AudioControl EQX Manuel Du Propriétaire
Concert Series Owner’s Manual
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Amplifier Bridging
The EQX comes with LOW PASS MONO Out-
puts, so you can create a bridged amplifier
system that will drive a subwoofer at maximum
power output, as shown in Figure 6.
puts, so you can create a bridged amplifier
system that will drive a subwoofer at maximum
power output, as shown in Figure 6.
This concept will work on almost any amplifier
not already equipped with bridging outputs (i.e.,
an amplifier without common speaker output
grounds). Check your amplifier owner's manual
to verify that it meets these conditions.
not already equipped with bridging outputs (i.e.,
an amplifier without common speaker output
grounds). Check your amplifier owner's manual
to verify that it meets these conditions.
In the bridged mode, each channel of the ampli-
fier sees half of the load impedance (i.e., 2 ohms
versus 4 ohms). It outputs one channel in phase
with the system and the other 180 degrees out
of phase. In other words, one channel supplies
the positive half of the signal and the other the
negative side. The voltages are summed at the
subwoofer for a fourfold increase in power, as
demonstrated by the following calculations:
fier sees half of the load impedance (i.e., 2 ohms
versus 4 ohms). It outputs one channel in phase
with the system and the other 180 degrees out
of phase. In other words, one channel supplies
the positive half of the signal and the other the
negative side. The voltages are summed at the
subwoofer for a fourfold increase in power, as
demonstrated by the following calculations:
The formula for output power of an amplifier
(single channel) is:
(single channel) is:
(Peak Voltage x .707)
2
Load impedance (ohms)
For a normal amplifier (rated at 25 watts per
channel) driving a nominal 4 ohm load, the
output power is:
channel) driving a nominal 4 ohm load, the
output power is:
(14 x .707)
2
4
For a bridged amplifier (rated at 25 watts per
channel) driving a nominal 4 ohm load, the
voltage is doubled and the output power is
quadrupled:
channel) driving a nominal 4 ohm load, the
voltage is doubled and the output power is
quadrupled:
(28 x .707)
2
4
As this example illustrates, a 25 watt amplifier
can provide 100 watts of power in the bridged
mode, for a noticeable increase in bass sound.
can provide 100 watts of power in the bridged
mode, for a noticeable increase in bass sound.
= Output Power (watts)
= 24.49 watts
= 97.97 watts
16