Bogen VMIX Guida

Power Vector Mixer

Model VMIX

Installation and Use Manual

Specifications subject to change without notice.

54-2134-01C 1204

Notice

Every effort was made to ensure that the information in this

guide was complete and accurate at the time of printing.

However, information is subject to change.

Important Safety Information

WARNING: To Reduce The Risk of Fire Or Electric Shock, Do

Not Expose This Apparatus To Rain Or Moisture.

Always follow these basic safety precautions when installing and

using the unit:

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water. The apparatus shall

not be exposed to dripping or splashing and no objects filled

with liquids, such as vases, shall be placed on the apparatus.

6. Clean only with dry cloth.

7. DO NOT block any ventilation openings. Install in

accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat

registers, stoves, or other apparatus (including amplifiers)

that produce heat.

9. Do not defeat the safety purpose of the polarized or

grounding-type plug. A polarized plug has two blades with

one wider than the other. A grounding-type plug has two

blades and a third grounding prong.The wide blade, or the

third prong, are provided for your safety. If the provided plug

does not fit into your outlet, consult an electrician for

replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched,

particularly at plugs, convenience receptacles, and the point

where they exit from the apparatus.

11. Only use attachments/accessories specified by the

manufacturer.

12. Unplug this apparatus during lightning storms or when

unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is

required when the apparatus has been damaged in any way,

such as power supply cord or plug is damaged, liquid has

been spilled or objects have fallen into the apparatus, the

apparatus has been exposed to rain or moisture, does not

operate normally, or has been dropped.

IMPORTANT

CAUTION: TO PREVENT THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE COVER

(OR BACK). NO USER-SERVICEABLE PARTS

INSIDE. REFER SERVICING TO QUALIFIED

PERSONNEL.

The lightning flash with arrowhead

symbol, within an equilateral triangle, is

intended to alert the user to the

presence of uninsulated “dangerous voltage”

within the product’s enclosure that may be

of sufficient magnitude to constitute a risk

of electric shock to persons.

The exclamation point within an

equilateral triangle is intended to alert the

user to the presence of important operating

and maintenance (servicing) instructions in

the literature accompanying the appliance.

Contents

Page(s)

PANEL DESCRIPTIONS..................................................................................................2-3

VMIX Front Panel ........................................................................................................................................2

VMIX Rear Panel..........................................................................................................................................3

INSTALLATION ..................................................................................................................4

Package Contents ........................................................................................................................................4

Mounting ........................................................................................................................................................4

Rack Mounting ......................................................................................................................................4

Shelf/Table Mounting ............................................................................................................................4

Module Installation ......................................................................................................................................4

MODULES ............................................................................................................................5

Output Modules ..........................................................................................................................................5

Functionality ............................................................................................................................................5

Input Modules ..............................................................................................................................................5

Functionality ............................................................................................................................................5

Priorities ..................................................................................................................................................5

CONNECTIONS ..............................................................................................................6-7

Unbalanced Output ....................................................................................................................................6

Balanced Output ..........................................................................................................................................6

Remote Volume Control ............................................................................................................................6

Bridging ..........................................................................................................................................................6

Mute Control ................................................................................................................................................7

System Expansion of Power Vector Mixers ..........................................................................................7

OPERATION ....................................................................................................................8-9

Front Panel Controls & Indicators ..........................................................................................................8

Input Volume Controls and Signal / Clip Indicator ..............................................................................8

Bass and Treble Controls........................................................................................................................8

Master Volume Control ..........................................................................................................................8

Average/Peak Switch & LED Output Meter ......................................................................................8

Power Switch / Power Indicator ............................................................................................................8

Rear Panel Controls....................................................................................................................................9

Balanced Out Switch..............................................................................................................................9

Other Controls ............................................................................................................................................9

Tone Control Bypass Switch ..................................................................................................................9

Low-Cut Switch ......................................................................................................................................9

BLOCK DIAGRAM ............................................................................................................10

SPECIFICATIONS ............................................................................................................11

ACCESSORIES ..................................................................................................................12

LIMITED WARRANTY......................................................................................................13

Panel Descriptions

VMIX Front Panel

1. Input Volume Controls

Each of the 8 inputs is controlled by an independent volume control.

2. Signal / Clip Indicators

A single two-color LED located above each channel’s volume control indicates the audio activity of that

channel’s input. Green indicates signal present at the input; red indicates clipping of the input signal.

3.Treble Control

Controls the amount of cut or boost of treble frequencies above 10 kHz.

4. LED Output Meter

An 11-segment LED output level meter monitors the output level of the mixer.

5. Master Volume Control

Controls overall level of mixed input signals.

6. Power Indicator

An LED indicates AC power status.

7. Bass Control

Controls the amount of cut or boost of bass frequencies below 100 Hz.

8.Average/Peak Switch

This switch determines whether the LED Output Meter registers the average or peak level of the mixer’s output.

9. Power Switch

Controls AC power to the mixer.

Panel Descriptions

VMIX Rear Panel

1.AC Receptacle

A grounded, unswitched AC convenience receptacle with a 500W maximum capacity is provided for external

equipment.

2. Unbalanced Output Jack

Provides an unbalanced output for connection to an auxiliary or high-impedance input.

3. Bridging Jack

An RCA connector that allows the bridging of Power Vector products together for system expansion.

4. Remote Volume Control Terminals

Three terminals are provided for connection to a Bogen Model RVCP, Remote Volume Control Panel, to

control the mixer’s motorized Master Volume Control.

5. Low-Cut Switch

A slide switch (located in module bay 6) that allows roll off of frequencies below 125 Hz.

6.Tone Control Bypass Switch

A slide switch (located in module bay 6) that allows the effects of the bass and treble controls to be bypassed.

7.AC Line Cord and Circuit Breaker

A grounded, 3-wire AC line cord provides power to the mixer and is protected by a resettable circuit breaker.

8. Balanced Out Level Switch

Three-position slide switch that selects the signal level of the balanced output.

9. Balanced Out Terminals

Provides a balanced transformer-isolated output with selectable output levels.

10. Mute Control Terminals

Provides access to mute buses for external control and system expansion.

11. Module Bays

The mixer has eight module bays, all of which can accommodate input modules, with two bays (bays 7

and 8) that can accommodate either input or output modules.

Installation

Package Contents

• Power Vector Mixer • Module Covers (8)

• Instruction Manual • 12 mm Module Cover Screws (16)

Mounting

Rack Mounting

When stacking equipment in a rack, the mixer should either be on the bottom of the stack or above

equipment that does not produce heat. A rack mount bracket kit (model RPK87) is available for the Power

Vector mixer.

Shelf/Table Mounting

When using a shelf or table mount, the mixer should stand alone with no equipment on top of it or below it.

If the mixer must be stacked with other equipment, care must be taken to ensure that all the minimum clear-

ance distances are met and that the equipment below the mixer produces little significant heat. Rubber feet are

installed on the mixer to allow it to be placed on a tabletop.

Module Installation

Eight module bays are available to accept Bogen’s new advanced input modules. Module bays 7 & 8 can also

accommodate Bogen’s new advanced output modules, thereby allowing users to customize the mixer to suit

the needs of the installation. (The bays will not accept Bogen’s older style plug-in modules.)

Before installing a module, read the instructions included with the module and make the desired jumper setting

changes.

The modules are installed by simply sliding them along the card guides inside the module bays until the

faceplate firmly sits against the chassis, then use the two screws supplied with the module to secure it to the

chassis.

• Modules should slide in easily.

• Output modules will not fit in bays 1-6.

• Output modules can only be installed in bays 7 & 8.

• Output modules have 8 contacts on each side.

• Input modules have 6 contacts on each side.

• Older D-Series style Bogen input modules

(41/2" in length) are not usable.

- CAUTION -

DO NOT FORCE MODULES

Modules

Output Modules

Functionality

The PowerVector mixer accepts Bogen signal-processing output modules, which offer a cost effective and con-

venient way to add specific signal-processing capability into a system.When an output module is installed, the

mix bus signal is automatically rerouted through the output module, whose capabilities further process the sig-

nal before it is presented to the power mixer section.

Up to 2 output modules can be installed in a Power Vector mixer using module bays 7 & 8 (these bays accept

either output or input modules). When two output modules are installed, their signal-processing effects are

cascaded.The mix bus signal will first pass through the output module in module bay 7 and then through the

output module in bay 8. In some instances, the order in which the signal processing is applied is important and

can be determined by the module installation order.

Output modules automatically insert themselves into the signal path between the mix bus and the mixer out-

put, so no further connections are required beyond simply inserting the modules. Most Bogen output

modules include an unbalanced, Hi-Z input. This input feeds directly to the mixer’s mix bus through the front

level control for the particular module bay and is not processed by the output module directly. The input is

included so that the input function of the module bay is not lost when an output module is installed.

Input Modules

Functionality

The Power Vector mixer accepts Bogen’s new advanced input modules, which provide a wide range of input

types allowing the mixer inputs to be custom configured in both type and number for a particular application.

Input modules can be installed into any of the 8 module bays and do not have to be installed in any particular

bay order.The front panel volume control for that number bay will control the mix level of that input module.

In addition to a host of module specific features, each input module has a priority jumper section for creating

a priority hierarchy between different modules installed in the mixer.

Priorities

The Power Vector mixer allows inputs to be prioritized at four different levels.The Bogen input modules con-

tain circuitry that can cause their outputs to be muted in response to higher priority control

signals from other input modules. Each input module also contains circuitry that sends a mute control signal

out to other modules when it becomes active (all input modules become “active” when they receive an audio

input). Active modules may be prevented from sending their audio onto the mix bus by a higher priority

module that is also active.

Input priorities are set through a simple jumper field on the module. It is also possible not to assign a priority

level to an input module. By doing so, that module will never be muted by another input module in the

mixer.

Connections

Unbalanced Output

The VMIX includes an unbalanced output for connection to an auxiliary

or high-impedance input using an RCA connector. Output level is 0 dBµ

when meter reads “0”. Maximum output is +20 dBµ.

Balanced Output

Three terminals are provided for the transformer balanced output of the

Power Vector mixer.

Note:The output signal level is selectable for +4 dBµ, -10 dBµ, or -50 dBµ

(see Page 9).

Remote Volume Control

Three terminals are provided for remote control of the Master Volume

control on the front panel.This control is motorized, allowing full con-

trol over the setting of the master volume. Shorting the UP terminal

with the C terminal will rotate the MasterVolume control in a clockwise

direction, increasing the volume level. Shorting the DN terminal to the

C terminal will cause the Master Volume control to rotate in a counter-

clockwise direction and decrease the level of the MasterVolume control.

The impedance of the shorting connections must be less than 100 ohms

in order to operate the control. The Bogen Remote Volume Control

Panel (Model RVCP) provides a simple and elegant means of remote

control. Alternatively, a SPDT spring-loaded, center off switch or two

SPST push-button switches can provide the necessary contacts for

remote control.

Bridging

This connector makes the Power Vector’s mix bus available externally

and allows the connecting of PowerVector products for system expansion

and simple room combining.

This function is bi-directional. Any signal received will be amplified and

any signal sent can be used by another Power Vector product.The signal

levels at the bridging jack will drop by one-half with two Power Vectors

tied together and by two-thirds with three units tied together. Because

of the attenuation of the bridging signal, due to the signal loading of

other Power Vectors, it is not recommended that more than three units

be connected together. See Mute Control section and the illustration on

next page for additional information.

Connections

Mute Control

Each priority bus (High, Medium, and Low) can be externally activated.

This allows priority buses of two or more PowerVector products to be

linked together for system expansion purposes. A particular mute priority

can be externally forced by shorting that priority's bus terminal to the

C terminal of the Mute Control (the C terminal is the system ground).

Forcing the H priority bus this way will mute all modules except for

modules set for priority level 1(highest priority). Forcing the M priority

bus will mute modules set for priority levels 3 or 4, but not levels 1or

2, and forcing the L priority bus will only mute modules set at

priority level 4.

System Expansion of Power Vector Products

By interconnecting the Bridging Connector and Mute Control lines, it is possible to connect two or more

Power Vector units into a larger integrated system.Wire the bridging jack and mute control lines as shown in

the diagrams for bridging either 2 or 3 units together.The overall system gain of Power Vector products dimin-

ishes when they are bridged because each unit’s mix bus loads down the other product’s bus. When bridging

two Power Vector products, the system gain drops by about 6 dB.When bridging 3 Power Vector units together,

the system gain drops by approximately 12 dB. It is important to make sure that the input module or that the

input signal source itself has enough level to make up for the bridging loss otherwise the products may not be

able to reach their full rated output.

Power Vector Unit #1

Power Vector Unit #2

Power Vector Unit #3

Note: Bridging can be any combination of

Power Vector Mixers and/or Amplifiers.

Bridging more than 3 Power Vector units

together is not recommended because

of bridging losses.

Operation

Front Panel Controls & Indicators

Input Volume Controls and Signal / Clip Indicator

Each input module may be individually controlled by its corresponding

volume control knob.A single LED located above each channel’s volume

control indicates the audio activity of that channel’s input. Green indi-

cates signal present at the input. Red indicates that the input signal com-

ing from the input module into the mixer is clipping and distorted.This

is caused by either an input signal that is too high or an input module

volume control (gain) that is set too high.

Bass and Treble Controls

The treble control has a cut/boost range of +/- 10 dB at frequencies

above 10 kHz and provides a roll off after 20 kHz to reduce gain above

the audio range.The bass control has a cut/boost range of +/- 10 dB at

frequencies below 100 Hz.

Master Volume Control

The overall volume level of the mixer is set by a Master Volume control.

The Master Volume control is motorized and can be controlled by man-

ually adjusting the knob or by a remotely-mounted control

station. Connections and requirements for the remote control station

are described in the Connections section, under Remote Volume Control.

Average/Peak Switch & LED Output Meter

The LED Output Meter is an 11-segment meter that registers either the

average or the peak level of the mixer’s output signal.The meter can be

set to read either the average output signal (button in) or the peak

ouput signal levels (button out) by using the Avg/Peak button at the

bottom of the meter.

Power Switch / Power Indicator

The AC power to the amplifier is controlled by the Power rocker switch.

A red LED indicator lights to confirm the power on status of the mixer.

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