Viola Systems FORTE MONO Owner's Manual page 8

that can deliver 75W per channel into 8 ohms, into a mono power amplifier that can
deliver 300W into 8 ohms. This works by feeding the input signal into one unit whilst
feeding an anti-phase version of the same signal to the input of the other unit. The
speaker is connected between the High (H) terminals of the two units.
terminals of the two units must also be linked.
Producing the anti-phase signal for the second unit is easy. As the input connectors
of each unit are wired in parallel, this simply involves connecting a cable from the
unused input connector of the first unit to either input of the second unit. The anti-
phase signal is produced by wiring this cable so that the connection between pins 2
and 3 on either connector on this cable are swapped over. Suitable cables may be
obtained from your VIOLA dealer, or directly from VIOLA.
To connect two Forte units in bridge mode follow the instructions below:
1. Connect the signal source to the upper XLR input connector of the first Forte.
2. Connect the bridge cable between the lower XLR input connector of the first Forte
and the upper XLR input of the second Forte.
3. Connect red (H) binding post on the rear of the first Forte to the input terminal
marked + , or colored red on the speaker.
4. Connect the red (H) binding post on the rear of the second Forte to the input
terminal marked -, or colored black on the speaker.
5. Link the black (L) binding posts on the rear of the units together.
These connections are shown in figure 3 below. The units are shown stacked for
convenience of illustration.
Figure 3. Bridge mode connection.
Speaker
-
+
Viola Forte Manual Rev 2
We do not recommend stacking the units in practice.
Forte
1
0
Forte
1
0
Page 8 of 15
The Low (L)
Bridging Cable
Input
H OUTPUT
L
INPUTS
H OUTPUT
L
INPUTS
th
7 September 2005