Monoprice 16220 Manuel utilisateur

TABLE OF CONTENTS

SAFETY WARNINGS AND GUIDELINES.......................................................................................................................................3

INTRODUCTION................................................................................................................................................................................................4

FEATURES..............................................................................................................................................................................................................4

PACKAGE CONTENTS.................................................................................................................................................................................5

SPEAKER BREAK-IN ......................................................................................................................................................................................5

SPEAKER PLACEMENT ...............................................................................................................................................................................6

CONSTANT VOLTAGE VS 8-OHM SPEAKER SYSTEMS..................................................................................................6

SPEAKER WIRING ........................................................................................................................................................................................... 7

SPEAKER CONNECTIONS.........................................................................................................................................................................8

SUBWOOFER MOUNTING.....................................................................................................................................................................10

Horizontal Mounting ..........................................................................................................................................................................10

Vertical Mounting ..................................................................................................................................................................................11

SATELLITE SPEAKER MOUNTING.....................................................................................................................................................11

Horizontal ......................................................................................................................................................................................................11

Vertical .............................................................................................................................................................................................................11

WIRING THE SPEAKERS...........................................................................................................................................................................12

ONLINE SUPPORT.........................................................................................................................................................................................14

SPECIFICATIONS............................................................................................................................................................................................14

SAFETY WARNINGS AND GUIDELINES

Turn off and unplug all equipment prior to making electrical connections, including

speaker wire connections.

Reduce the volume level prior to making any change to the audio input source, e.g.,

changing radio stations or changing CDs.

This passive speaker system is rated IPX4, meaning that it is protected from

dripping or splashing water from any direction. However, it should not be installed

in an area where it is directly exposed to rain and other weather conditions. The

speakers should always be installed under a full cover.

The satellite speakers should be mounted with a 15° down angle to prevent water

accumulation.

The subwoofer should be mounted in the horizontal position to prevent water from

entering the terminal area.

Ensure that the subwoofer is installed in a location where it cannot fall on people or

animals if it becomes dislodged.

Ensure that the subwoofer terminal cover is properly secured with the wires exiting

from the bottom to of the cover with the rubber flap to maintain the IPX4

waterproof rating.

When using this speaker as part of a constant voltage speaker system, ensure that

the amplifier power is at least 20% higher than the total power settings of the

connected speakers.

Most speaker damage is caused by clipping, which is heard as distortion. If you hear

distortion, reduce the volume level until the audio is no longer distorted.

Take care to ensure that the speaker wire connections are properly polarized.

Inverted polarization can result in unnatural or attenuated sound, especially in the

bass frequencies.

Do not use chemical cleaners or solvents to clean this speaker. Use only a soft, dry

cloth. Moisten the cloth with warm water for particularly stubborn deposits.

INTRODUCTION

Thank you for purchasing this BGM 4.1 Indoor/Outdoor Speaker System! This passive

speaker system features a 6.5" subwoofer and two pairs of 2.5" stereo satellite speakers. It

can be used as a standard 8-ohm speaker system or as part of a 70-volt speaker system

with 30-watt and 60-watt taps. When properly installed, the speakers carry an IPX4

protection rating, which means that they are protected against dripping or splashing

water.

FEATURES

6.5" passive subwoofer

Two pairs of 2.5" stereo satellites

50 Hz ~ 20 kHz frequency response and 160 Hz crossover

Suitable for outdoor use with an IPX4 protection rating

Usable as an 8-ohm system or as part of a 70-volt system

120-watts maximum power handling capacity in 8-ohm mode

30-watt and 60-watt taps for 70-volt mode

Includes wall mounting brackets for the satellite speakers

Wall mounting option for the subwoofer

PACKAGE CONTENTS

Please take an inventory of the package contents to ensure you have all the items listed

below. If anything is missing or damaged, please contact Monoprice Customer Service for a

replacement.

1x 6.5" passive subwoofer speaker

4x 2.5" full range satellite speakers

4x Satellite speaker wall mount brackets

4x Rubber feet for the subwoofer

2x Keyhole brackets for the subwoofer

4x Screws for the keyhole brackets

1x Wall mounting template

SPEAKER BREAK-IN

In the same way that a new car requires a break-in period before it can be safely operated

at high engine RPMs, speakers require a break-in period before they can be safely operated

at maximum volume levels. Proper break-in ensures that the moving parts of the speaker

(the cone and cone suspension) are allowed to flex and soften, losing the initial stiffness

and allowing the speaker to move through its full intended range. After the break-in

period, the speakers will produce richer and fatter sounding lows, warmer and smoother

sounding mids, and cleaner and more accurate highs, without any hint of distortion.

The best way to break-in speakers is simply to play normal music or watch movies at

moderate volume levels. The amount of time required for speaker break-in varies based on

the operating environment, but is typically in the area of 50~80 hours. It will take a bit

longer in a cold or dry environment and a little less time in a warm or humid environment.

Note that the break-in period does not have to be continuous.

SPEAKER PLACEMENT

Before making any connections, you should examine the room and determine where you

will place each speaker. This system is intended for open spaces as large as 30 feet by 50

feet. If installing to a larger room, multiple systems should be used in a 70-volt speaker

array. Some basic "rules of thumb" for the proper placement of this speaker system are

outlined below.

The left and right channel satellite speakers should be placed in a staggered

manner, with a stereo pair along one wall and across the room on the opposite wall.

If the ceiling is at least 9 feet above the floor, the satellites should be installed

about 8 feet or more above the floor surface.

The subwoofer should be placed in a corner, which allows the adjacent walls to act

as a sound amplifier.

Ensure that the bass port is unobstructed.

CONSTANT VOLTAGE VS 8-OHM SPEAKER SYSTEMS

A constant voltage speaker system differs from a traditional 8-ohm speaker system in that

it uses a step-up transformer at the audio source to raise the voltage and lower the current

on the transmission line. At the speaker end, a step-down transformer converts the signal

back to a normal speaker level voltage. This reduces power loss during transmission, which

allows for the use of longer speaker wire runs using smaller gauge wire.

Additionally, a constant voltage speaker system allows for the use of multiple speakers on

each channel, without the need for complicated impedance calculations and

configurations. In a constant voltage system, all speakers on a given channel are connected

in parallel and the complicated impedance calculations are replaced by simple wattage

calculations.

For example, if you want to connect two speakers per channel in a traditional 8-ohm

speaker system, you must either connect them in series, which results in an overall 16-ohm

impedance, or in parallel, which results in an overall 4-ohm impedance. In the first case, the

16-ohms impedance effectively halves the output power of your amplifier, resulting in

lower overall volume levels. In the latter case, the 4-ohms impedance means that your

amplifier will have to work harder and must be rated as stable at 4 ohms. Adding a third

speaker to the mix would complicate it further, producing either a 24-ohm or 2.67-ohm

overall impedance. Note that very few amplifiers are stable under 2-ohm loads, so that is

usually not an option.

On the other hand, with a constant voltage system, you consider first the RMS output

wattage of the amplifier. This should be reduced by 20% to compensate for insertion loss.

For example, if using a 100-watt amplifier, the total load from speakers should not exceed

80 watts.

Each individual speaker on a given channel is set to a value such that the total does not

exceed the rated power, less 20%. You do not need to worry about making the total as

close as possible to the limit; just ensure that the total does not exceed the limit.

If all speakers are set to the same wattage value, they will all have the same volume level.

If one speaker is set to a higher wattage value, it will be louder than the others, while a

speaker set to a smaller value will be quieter than the others. This allows you to

compensate for the environment in which the speaker is placed. For example, a speaker

placed outside would need to be louder than a speaker placed in a small room.

SPEAKER WIRING

Most constant voltage speaker installations will consist of

multiple speakers per channel, with all speakers connected in

parallel, as shown in the diagram to the right.

To wire speakers in parallel, connect the first speaker to the

amplifier as normal. Connect the positive terminal on the first

speaker to the positive terminal of the second speaker, and

the negative terminal on the first speaker to the negative

terminal on the second. Repeat for each additional speaker in

the array.

SPEAKER CONNECTIONS

Warning! To prevent possible personal injury and/or damage to your equipment, turn off

and unplug all equipment before making connections!

Before attempting to make any connections it is best to look at the situation, get all the

necessary materials together, and then make all the connections at once.

First, look at the back of your amplifier or receiver to determine what options it offers for

making connections. Amplifiers and receivers typically employ either 5-way binding posts,

spring-loaded terminals, or push terminals for the speaker connections.

A 5-way binding post can accept bare speaker wire, spade terminals, pin plugs, and banana

plugs, while spring loaded and push terminals can accept either bare speaker wire or pin

plugs. Refer to the documentation that came with your amplifier or receiver to determine

the maximum size/gauge speaker wire the speaker terminals can accept.

At the subwoofer end, all connections are made using screw terminals. While you can

make a bare wire connection, it is highly recommended to use Cable Lugs or Spade

Terminals. This includes the terminals for connecting the speaker wire from the amplifier as

well as those for connecting to the satellite speakers. The screw terminals will accept #6 or

#8 terminals/lugs with 4mm inside space and 8mm outside width.

The satellite speakers use Spring Terminals, which can accept bare speaker wire up to

14AWG or pin plugs. Pin plugs are recommended both for their convenience and their

ability to connecter larger diameter speaker wire.

Regardless of how you choose to make the connection you will need some speaker wire.

The thickness, or gauge, of the wire needed depends primarily on the distance over which

the signal will be sent. The following table serves as a guideline for determining the

minimum wire gauge to use in a standard 8-ohm installation:

Wire Gauge

Distance (feet)

18 AWG

16 AWG

14 AWG

12 AWG

10 AWG

100

In general you should use the heaviest gauge speaker wire that will fit in the connectors

(remember, the smaller the AWG number, the heavier/thicker the wire). Using pin plugs,

spade terminals, and cable lugs can allow use of heavier gauge wire.

Rather than using fixed length speaker wires, it is best to get a roll and cut the wires to the

length you will need them. This ensures that there is a minimum amount of excess wire.

However, even if your amplifier is off-center, the lengths of wire used for each speaker pair

(front mains or surrounds) should be identical. This keeps the impedance on each channel

the same, which ensures that the volume levels, frequency ranges, and tonalities are

identical. Any excess wire should be snaked back and forth, but not coiled, to avoid

creating an inductor/antenna for stray radio signals.

Before making the actual connections, cut each length of wire to size. Note the markings

on the wire that differentiate between each conductor. Sometimes the marking clearly

identifies a positive and negative side. Some common clearly positive and negative

markings or identifiers are:

Positive

Negative

Red

Black

Copper

Silver

+ + +

- - -

In many cases, the mark is a single stripe on the jacket of one of the connectors. In this

case the side with the stripe is generally considered the positive side, but it really does not

matter as long as you are consistent in always using the stripe as positive or always using it

as negative.

If you use pin plugs and spade terminals/cable lugs (highly recommended), install the plugs

on the wire, taking care to match the polarity of the plug (if applicable) with the polarity of

the wire. Once you have constructed each wire assembly, double check each end to ensure

the polarity matches that of the other end on the same strand.

Tip: Use a continuity tester, such as a digital multimeter, to verify that the

polarity matches at each end.

If you will be using bare wire for any of the connections, strip about 3/8" insulation from

the wire end and twist it to prevent stray strands.

SUBWOOFER MOUNTING

The subwoofer can be either placed on a horizontal surface or mounted to a vertical

surface. If mounting to a vertical surface, you will need two screws with screw heads with

a 5-7mm head diameter (not included).

Horizontal Mounting

1. Peel the protective film from the back of one of the included rubber feet, then

place it on one of the corners on the bottom of the subwoofer. Repeat for the other

three rubber feet and corners.

2. Place the subwoofer on the horizontal surface at the desired location. If placing it

above the floor, ensure that it is not in a position where it could fall on people or

animals in the event that it becomes dislodged or knocked off its surface.

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