Extron electronic MPA 401-70V, MPA 401-100V User Manual

MPA 401-70V and MPA 401-100V • Setup Guide

Extron

LR

Slee

Slee

Tip (+)

Tip (L)

OUTPUT

This guide provides basic instructions for an experienced installer to install and congure the
Extron MPA 401-70V and MPA 401-100V mini power ampliers.

SI 3CT LP

Full-Range

Extron
MPA 401

Mini Power
Amplier

MPA 401-70V

MPA 401-100V

CLASS 2 WIRING

100V OUTPUT

OUTPUT

DO NOT GROUND

OR SHORT

US

®

SPEAKER OUTPUTS!

REMOTE

10V 50mA

LISTED

VOL/MUTE

10V 50mA

17TT

70V

AUDIO/VIDEO
APPARATUS

INPUTS

CLASS 2 WIRING

R

(SUMMED)

G

L

(MONO)

C

V

REMOTE

R

L

L

(SUMMED)

(MONO)

L

POWER

POWER

INPUTS

R

R

12V

12V

1.5A MAX

1.5A MAX

Extron
DVS 304 DVI AD

Digital Video
Scaler
with Audio

AUDIO

L

R

3

L

INPUTS

2

L R

R

1

100-240V .3A

L

50/60 Hz

Audio

Ceiling Speakers

RGB/R-Y,Y,B-Y/YC/VID

R-Y
/C

Y

4

/VID

SDI

DVI-I

YC

I

I

3

B-Y

N

N

P

P

2

U

VID

U

T

T

1

R

OUTPUT

L

R

4

O

O

B

U

U

/B-Y

T

T

G

P

P

/Y

U

U

T

R

T

/R-Y

V

H/
HV

VOLUME

VC 50

Extron

RS-232

LAN

RESET

LINK

ACT

Extron VC 50

Volume Controller

Extron

1

2

DISPLAY

MLC 104 IP Plus

OFF

3

ON

4

VOLUME

Controller

CONFIG

MLC 104 IP

Flat Panel
Display
(DVI)

DBS RECEIVER

VCR
(Video)

DVD
(Component)

DSS Receiver
(S-video)

Laptop
(RGB)

Step 1 — Turn all of the equipment off and disconnect all power sources.

Step 2 — Mount the amplier in either a plenum space, on a rack, under a desk, or on a projector.

ATTENTION: Although the amplier is plenum rated, the power supply provided with it is not. The power supply must not be

placed in the plenum space. Cables to and from the amplier must be plenum rated.

NOTE: Use only the two round mounting holes for mounting the MPA 401. The other four (hexagonal) holes anchor stand-offs

for the internal circuit boards. Using them may damage the amplier and does not provide secure mounting for the unit.

Step 3 — Attach the speakers to the MPA 401 using the 2-pole, 5 mm screw-lock
captive screw speaker receptacle on the rear panel. (The old and new silk screens for the
MPA401-100V are shown to the right).

ATTENTION: Do not ground or short the speaker outputs as this will damage the

amplier.

100V OUTPUT

100V

CLASS 2 WIRING

NOTE: The mono audio speaker receptacle may be labeled in one of two ways (see

the images to the right). The wiring and function are the same whichever way the
product is labeled.

Step 4 — Attach sources to the MPA 401 unit from the audio source or projector.

Ring (R)

The three rear panel audio inputs can be used individually or together:

z One pair of RCA receptacles (unbalanced)

z One 3.5 mm stereo tip-ring-sleeve receptacle (unbalanced)

z One 3.5 mm, 5-pole captive screw receptacle (balanced or unbalanced)

Sleeve ( )

RCA Connector

Sleeve ( )

3.5 mm TRS Connector

Tip

Tip

ve

ve

LR

Unbalanced Stereo Input

Tip

Ring

Sleeves

Tip

Ring

Balanced Stereo Input

LR

Sleeve

Tip

Unbalanced Mono Input

LR

Sleeve

Tip

Ring

Balanced Mono Input

1

MPA 401-70V and MPA 401-100V • Setup Guide (Cont’d)

BASSLEVEL TREBLE

r

NOTES:

• The input receptacle may be labeled in one of two ways: the ground pins of the input

connector port may be labeled or (see the images to the right). The wiring and
function are the same whichever way the product is labeled

• The MPA 401 amplifier sums the left and right signals from both the TRS and RCA

inputs to form Sum 1. Sum 1 is then weighted. At the same time, the amplifier sums
the left and right signals from the captive screw input to form Sum 2. Sum 1 and Sum 2
are then summed together to form a single mono signal. See figure 6 on page 9 of the
MPA401 Series User Guide for more details.

• The captive screw, RCA and TRS inputs are buffered.

L

(SUMMED)

R

INPUTS

L (MONO)

INPUTS

(SUMMED)

L

R

Ensure that the audio output of the projector is set to variable out. Multiple input options can be

R

used simultaneously and result in summing.

Step 5 — Connect power cords to the MPA 401 and other audio
equipment. The MPA401 ships with an Extron 36W desktop power
supply.

MPA 401 series

Amplifier

Power Receptacle

36 W Power Supply

AC Power Cord

Connect the pre-wired captive screw connector into one of the two pole,

3.5 mm captive screw outlets on the power supply and the other end into
the power receptacle on the amplier (see the gure to the right). The

12V

1.5A MAX

power cord connectors are correctly wired when shipped.

ATTENTION:

• See the attention notices in the Power Input section of the

MPA401 Series User Guide for important information about using

DC Power Cord
Captive Screw Connector

Tie

Wrap

power supplies.

• When the 36 W power supply is connected to the MPA 401, it

must not be shared with any other devices.

Step 6 — Adjust the MPA 401 input level, bass, and treble from the front panel (see gure at right).

1. If necessary, unplug the remote connector from the unit (see step 7, below).

2. If connecting the amplier to a system with adjustable volume, set the volume to its lowest

point. Then adjust the MPA401 front panel level potentiometer fully counterclockwise.

3. Set the system volume to its maximum volume level (no sound should come out).

4. Return to the MPA 401 and raise the level until sound distortion rst occurs, then lower slightly until the distortion disappears.

This setting ensures that, whatever the system volume setting may be, no clipping occurs.

5. Adjust bass and treble to preference.

Step 7 — The rear panel 3-pole Remote captive screw receptacle on the amplier can be
used for remote control of the volume by an Extron volume controller such as an Extron

REMOTE

10V 50mA

VCM100 AAP, VC 50, or MLA VC10 Plus. A MediaLink controller can also adjust the audio
volume via a network connection or by IR remote (see the MPA 401 Series User Guide).

MINI POWER AMPLIFIER

R

L (MONO)

DC Powe
Outputs

Captive Screw
Connector

Power Supply

Output Cord

MPA 401

10V 50mA

VOL/MUTE

NOTE: Control signal ground pins may be labeled as or “G.” The wiring and function

are the same, whichever way the product is labeled.

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VCG

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REMOTE

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68-1436-50
Rev C 05 13

2