DPI SERIES USER MANUAL
7
The DPI series amplifiers have an open input architecture
for future expansion. Standard, the amplifier is equipped with
the PIM-SIM module.
5.3.2 PIM-SIM1 module
. Channel input sockets are mixed XLR/phone jack recepta-
cles, which allow the use of microphone or instrument cables
to connect the amplifier. Whenever possible, use 2-conductor
shielded cable for a balanced signal transmission. This gives
the best results and the lowest noise. The inputs are wired in
standard configuration with pin 1 as ground, pin 2 as signal
“hot” and pin 3 as signal “cold”.
Refer to the input wiring diagram on the amplifier’s back
panel.
Each input XLR/Phone jack is parallel wired to a Phoenix
screw terminal for easy connections as well as to a ‘Direct Out’
male XLR socket to provide easy linking to other amplifiers.
2. Channel 2 input. See Ch information under point .
All input and output sockets are on the rear panel of the
amplifier. The rear panel also holds the mains cord (8) and the
fuse holder (9). For maximum safety, it is recommended to stick
to the order given below when wiring the PA system.
5.3 Connections
5.3.1 Input connections
3. Configuration dipswitches for parallel mode and high pass
filter.
Switches 1 and 2 make it possible to parallel CH1 and CH2
inputs. Put switches in the ON (down) position to wire CH1 and
CH2 inputs in parallel. Use CH1 or CH2 input. The output lev
-
els can be adjusted individually by means of the corresponding
level controls.
Switch 3 makes it possible to insert a 50Hz second order high
pass filter into CH1 signal path. Put the switch in the ON (down)
position to activate the filter.
Switch 4 controls CH1 high pass filter frequency. With the
switch in the up position the cutoff frequency is 50Hz. The down
position changes this to 30Hz.
Switch 5 controls CH2 high pass filter mode and switch 6
controls CH2 high pass filter cutoff frequency. Functioning is
the same as for CH1.
Warning: All DPI series amplifiers are capable of producing
dangerously high voltages at the output terminals! To avoid
cable overheating, do not use speaker cables under .5 mm2
cross-section (AWG 5). The use of thicker cables helps to keep
power loss down and damping high, especially if long distances
have to be bridged. After insertion, twist each speakon connector
clockwise until latching or lock it with the swivell nut to ensure
proper contact.
DUAL
mode: use the SPEAKER OUT and 2 outputs to con-
nect the speaker systems. Minimum total speaker impedance
per channel is 2 O hms.
BRIDGE
mode: BRIDGED OUT speaker connection is done
by using standard Speakon cables. Minimum total speaker
impedance is 4 Ohms.
5.3.3 Speaker connections
EFL® (Extended Feedback Loop).
This inovating feature makes it possible to take the feed-
back for the amplifier right from the loudspeaker terminals, of
-
fering unprecedented control of the loudspeaker, independent
on loudspeaker cable length. The amplifier can be used as a
conventional amplifier without this feature enabled, without any
inconveniences by simply not connecting the sense terminals. In
this case feedback is taken right at the speaker output terminals,
compensating any internal wiring, yielding very high low output
impedance.
The sense inputs give access to highly sensitive
electronic components inside the unit.
Although the amplifier is protected against mis
-
wiring of the sense inputs, these components
are not resistant to continuous fault situations.
+
CH1
INPUT
INPUT
LINK / OUT
+
CH2
INPUT
LINK / OUT
GND
1
2
3
SLEEVE
TIP
RING
GND
+
-
PA
RA
LL
EL
IN
PU
TS
CH
1H
P
FI
LT
ER
(O
N/
OF
F)
CH
2H
P
FI
LT
ER
(O
N/
OF
F)
CH
1H
P
FR
EQ
.5
0H
z
30
Hz
INPUT
1
2 3
ON
CONFIGURATION
INPUT IMPEDANCE: 20K BALANCED
10K UNBALANCED
M
OD
UL
E:
SI
M
-1
1 2 3 4 5 6
CH
2H
P
FR
EQ
.5
0H
z
30
Hz
1
3
2
OUT + OUT
SENSE
+
CH1
OUT + OUT
SENSE
+
CH2
W
AR
NI
NG
:
RI
SK
OF
HA
ZA
RD
OU
S
EN
ER
GY
!
MA
KE
PR
OP
ER
SP
EA
KE
R
CO
NN
EC
TIO
NS
-S
EE
OP
ER
AT
IN
G
MA
NU
AL
BE
FO
RE
US
E.
LOCK
LOCK
LOCK
1+
1
2+
2
OUT
SENSE +
SENSE
OUT +
SPEAKON
WIRING
BRIDGE
Pin configurations
The pin configurations for the three speaker connectors
are printed on the amplifier’s back panel. Before connecting
the speakers, make sure that your speaker cables are properly
wired.
Warning: this mode does not mean that the out-
puts of both channels can be wired in parallel.
Never attempt to wire them together! This can
damage the amplifier.
!
!
