does not comply with the tech-

nical or safety regulations applicable in the country where the product is used.

• Damages/defects that are caused by any other condition beyond the control of

SM Pro Audio.

4.5. Any repair carried out by unauthorized personnel will void the warranty.

4.6. Products which do not meet the terms of this warranty will be repaired ex-

clusively at the buyer‘s expense. SM Pro Audio will inform the buyer of any such

circumstance. If the buyer fails to submit a written repair order within 4 weeks after

notication, SM Pro Audio will return the unit C.O.D. with a separate invoice for

freight and packing. Such cost will also be invoiced separately when the buyer has

sent in a written repair order.

5. Claim for Damages

Failure of SM Pro Audio to provide proper warranty service shall not entitle the

buyer to claim (consequential) damages. In no event shall the liability of SM Pro

Audio exceed the invoiced value of the product.

6. Other Warranty Rights

This warranty does not exclude or limit the buyer‘s statutory rights provided by

national law, in particular, any such rights against the seller that arise from a legally

effective purchase contract.

The information contained in this manual is subject to change without notice. No

part of this manual may be reproduced or transmitted in any form or by any means,

electronic or mechanical, including photocopying and recording of any kind, for any

purpose, without the express written permission of SM Pro Audio.

All illustrations, descriptions and technical specications are subject to change

without prior notice.

SM Pro Audio Service Department

W25, 26-28 Roberna St Moorabbin Melbourne, Victoria Australia 3189

www.smproaudio.com

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