Tascam Presentation Mixer/amplifier AV-452 Applications Guide

							10/10/03
Page 1 of 4AV-452 Applications Guide
˘ Four phantom-powered 
microphone inputs on 
XLRs and barrier strip
˘  Three-band EQ, level, 
gain and mute controls 
for each of the four micro-
phone inputs and the A/V 
buss. 
˘  Selectable 100Hz rolloff 
on microphone inputs
˘  Audio I/O for Cassette, 
CD-RW, DVD, VCR and Aux
˘  Composite and S-Video 
I/O for DVD, VCR and Aux
˘  RGB In/Thru port for con-
nection convenience
˘  Switchable Cascade input 
allows multiple rooms to 
be linked together 
˘  Stereo digital amplifi er 
delivers 100W/side at 8 
ohms
˘  Learning IR blaster with 
universal remote sends 
infrared commands to 
projectors and other 
devices when inputs are 
selected
˘  Record monitor selection 
allows dubbing between 
A/V devices
˘  Motorized master volume 
control
AV-452 Presentation Mixer/Amplifi er
Designed for the special needs 
of meeting rooms, conference halls, 
churches and other presentation ap-
plications, the TASCAM AV-452 is an 
all-new mixer created for the needs 
of the contracting and installation 
market. The AV-452 incorporates a 
microphone mixer, audio/video re-
ceiver, infrared controller and digital 
amplifi  er into one affordable, easy-
to-use component. 
As presentation systems and 
software have become more popular, bing. As devices are selected on the 
AV -452, IR commands can automatically 
be forwarded to the video projector, so 
the presenter only needs to press one 
switch to change sources. 
The built-in 100W digital power amp 
has two switchable speaker outputs, fa-
cilitating installations in multi-room 
setups. The AV-452 can also be cascaded 
for even more control over multi-room 
installations. 
Professional installers will appre-
ciate features that make the AV-452 
easy to specify and install. A 
constant voltage 
input with noise 
gate allows a pag-
ing system to co-
exist on the same 
speaker system 
as the AV-452. An 
EMG break can mute 
local audio when an emergency alarm 
system is activated, allowing the 
AV -452 to integrate with common 
building communication systems. 
 The AV-452 offers a list of conve-
nience features for the presenter, from 
a VGA In/Thru port for laptop connec-
tions to a learning IR remote. For even 
more  control, the installer can connect 
relay switches to a parallel port, or con-
nect an AMX™ or Crestron™ system to 
its’ RS-232/422/485 port. 
Since A/V systems only enhance a 
presentation when they run smoothly, 
the AV-452’s most important feature 
is to help the presenter. It helps the 
speaker operate their presentation 
as one complete unit, increasing their 
confi  dence and allowing them to focus 
on what they do best.  A/V presentations have become routine 
for middle management, educators and 
other public speakers. With its universal 
learning remote and IR blaster func-
tions, the AV-452 is designed to control 
a sophisticated A/V system as a single, 
integrated unit. 
The AV-452 was designed primar-
ily to assist with switching audio and 
video sources and to allow presenters 
to be heard. Four microphone inputs 
are available on XLR and barrier strips, 
enough for multiple presenters and au-
dience participation. Each microphone 
input has three-band EQ, level and mute 
controls, and the installer can switch on 
a 100Hz rolloff on the mic group. 
The fi  ve A/V inputs are provided for 
cassette, CD-RW, DVD, VCR and Aux de-
vices. The A/V inputs include S-Video 
and Composite video, and sources can 
be routed to other destinations for dub- 
						

							RGB 1
AMP A&B  (L/R)
MIC PANELS
     TO MIC INPUTS
INTERCOM
INPUT
CONSTANT VOLTAGE
SPEAKER SYSTEMCOMPOSITE
 S-VIDEO,
   & RGB 2
DVD
CASSETTE
& CD-RWWIRELESS
MICS
ROOM VOLUMEROOM VOLUMERGB 1RGB 1RGB 2RGB 2CASSETTECASSETTEREC MONITOR
DIM MUTE MUTE MUTE MUTEMIC 1MIC 2AV-452MIC 3MIC 4AVSOURCE
CD-RCD-RWCASSCASS
AUDIO ONLAUDIO ONLY
AUDIO VIDEOAUDIO VIDEO
CD-RW
DVD
VIDEOLR
AUX IN
AUX INAUX INRGB 2 INRGB 2 INPHONESPHONES
AMP A INTERCOMINTERCOMAMP B CASCADE INCASCADE IN
VCRVCREQ
HI
MIDMIDLO
EQ
HI
MIDMIDLO
EQ
HI
MID
LOEQ
HI
MID
LO
LO
EQ
HI
MIDMIDLO
OL
GAINOL
GAINOL
GAINOL
GAIN10
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ROOM A
RGB 1ROOM B
AMP A
MIC PANELS
     TO MIC INPUTS
INTERCOM
INPUT
CONSTANT VOLTAGE
SPEAKER SYSTEMCOMPOSITE
 S-VIDEO,
   & RGB 2AMP B
DVD
CASSETTE
& CD-RWWIRELESS
MICS
ROOM VOLUMEROOM VOLUMERGB 1RGB 1RGB 2RGB 2CASSETTECASSETTEREC MONITREC MONITOR
DIMDIMMUTE MUTE MUTE MUTEMIC 1MIC 2AV-452MIC 3MIC 4AVSOURCE
CD-RCD-RWCASS
AUDIO ONLY
AUDIO VIDEOCD-RW
DVD
VIDEOLR
AUX IN
AUX INAUX INAUX INRGB 2 INRGB 2 INPHONESAMP A INTERCOM
INTERCOMAMP B CASCADE IN
VCREQ
HI
MID
LOEQ
HI
MID
LOEQ
HI
MID
LOEQ
HI
MID
LOEQ
HI
MID
LOOL
GAINGAINOL
GAINOL
GAINOL
GAIN10
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10/10/03
Page 2 of 4AV-452 Applications Guide
Single Room Setups
Dual Room Feed
T
his simple setup shows the AV-452 at the cen-
ter of a single room setup. This is a common 
arrangement for boardrooms, small churches and 
school presentation rooms. Mic panels in the walls 
allow up to four microphones to be connected to the 
AV -452, or wireless microphones can be connected 
in their place. The DVD player and Cassette/CD-RW 
combo are connected to their dedicated inputs and 
can be switched from the AV-452’s front panel or 
learning remote control. 
The AV-452’s internal 100W amplifi er provides 
power for the distributed speaker system. A con-
stant voltage input allows the building’s intercom 
system to be wired directly into the mixer, so the 
presenter can turn off background music during 
presentations. A gate on the CV line can still pass 
announcements and emergency alerts. 
In this case, the AV-452 functions not only as 
a small PA and A/V amplifi  er, but also as a video 
switcher and master controller for the system. 
H
otel conference rooms commonly employ fold-
ing partitions so that the room can be divided 
for two smaller events. A hotel with modest needs 
can use a single AV-452 in this joined setup. 
The A/V equipment is placed in Room A, and will 
only be available in that room. When the partitions 
are open, both Amp A and Amp B are switched on 
from the AV-452’s front panel. When a small group 
needs to use room B and the partition is closed, 
Amp B is switched off. The installer can even wire 
a toggle switch to the wall in room B to switch that 
room’s amplifi  er off on the AV-452. 
If the client needs two stereo feeds for mul-
timedia presentations with this setup, you can 
add an external power amplifi  er for room A, use 
the internal amps for room B, and have the same 
individual control over the two rooms.  
						

							MIC PANELS
TO MIC INPUTS RGB 2
S-VIDEO
COMPOSITERGB 1
AMP B
AMP A
INTERCOM
INPUT
CONSTANT VOLTAGE
SPEAKER SYSTEMST OUT
DVD
CASSETTE
& CD-RWWIRELESS
MICS
CONFERENCE
ROOMPATIO
LADIES
RESTROOMHALL MENS
RESTROOM
CLIPCLIPPOWERSTEREO AMPLIFIER
ROOM VOLUME RGB 1RGB 1RGB 2RGB 2CASSETTE REC MONITREC MONITORORDIM MUTE MUTE MUTE MUTEMIC 1MIC 2AV-452MIC 3MIC 4AVSOURCESOURCECD-RWCASS
AUDIO ONL
AUDIO ONLY
AUDIO VIDEOAUDIO VIDEO
CD-RW
DVDDVDVIDEOLR
AUX INAUX INRGB 2 INRGB 2 INPHONESAMP
AMP A INTERCOMINTERCOMAMP B CASCADE IN
VCREQ
HI
MIDMIDLO
EQ
HI
MID
LOEQ
HI
MID
LOEQ
HIHIMID
LOEQ
HI
MID
LOOL
GAINOL
GAINOL
GAINOL
GAIN10
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0
ROOM A
RGB 1
RGB 2,
S-VIDEO
COMPOSITERGB 2,
S-VIDEO
COMPOSITERGB 1 ROOM B
AMP A&B  (L/R)
STEREO OUT TO
CASCADE IN
MIC PANELS TO
     MIC INPUTSMIC PANELS TO 
MIC INPUTS
CONSTANT VOLTAGE
SPEAKER SYSTEMCONSTANT VOLTAGE
SPEAKER SYSTEM
DVD
CASSETTE
& CD-RWCASSETTE
& CD-RWDVDWIRELESS
MICS
AMP A&B  (L/R)
ROOM VOLUMEROOM VOLUMERGB 1
RGB 2 CASSETTECASSETTEREC MONITREC MONITOR
DIM MUTE MUTE MUTE MUTEMIC 1MIC 2AV-452MIC 3MIC 4MIC 4AVSOURCESOURCECD-RWCASSCASS
AUDIO ONLAUDIO ONLY
AUDIO VIDEOAUDIO VIDEOCD-RW
DVD
VIDEOLR
AUX IN
AUX INAUX INAUX INRGB 2 INRGB 2 INPHONESAMP A INTERCOMINTERCOMAMP B CASCADE IN
VCREQ
HI
MID
LOEQ
HI
MIDMIDLOEQ
HI
MID
LOEQ
HI
MID
LOEQ
HI
MID
LOOL
GAINGAINOL
GAINOL
GAINOL
GAINGAIN10
9
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1
0ROOM VOLUMEROOM VOLUMERGB 1RGB 1RGB 2RGB 2CASSETTE REC MONITREC MONITOR
DIM MUTEMUTEMUTE MUTEMUTEMUTEMIC 1MIC 2AV-452MIC 3MIC 4AVSOURCE
CD-RWCASS
AUDIO ONL
AUDIO ONLY
AUDIO VIDEOAUDIO VIDEOCD-RW
DVD
VIDEOVIDEOLR
AUX INAUX INAUX INRGB 2 INRGB 2 INPHONESPHONESAMP A INTERCOMINTERCOMAMPAMP B BCASCADE INCASCADE INVCREQ
HI
MID
LOEQ
HI
MID
LOEQ
HI
MIDMIDLOEQ
HI
MIDMIDLOEQ
HI
MID
LOOL
GAINOL
GAINGAINOL
GAINGAINOL
GAIN10
9
8
7
6
5
4
3
2
1
010
9
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5
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1
010
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10/10/03
Page 3 of 4AV-452 Applications Guide
Two Cascaded Rooms
Single Room in Multiple Zones
S
imilar to the previous example, this installation 
shows a hotel conference room with a center 
divider. The difference with this installation is that 
each room has its own A/V setup. When the two 
rooms are joined together, the Cascade button is 
pressed on the mixer in room B. This button over-
rides the rest of the settings on the AV-452 in room 
B and instead amplifi  es the signal from room A. 
Both rooms in this example play their audio back 
in stereo. 
Other applications of the Cascade function 
include the ability to use an external submixer 
or microphone mixer for large presentations. In 
this mode, the AV-452 amplifi es the signal from 
the Cascade input in addition to its four mic inputs 
and A/V components. 
I
t’s not uncommon for a large presentation hall 
to need amplifi cation for several zones. Some 
examples of exterior zones may be the hallway 
outside of a presentation, the restrooms and the 
outdoor patio. 
In this setup, the AV-452 is connected to a power 
amplifi  er for use in the main room. The internal 
Amp A and Amp B in the AV-452 power the hall-
way and patio zones. If the presenter doesn’t want 
his presentation to play in those zones, they can 
be turned off without effecting the sound inside 
of the room by pressing the Amp A and Amp B 
switches. 
In this installation, the AV-452’s amplifi ers are 
set to mono, but the presentation in the main room 
still plays through the power amp in stereo. Like 
each of the other installations, the presenter has 
instant control over his or her audio and video 
sources, and can even switch the projector’s source 
from the AV-452’s front panel, learning remote 
control or toggle switch controls installed on the 
lectern.  
						

							10/10/03
Page 4 of 4AV-452 Applications Guide
7733 Telegraph Rd • Montebello, CA • 90640 • phone 323.726.0303  •  www.tascam.com
AV-452 Connections
© 2003 TEAC Corporation  All trademarks are the property of their respective holders. All rights reserved. Design and specifi cations 
subject to change without notice.  Product photographs are shown only to illustrate the types of product which are compatible with 
the TASCAM AV-452.  These products are not manufactured by the TASCAM Division of TEAC Corporation.
˘ Stereo RCA Cassette Input
˘ Stereo RCA Cassette Output
˘ Stereo RCA CD-RW Input
˘ Stereo RCA CD-RW Output
˘ Stereo RCA VCR Input
˘ Stereo RCA VCR Output
˘ Stereo RCA DVD Input
˘ Stereo RCA Meeting Record Output
˘ (4) XLR-F Microphone Inputs
˘ Barrier Strip for four microphone inputs 
and Intercom input
˘ Stereo XLR Output
˘ Stereo XLR Cascade Input 
˘ Banana Plug Amp A Output
˘ Banana Plug Amp B Output
˘ Composite and S-Video Monitor Output
˘ Composite and S-Video VCR Input
˘ Composite and S-Video VCR Output
˘ Composite and S-Video DVD Input
˘ HD15 RGB 2 Thru
˘ DB37 Parallel Control 
˘ DB9 for RS-232/422/485 control
˘ Power Input and Voltage Selector