Peavey CEQ 28R User manual

OPERATING INSTRUCTIONS
CEQ 28R

INTRODUCTION
1. DESCRIPTION
Thank
you
for
purchasing
the
Peavey
Architectural
Acoustics
CEQ™
28R.
If
you
are
not
yet
familiar
with
the
operation
of
the
Peavey
Architectural
Acoustics
CEQ"
28,
we
recommend
that
you
take
a
few
minutes
to
read
the
CEQ
28
manual
and
familiarize
yourself
with
its
operation
before
proceeding
with
this
manual.
The
CEQ
2BR
is
a
28
band,
1/3
octave
graphic
equalizer
that
isa
companion
to
the
CEQ
28.
It
can
be
used
asa
slave
equalizer
that
tracks
EQ
changes
made
on
the
CEQ
28
or
as
an
independent
equalizer
that
is
remotely
controlled
from
the
CEQ
28.
When
the
CEQ
28R
is
used
as
a
remote
expander,
the
CEQ
28
front
panel
controls
and
display
are
used
to
control
the
CEQ
28R
so
that
it
operates
just
like
the
CEQ
28.
By
adding
CEQ
28Rs,
up
to
16
channels
of
audio
can
be
individually
equalized
from
one
CEQ
28.
Once
curves
are
loaded
or
created
in
the
CEQ
28R,
the
CEQ
28
can
be
removed
so
that
the
EQ
curve
you
have
carefully
created
cannot
be
altered.
However,
any
of
the
128 stored curves can be recalled via MIDI program
change
commands
(if
enabled),
or
the
CEQ
28R
can
be
set
to a mode that allows one of 2, 4, or8 presets to be recalled
from the front panei.
2. FEATURES
e 28-Band graphic equalizer on 1/3 octave centers
e 26-Band constant Q filters
e Top and bottom bands (32 Hz and 16 kHz) are shelving
filters
e MIDI controllable sliders, */- 12 dB in 1 dB steps, or */-6
dB in 0.5 dB steps
128 Complete EQ curve memories
Curves may be added
Multi-function display
Turn On/Off transient muting
Compact 1 I.U. rack-mount configuration
FRONT PANEL
AREUITECTURAL
CEQ"
28R
1. 7-segment display
2. Select button
The Select button and display can be set for 5 different
display and control modes for selecting the MIDI channel
or recalling EQ curves.
Il. FRONT PANEL DISPLAY AND CONTROL OPTIONS
1. DISPLAY MODES
There are five different front panel display and control
modes. (The CEQ 28R is shipped from the factory in Mode
1)
MODE 1:
The front panel 7 segment display indicates the
CEQ 28R's MIDI listening channel. The decimal point
lights to indicate when the CEQ 28R is in OMNI mode. The
Select button is used to change the MIDI channel.
MODE 2:
The display functions the same as Mode 1, but the
Select button is disabled.
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3. Power ON/OFF
4. Equalizer Bypass
MODES 3, 4, & 5:
In modes 3, 4, and 5, the MIDI channel is displayed and
can be changed the first 3 seconds after the CEQ 28R is
turned on. Theselect button can then be used to recall one
of the available preset curves and the number of the curve
is displayed.
MODE 3:
Preset curve 1 or 2 can be recalled.
MODE 4:
Preset curve 1, 2, 3, or 4 can be recalled.
MODE 5:
Preset curve 1, 2, 3,... 7, or 8 can be recalled.

2. CHANGING THE DISPLAY MODE
To change operating mode:
1. Turn off the power switch and disconnect the power
cord.
2. Remove the 7 screws that secure the top.
3. Locate the header and jumper as shown in the
diagram below.
4. Plug the jumper into the header in the position that
corresponds with desired mode.
5. Replace the 7 screws that secure the top.
Figure 2
3. MIDI CHANNEL DISPLAY
MIDI channels 1 through 16 can be selected as de-
scribed above and will appear on the display as:
CHANNEL DISPLAY CHANNEL DISPLAY
1 - 1 9. «^9
2 - 2 JU: - A
3 - 3 11 - b
4 - 4 12 - C
5 - 5 1. - d
6 - s 14 - EÈ
fe os 15 - F
8 - 8 16 - g
The decimal point, when lit, indicates that OMNI receive
mode is on.
-
OMNI receive mode only applies to the receipt of MID!
program change and controller change commands.
System exclusive messages are still only received on the
selected channel.
* <--
4. TO SELECT A NEW MIDI CHANNEL
Press and hold the select button until the desired
channel appears in the display. You must be either in
mode 1 or press the button during the first 3 seconds after
turning the power on if in modes 3, 4, or 5. There is along
delay before the display actually starts changing to
prevent the channel from accidently being changed, so be
patient. The channel number increases in sequence "1"
through “g” first with OMNI mode off, then again with
OMNI mode on.
5. EQUALIZER BYPASS
The CEQ 28R equalizer can be bypassed by pressing
the bypass switch located below the power switch on the
front panel. When the equalizer is bypassed, the center
bar of the display lights as shown below:
When the equalizer is bypassed, the subsonic filter
remains in the circuit to protect the speaker system.
6. MIDI ACTIVITY
Whenever a valid MIDI message is received by the
CEQ 28R, the display indicates MIDI activity by dis-
playing 3 horizontal bars as shown below.
Ili. CEQ 28 REMOTE CONTROL OF THE CEQ 28R
This manual assumes that you are familiar with the
operation of the CEQ 28. if you are unfamiliar with the
CEQ 28, take a few minutes to go through the CEQ 28
manual with the CEQ 28.
1. MIDI COMMUNICATION
When the CEQ 28 is in the “Remote” mode to control an
CEQ 28R, MIDI system exclusive messages are used
which must be on the receiving units channel. The
communication in this mode is two-way. For each mes-
sage that the CEQ 28R receives, it must send a return
message that either contains the requested information
(like current EQ curve data, label for a preset, etc.) or
acknowledges the receipt of information.
2. MIDI CONNECTIONS BETWEEN THE CEQ 28 AND
CEQ 28R
To establish the required two-way communication, the
CEQ 28 and CEQ 28R(s) are wired in a loop. The MIDI
output of the CEQ 28 goes to the MIDI input of the first
CEQ 28R. The CEQ 28R is MIDI output then goes to the
MIDI input of the next CEQ 28R, until the output of the
final CEQ 28R is connected to the MIDI input of the
CEQ 28.

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3. SETTING THE MIDI CHANNEL FOR REMOTE
COMMUNICATION
The CEQ 28 and each CEQ 28R must be set to a different
MIDI channel. If an CEQ 28R is set to the same channel as
another CEQ 28R or the master CEQ 28, proper com-
munication will not take place.
TECHNICAL EXPLANATION
When a CEQ 28R receives a system exclusive message
that is not on its channel, itechoes the message to its MIDI
output. System exclusive messages that the CEQ 28R
receives on its listening channel are not echoed to its
output. So, if more than one CEQ 28R were on the same
channel, messages would never reach the second
CEQ 28R. If an CEQ 28R were on the same channel as the
CEQ 28 master, that CEQ 28R would intercept messages
intended for the master and an error message would
appear on the CEQ 28's display.
A. ASSIGN PAGE FUNCTIONS
1. SELECTING A CEQ 28R FOR REMOTE CONTROL
For this section, connect one CEQ 28R to the CEQ 28
and follow along with the instructions.
Set the CEQ 28 to MID! channel 1 and the CEQ 28R to
MIDI channel 2.
Press the Assign button on the CEQ 28R.
Use
the
left
or
right
(
<
or
>
)
cursor
keys
to
move
the
blinking
cursor
to
the
left
of
Remote
channel
select.
LOCAL *REMOTE-CH 1 EQ RANGE 12dB
EXIT SUB ON FB-FIND OFF VIEW ANGLE 260
Use the Up or Down cursor keys( A or V )toselect
the channel of the CEQ 28R that you wish to control.
Now move the cursor to the left of the “LOCAL” mode
label.
— *LOCAL REMOTE-CH 2 MQ RANGE 12dB
= EXIT SUB ON FB-FIND OFF VIEW ANGLE @60
Press either the Up or Down cursor keys( A or V )to
toggle the CEQ 28 into the Remote control mode. If the
CEQ 28R responds with all of the appropriate data, the
following display will momentarily appear on the
CEQ 28.
L CEQ 28R 2 ON LINE
[3] SOFIWEARE VERSION 1.00
The assign page then reappears with the Local label
replaced by Remote, and EQ range and Subsonic switches
reflecting the way the CEQ 28R is set.
L *REMOTE REMOTE-CH 2 EQ RANGE 12dB
[5
EXIT
SUB
ON
FB-FIND
OFF
VIEW
ANGLE
260
If, instead of the above message, thefollowing message
appeared,
A MIDI ERROR HAS OCCURRED!
EXIT CEQ 28R DID NOT RESPOND
check to see that:
— The MID! output of the CEQ 28 is connected to the MIDI
input of the CEQ 28R.
— The MIDI output of the CEQ 28R is connected to the
MIDI input of the CEQ 28.
— The remote channel that you selected in the CEQ 28
display is the same as the channel that the CEQ 28R is
set to (MIDI channel 2).
— The CEQ 28 is set to a different MIDI channel than
any of the CEQ 28Rs.
— The CEQ 28 is set to receive MIDI system exclusive
messages.
This message will appear any time during remote
operation of the two-way communication between the
CEQ 28 and CEQ 28R is lost.
Toreturn to control of the CEQ 28, position the cursorto
the left of the “REMOTE” model label. Press either the up
or down cursor key to get into Local Mode.
2. EQ RANGE, SUBSONIC FILTER, AND FEEDBACK
FIND
The 40 Hz subsonic filter and EQ range can now be
changed in the remote CEQ 28R by positioning the
blinking cursor to the left of the desired parameter, then
using the UP or DOWN keys to change that parameter.
This is the same way that these functions would be
changed on the CEQ 28. However, because the feed-back-
find feature works with the line signal going through the
CEQ 28, you cannot access this feature while in the
REMOTE mode.
3. EO DISPLAY AND FUNCTIONS
Press the EQ function selector button.
The EQ display now shows the curve of the remote
CEQ 28R.
Pressing the DSPL soft key once will selectthe vertical 6
band EQ display mode.
Pressing the DSPL soft key again will select the "Set
Equalizer Flat" display.
Em FLAT
Wo DSPL
Set Equalizer FLAT?
Pressing the DSPL soft key athird time will return you to
the original EQ display. Because the CEQ 28R does not
have an RTA, the EQ over RTA display is omitted.
Use the cursor keys to adjust the equalizer. As you see,
the buttons and display behave the same as when you are
in the "Local" mode controlling the CEQ 28. You may
notice, however, that the rate the cursor scrolls as you
hold the button down to raise or lower the level of a band
may vary slightly as the number of CEQ 28Rs in the loop is
increased.
Pressing the “OPT” key brings up the ADD EQ curve
display which works the same as the corresponding
CEQ 28 display. Pressing the UP or DOWN keys with the
cursorto the left of ADD toggles the ADD mode on and off.
When the cursorisatthe added program number, pressing

the up or down keys changes the program preset that is
added to the current EQ curve. The change actually takes
place when you release the button.
Pressing the EXIT soft key returns you to EQ display.
If you press the NEXT soft key, the "compare two
curves" display appears. This also functions the same as
the CEQ 28.
4. STORE
The store display and functions are the same as those in
the CEQ 28.
To store a curve, press the STORE button.
STORE PROGRAM *(Xl
EXIT Prog 1
Now, using the UP A or V DOWN keys to select a
new character. The LEFT or RIGHT arrow keys are used to
select which of the 8 character positions you wish to
change.
To change the user label, press the RIGHT > arrow key
and the display will look like this:
L STORE PROGRAM X
= EXIT * Prog £l
The underline cursor indicates the character of the label
to be modified. Use the UP A or V DOWN keys to selecta
new character. The LEFT or RIGHT arrow keys are used to
select which of the 8 character positions you wish to
change.
To store a curve, press the STORE soft key (The top soft
key). The display will momentarily show:
STORE COMPLETE
LEE
Your
curve
and
label
are
now
stored.
If
you
have
the
CEQ
28R
front
panel
set
to
modes
3,
4,
or
5,
where
the
user
can
recall
preset
curves,
be
sure
to
store
the
curve
in
a
location
that
can
be
accessed.
5. RECALL
The
RECALL
display
and
functions
are
the
same
as
those
in
the
CEQ
28.
To
recall
a
stored
EQ
curve,
press
the
RECALL
button
and
the
recall
display
wil!
appear.
= RECALL: PROGRAM *@Z1 ADD —-
— EXIT Prog 9l
Use the UP A or V DOWN arrow keys to select the
program preset curve to recall. The user label at the
bottom of the display will not be updated to reflect the
newly selected preset until the button is released.
Pressing the RIGHT arrow > key will move the cursor
to the left of the ADD label and allow the selected preset
curve to be recalled with or without an ADD curve.
= RECALL PROGRAM 001 ¥*ADD 23
p EXIT Prog 21 Prog %3
If the ADD function is on, the cursor may be moved to
the rightto select the program preset number to be added.
For more information on adding curves, refer to the
CEQ 28 manual.
To recall the selected curve, press the recall soft key
(top soft key). The following display will momentarily
appear.
RECALL COMPLETE
m
Recall Complete.
B. MIDI PAGE FUNCTIONS
1.
MIDI
MAIN
MENU
Press
the
MIDI
selector
button
and
the
following
display will appear.
NEXT CEQ 28R 2 MIDI FUNCT: *CONT CNTRL
EXIT *SWITCHES SEND/RECEIVE SYS EXCL
Use
the
left
or
right
(<
or
>
)
cursor
keys
to
select
the
desired
function.
Then
press
the
“NEXT”
soft
key
to
go
to
that
display.
2. SETTING MIDI CONTINUOUS CONTROLLERS
Select the set continuous controllers function (Place
the cursor to the left of “CONT CNTRL”). Now press the
“NEXT” soft key. The following display will appear.
CEQ 28R 2 EQ GAIN ON CONTL *(228
EXIT FQ SLIDERS ON CC @@1 TO 228
Individual
EQ
"sliders"
can
be
controlled
via
MIDI
continuous
controller
messages.
The
controller
numbers
are
assigned
in
this
page.
The
29
sliders
are
configured
as
a
contiguous
block,
starting
with
EQ
gain,
then
the
32
Hz
band,
followed
by
40
Hz,
on
up
to
the
16
kHz
band.
The
starting
controller
number
can
be
changed
by
using
the
upordown(
A
or
V
)cursor
keys
to
a
value
ranging
from
0
to
92.
NOTE:
You
may
notice,
as
you
change
the
controller
number,
that
the
display
will
skip
some
blocks
of
numbers.
This
happens
because
the
CEQ
28
checks
for
conflict
between
the
Gain
and
EQ
Slider
block
and
the
Subsonic
and
EQ
Range
MIDI
controller
switches,
and
skips
numbers
that
would
cause
more
than
one
control
to
be
assigned
to
one
number.
3.
MIDI
Subsonic
and
EQ
Range
switches
The
Subsonic
filter
and
EQ
Range
can
be
changed
by
using
MIDI
controller
change
commands.
The
controller
number
assigned
to
each
of
these
switches
is
selected
in
the
MIDI
Switches
display.
= SET CEQ 28R 2 MIDI Switches:
ir EXIT *SUBSONIC CC @64 EQ RANGE CC Go5
Pressing the LEFT < or > RIGHT cursor keys
selects either the subsonic or EQ range controller and the
UP A or v DOWN keys change the controller
number.
4. MIDI SEND AND RECEIVE ENABLE
The receipt of MIDI program change and controller
change commands can be enabled or disabled in this
display.
In the MID! main menu, move the blinking cursor to the
left of the SEND/RECEIVE label.
ns
NEXT
CEQ
28R
2
MIDI
FUNCT:
CONT
CNTRL
=
EXIT
SWITCHES
*SEND/RECEIVE
SYS
EXCL
Press
the
NEXT
soft
key
to
go
to
the
send/receive
display.
L_
CEQ
28R
2
MIDT
Receive
Enable
Ti]
EXIT
RECV:*PROG
CHG
YES
CONTL
CHG
YES

Use the LEFT < or > RIGHT arrow keys to select
the parameter to change and the UP A or V DOWN
keys to toggle the receive enable between YES and NO.
5. MIDI SYSTEM EXCLUSIVE (DUMP PRESET)
To dump one or all presets from the CEQ 28R to the
CEQ 28, connect only one CEQ 28R to the CEQ 28 as
shown below.
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Set both units to the SAME MIDI channel.
On the CEQ 28, select Remote mode to control the
CEQ 28R.
NOTE: Dumping preset curves from the CEQ 28R to the
CEQ 28 will destroy the existing CEQ 28 curve stored in
that preset location. For example: If you dump preset #1
from the CEQ 28R to the CEQ 28, the CEQ 28's preset #1
will be replaced with preset #1 dumped from the CEQ 28R.
Press the MIDI button. Now use the left or right cursor
keys to move the blinking cursor to the left of the SYS
EXCL label.
x22 NEXT CEQ 28R 1 MIDI FUNCT: CONT CNTRL
I EXIT SWITCHES SEND/RECEIVE *SYS EXCL
Press the NEXT soft key and the following display will
appear.
= EXECUTE CEQ 28R 1 SYSTEM EXCLUSIVE
Fi EXIT *DUMP PRESET Ql
Use the up or down cursor keys to select the preset to be
dumped or select ALL to dump all 128 presets. (ALL is
below 001 or above 128)
Press the EXECUTE soft key to send the Dump request
to the CEQ 28R.
The CEQ 28 will display:
SYSTEM EXCLUSIVE
IN PROGRESS
The
CEQ
28R
will
show
the
three
bar
MIDI
activity
display.
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To dump presets to another device, you can either send
a MIDI dump request from that device as described in the
MIDI System Exclusive specification; or you can proceed
as instructed above, but, just before pressing the
EXECUTE soft key, connect the receiving device to the
MIDI output of the CEQ 28R. The CEQ 28 will show the
following message on the display.
td SYSTEM EXCLUSIVE
— DUMP PRESET SENT
When performing a system exclusive dump from the
CEQ 28R, its MIDI output need not be connected to the
CEQ 28 MIDI input.
6. CEQ 28R MIDI COMMAND SUMMARY
The CEQ 28R responds to MIDI program change com-
mands by recalling the Preset EQ curve requested. The
CEQ 28R must be listening on the correct MIDI channel or
be in OMNI mode. When the CEQ 28R receives a valid
program change command, it will display 3 bars in its front
panel display.
The CEQ 28R will receive MIDI controller commands
that are on the correct MIDI channel and for controller
numbers assigned to EQ sliders or switches. The CEQ 28R
responds by displaying the 3 bar MIDI activity indicator
and by changing the appropriate EQ slider or switch.
When in OMNI mode, the CEQ 28R will receive MIDI
controller changes messages sent on any channel.
The system exclusive messages that the CEQ 28R sends
and receives are outlined in the MIDI implementation
anntinn

7. FACTORY RESET OF MEMORY
If you have changed many of the MIDI communication
parameters
or
if
you
wish
to
erase
all
of
the
EQ
curve
stored in memory, you can reset the CEQ 28's memory to
the factory settings.
CAUTION: When the following action is performed, all
of the stored curves, EQ settings, and other setup changes
are
returned
to
the
factory
settings.
ALL
STORED
CURVES
ARE
LOST!
If
you
wish
to
save
any
of
the
stored
curves, use a MIDI System Exclusive dump to the CEQ 28.
Connect
the
CEQ
28R
and
CEQ
28
together
via
MIDI.
Turn the CEQ 28R power on and the CEQ 28 power off.
Press and hold the RECALL and STORE keys on the
CEQ 28 while turning the CEQ 28's power on. The
following display will appear.
= WARNING: RESET OF CEQ 28R MEMORY
— PROCEED WITH CAUTION!!!
pi
o
Amplifier
Mixer Console
Now simultaneously press the left and right cursor keys.
The display will change to:
= EXECUTE
UE EXIT
RESET CEQ 28R 2 MEMORY
Use UP or DOWN keys to Select
Use
the
up
or
down
cursor
keys
to
select
the
number
of
the
CEQ
28
to
reset.
Press the EXECUTE soft key (top soft key) to perform
the memory reset. Pressing the EXIT soft key aborts reset.
8. RTA EQUALIZATION USING THE CEQ 28 AND
CEQ 28R
The
RTA
built
into
the
CEQ
28
can
be
used
to
remotely
equalize
a
sound
system
with
the
CEQ
28R.
The
RTA
and
auto-equalization
functions
look
identical
to
those
for
the
CEQ
28
alone,
but
the
CEQ
28R
is
actually
adjusted
instead
of
the
CEQ
28.
First,
connect
the
CEQ
28
and
CEQ
28R
as
shown
below.
5
INPUTS
WARNING
ii RISK CE FIRE AND? able
: A AE
AREL
RET? HMVGINS; TF) QUA IET
GEHEF UL HSONNET
UNBALANCED " t yE EF US UORD
BAL ACIE EAS IVR
“rp BRE VENT TH
HAZARD GO ty E TH s AML
T^ RA. OR N E
COBRA NG 8 6
h INSIDE E vi
UNE OIL
HA ANLE
Speaker
PVR™ Microphone
F,
Then connect the sample microphone to the RTA mic
input of the CEQ 28. Be sure that the CEQ 28R is
connected to the sound system that you are about to
equalize and that it is not in the bypass mode. Connect the
pink-noise source to the sound system that you are about
to equalize. Select the CEQ 28R you wish to adjust and
then switch to remote control mode. Press the RTA button
on the CEQ 28 and proceed with the Auto-equalization as
you would for the CEQ 28 and as described in the CEQ 28
manual. For best results, we recommend that you equalize
the system with the microphones turned on but below
feedback. This will help take into consideration the affect
of acoustic interaction between the microphones and
speakers on the system's frequency response.

After completing the equalization of the system with the
CEQ 28R, press the EQ button to examine the resulting
curve. If some bands are set to large amounts of boost, you
may wish to cut them manually before proceeding to store
the curve. You should pay particular attention to the
lowest and highest frequency bands. If all looks well, then
store the curve in one of the 128 presets. If you plan on
using the front panel recall feature on the CEQ 28R, be
sure to store the curve in one of the locations that the front
panel can access. For the recall of two preset curves
mode, it must be stored in locations 1 or 2. For the recall of
4 preset curves mode, it must be in 1, 2, 3, or 4. For recall of
8, it must be stored in 1 to 8.
IV. THE CEQ 28 TRACKS THE CEQ 28R
1. DESCRIPTION
In this mode of operation, the CEQ 28H will always have
the same EQ curve as the CEQ 28 it's connected to. As the
NOISE
SOAS
eo.
$ € GF. A
OUTPUTS
WE
OUTPUTS
NBAL ANTE. cd
EQ curve is manually adjusted, the same changes will be
made in the CEQ 28R. This mode can be useful for stereo
operation when you want to equalize both channels the
same to maintain proper stereo imaging.
2. CONNECTIONS AND SETUP
Connect the MIDI output of the CEQ 28 to the MIDI
input of the CEQ 28R.
Set both the CEQ 28 and CEQ 28R to the same MIDI
channel, or set the CEQ 28R to the OMNI receive mode.
Set the CEQ 28 to send MIDI program change and
controller change messages. The CEQ 28R must also be
set to receive these messages.
Be sure that both the CEQ 28 and CEQ 28R have the EQ
sliders and MIDI switches set to the same MID! controller
numbers.
INPUT: RIA MIC INPUTS
eee"
BA ACT C UNBA, ANCE)
RA ANDEL BALANCE i
WARNING
0 P-EVEN" LOU FRANU dO
warner DONC Y E XPOSE "HIS APPLIANCE
KAIN GH NOS D. UO NIT RF MOVE
AER SE RIIGI AI E FAIS
EFES SERVICING TO OLAI EI D
SERY CF. PERSONNEL
AV NS. HISQUE Zt CACC E. ELITRE
NE PAS GUV TE
RNING WA
TOPREVENT ! ae FISK OF FIFE AND SIGGA
AAZARL DO SC” EXPOSE THIS APPLIANTI
TG RAIN OR MOISTURE DO MC RAMON!
ZCVER NO LSEH SERVIC-ARI: PARI
N INS DE | HEFZH SEHN CING TO CUL, to
SERVICE PFRSONNEI
- * AVIS H$SOLF DF SHOL EL CRD.
Bar ANCES BALANCE: NF FAS OU HIA

NOTE: The CEQ 28 and CEQ 28R are set up, ready for
communication from the factory.
Now, as you manually adjust an EQ slider on the
CEQ 28, the same change is being made on the CEQ 28R.
You can confirm that the CEQ 28R is getting the messages
if the CEQ 28R display changes to 3 bars when an EQ
change is made.
What we have not yet considered is that the two
equalizers may contain different EQ curves when we start.
Each time an EQ band is adjusted on the CEQ 28, the
corresponding band on the CEQ 28R will be set the same.
However, if you don't adjust all bands of the equalizer,
then the unadjusted bands may be set differently. Itis best
to either set both equalizers flat or recall identical curves
before starting manual adjustment.
We also must consider what happens when a curve is
recalled on the CEQ 28. Performing a recall on the CEQ 28
causes the corresponding preset on the CEQ 28R to be
recalled. But if the CEQ 28 and CEQ 28R have different
curves stored in their preset memories, the two EQ curves
will be different. The best way to solve these problems is to
dump the desired preset curves (or ALL presets) via a
system exclusive dump from the CEQ 28 to the CEQ 28R.
Then recall one of those curves to assure that both units
have the same EQ settings. If you create a new curve and
store
it
in
the
CEQ
28,
be
sure
to
remember
to
also
dump
the
preset
containing
the
new
curve
to
the
CEQ
28R.
If you want additional CEQ 28Rs to track the master
CEQ 28, connect each in turn to the MIDI output of the
previous
CEQ
28R.
Taking
the
signal
from
the
CEQ
28R's
MIDI
output
instead
of
its
thru
keeps
the
MIDI
signal
from
deteriorating as multiple units are added.
CEQ™ 28R SPECIFICATIONS
All specifications are typical unless
otherwise noted.
0 dBV - 1 Voit
All specifications are referenced to
nominal output level
(0 dBV) unless otherwise noted.
All measurements are wideband 20 Hz to
20 kHz unless otherwise stated.
NOTE: All specs measured at 1V RMS
input and unbalanced output. All sliders at
mid position, all switches out unless
otherwise noted.
Frequency Response: (Balanced and
Unbalanced Outputs)
+/- 1 dB 20 Hz - 20 kHz
Distortion:
Less than .01% (20 - 20K) .005% Typical
Common Mode Rejection Ratio (CMRR):
36 dB Typical
Input Impedance:
Unbalanced: 20K ohms
Balanced: 20K ohms (equal impedances
to ground)
Output Impedance:
Unbalanced: 1K ohms
Balanced: 2K ohms
Maximum Input Level:
Unbalanced: +23 dBV (14V RMS)
Balanced: +23 dBV (14V RMS)
Maximum Output Level:
Unbalanced: +17 dBV (7V RMS)
Balanced: +23 dBV (14V RMS)
Nominal Input Level:
Unbalanced: 0 dBV (1V RMS)
Balanced: 0 dBV (1V RMS)
Nominal Output Level:
Unbalanced: 0 dBV (1V RMS)
Balanced: +6 dBV (2V RMS)
Input Headroom:
Nominal = 23 dB
Output Headroom:
Unbalanced: 17 dB
Balanced: 17 dB
Output Noise: Unbalanced Output
EQ Out: -95 dBV
EQ In, all Flat: -90 dBV
Filler Bandwidth:
1/3 Octave
Filter Frequencies:
31.6, 40, 50, 63, 80, 100, 125, 160, 200,
250, 316, 400, 500, 630, 800, 1K, 1.25K,
1.6K, 2K, 2.5K, 3.16K, 4K, 5K, 6.3K, BK,
10K, 12.5K, 16K
Filter Q:
4.77
40 Hz to 12.5 kHz
Shelving Filters:
32 Hz and 16 kHz are 12 dB octave
Maximum Boost & Cut Filters:
+/- 12 dB (+/- 12 dB Position)
*/- 6 dB (*/- 6 dB Position)
Maximum Boost & Cut Gain: (WideBand
Gain)
*/- 12 dB (+/- 12 dB Position)
+/- 12 dB (+/- 6 dB Position)
Subsonic Low Cut Filter:
18 dB per octave
Frequency:
40 Hz

Date: Sept. 1989
MODEL MIDI Implementation Version: 1.01
Basic Default
Channel Channel
Default f memorized
Messages Omni on/off
Altered
Note
Number True Voice
Velocity Note ON
Note OFF
After Key's
Touch Ch's
Programmable
0 Volume EQ Vol., Bands 1-28
1 Band 1 (32Hz) Programmable as a block
" Subsonic, EQ Range
i Individually Programmable
28 Band 28 (16kHz)
Control
Change 64 Subsonic Filter on/off Controller value
0 to 63; off 64 to 127; on
Prog
Change True #
System Exclusive
System ; Song Pos
; Song Sel
Common : Tune
System : Clock
Real Time : Commands
Aux : Local ON/OFF
Messages .: All Notes Off
: Active Sense
Mode 1: OMNI ON, POLY Mode 2: OMNI ON, MONO O: Yes
Mode 3: OMNI OFF, POLY Mode 4: OMNI OFF, MONO X: No

LIMITED WARRANTY
Peavey
Electronics
Corporation
warrants
to
the
original
purchaser
of
this
new
Architectural
Acoustics"
product
that
itis
free
from
defects
in
material
and
workmanship.
If
within
one
(1)
year
from
date
of
purchase
a
properly
installed
product
proves
to
be
defective
and
Peavey
is
notified,
Peavey
will
repair
or
replace
it
at
no
charge.
(Note:
Batteries
and
patch
cords
not
covered.)
"Original
purchaser"
means
the
customer
for
whom
the
product
is
originally
installed.
Damage
resulting
from
improper
installation,
interconnection
of
a
unit
or
system
of
another
manufacturer,
accident
or
unreasonable
use,
neglect
or
any
other
cause
not
arising
from
defects
in
material
and
workmanship
is
not
covered
by
this
warranty.
The
warranty
is
valid
only
as
to
products
purchased
and
installed
in
the
United
States.
THIS
LIMITED
WARRANTY
IS
IN
LIEU
OF
ANY
AND
ALL
WARRANTIES,
EXPRESS
OR
IMPLIED,
INCLUDING
THE
IMPLIED
WARRANTIES
OF
MERCHANTABILITY
AND
FITNESS
FOR
A
PARTICULAR
USE.
UNDER
NO
CIRCUMSTANCES
WILL
PEAVEY
BE
LIABLE
FOR
ANY
LOST
PROFITS,
LOST
SAVINGS,
INCIDENTAL
DAMAGES
OR
CONSEQUENTIAL
DAMAGES
ARISING
OUT
OF
THE
USE
OR
INABILITY
TO
USE
THE
PRODUCT,
EVEN
IF
PEAVEY
HAS
BEEN
ADVISED
OF
THE
POSSIBILITY
OF
SUCH
DAMAGE.
THIS
LIMITED
WARRANTY
IS
THE
ONLY
EXPRESS
WARRANTY
ON
THIS
PRODUCT,
AND
NO
OTHER
STATEMENT,
REPRESENTATION,
WARRANTY
OR
AGREEMENT
BY
ANY
PERSON
SHALL
BE
VALID
OR
BINDING
UPON
PEAVEY.
Peavey's
liability
to
the
original
purchaser
for
damages
for
any
cause
whatsoever
and
regardless
of
the
form
of
action,
is
limited
to
the
actual
damages
up
to
the
greater
of
Five
Hundred
Doliars
($500)
or
an
amount
equal
to
the
purchase
price
of
the
product
that
caused
the
damage
or
that
is
the
subject
of
or
is
directly
related
to
the
cause
of
action.
This
limitation
of
liability
will
not
apply
to
claims
for
personal
injury
or
damage
to
real
property
or
tangible
personal
property
allegedly
caused
by
Peavey's
negligence.
For
information
on
service
under
this
warranty,
call
a
Peavey
customer
service
representative
at
(601)
483-5376.
DANGER
EXPOSURE
TO
EXTREMELY
HIGH
NCISE
LEVELS
MAY
CAUSE
A
PERMANENT
HEARING
LOSS
INDIVIDUALS
VARY
CONSIDERABLY
IN
SUSCEPTIB-LITY
TO
NOISF
INDUCED
HEARING
LOSS.
BUT
NEARLY
EVERYONE WILL | OSE SOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE FOR A SUFFICIENT TIME
THE
US
GOVERNMENT'S
OCCUPATIONAL
SAFETY
AND
HEALTH
ADMINISTRATION
iOSHA;
HAS
SPECIFIED
THE
FOLLOWING
PERMISSIBLE
NOISE
LEVEL
EXPOSURES
DURATION
PER
DAY
IM
HOURS
SOUND
LEVEL
dBA,
SLOW
RESPONSE
90
92
95
97
100
10?
à 105
- 10
«OF BSS 115
ACCORDING
TO
OSHA.
ANY
EXPOSURE
IN
EXCESS
OF
THE
ABOVE
PERMISSIBLE
LIMITS
COULD
RESULT
IN
SOME
HEARING
.OSS
ZAR
PLUGS
OR
PROTECTORS
IN
THE
EAR
CANALS
OR
OVER
THE
EARS
MUST
BE
WORN
WHEN
OPERATING
THIS
AMPLIFICATION
SYSTEM
IN
ORDER
TO
PREVENT
A
PFRMANENT
HEARING
LOSS
IF
EXPOSURE
IS
IN
EXCESS
OF
THE
LIMITS
AS
SET
FORTH
ABOVE
TO
INSURE
AGAINST
POTENTIALLY
DANGEROUS
EXPOSURE
TO
HIGH
SOUND
PRESSURE
LEVELS
IT
13
RECOMMENDED
THAT
ALL
,
PRODUCING
HIGR-SOUND
PRESSUBELEVELS
SUGH
AS
CUS.
AM
PFRSONSE
IN OPERATE
IPMENT
CAPABLE.
BLJEICATIQN
SY
STEM
BE
PR
HEARING
PRO;
ORS
WHILE
ITIS
NS MEDIE
E NEVERS
damp rag yl
covering used on some units can be cleaned with a damp
Read all Shy aad Operating i*Stfuctions betore using
th s product
c waty to a power supp y y
Lot adjacent to the power Supply cord.
All safety and operating instructions Should be retained
for f_ture reference
Obey all cautio^s in tne operating instructions and on the
back of the unit
Ali operating instructions should be followed
This procuct should no: be used near water ie à
bathtub sink, sw mming puol. wet basement, etc
his product should be located so thal its position does
not interfere w th its proper ventilation, It should not be
placed flat agains! a wall or placed in a built-in enclosure
that w II impede the flow of cooling air
7 This product should not be placed near a suu rce of heat
such aS a stove. radiator or another heat producing
amplifier
. Never break off the ground pin on the power supply cord
For more information on grounding write for our free
booklet "Shocx Hazard and Grounding.’
Powe’ supply cords should always be handied carefully
Never walk or place equipment o- power supply cords
Perodically check cards fo- cuts or signs cf stress
especially a: the plug and me point where the cord exits
the unit
The power supply cord soouid 5e unplugged when tne
unitis 10 be unused (or long penods of tire
If thus productis *o be mounted in an equipment race. rear
Support should be provided
ATEAMMEXY.
ARCHITECTURAL
RKCOows: T Fes 2
Features and specifications are subject to change
rag. or an ammonia based household clearer if
necessary
Care should be taken so that objects do not tall and
liquids are not spilled into the unit through the ventilatior
holes or any other openings
This unit shouid be checked by a qualified service
technician if
A. The power supply cord or p ug has been damaged
B. Anything has fallen or beer spilled into the unit
C The unit does nol operate correctly
D Theunithas beer dropped or tne enclosure damaged
The user should not to attempt to service this equipment
All service work should be done by 8 quatified service
technician
A
DIVISION
OF
PEAVEY
ELECTRONICS
CORPORATION
711
A
Street,
P.O.
Box
2898,
Meridian,
MS
39302-2898
360301184
©1989
Printed
in
U.S.A.