Madrigal Audio 23.5, Manual, Page: 9 / 16

9
Bridged operation
When greater power output is desired, the Nº23.5 may be bridged for
monophonic operation into load impedances of at least 2
Ω
.
Note: Make sure the loudspeaker is rated to handle extremely
high power levels. For example, a bridged Nº23.5 driving an 8
Ω
loudspeaker is capable of delivering 800W RMS.
For the best bridged performance, we recommend balanced
interconnection. If your preamplifier provides balanced output, follow
the steps below.
Balanced bridged
operation
PUSH PUSH
– +
Loudspeaker
+ –
Nº23.5
– +
From preamplifier
balanced main output
Balanced
bridging cable
Right
channel
Left
channel
Figure 9: Connections for
balanced bridged
operation
1. For balanced bridged operation, you'll need a special three-
ended cable. You may fabricate such a cable according to
Figure 10; it's also available through your Mark Levinson dealer as
part of a balanced bridging kit.
Note: If fabricating the cable, be sure to use high-quality
audio interconnect cable (such as Madrigal HPC).
Connect the bridging cable's female XLR-type connector to the
appropriate channel of your preamplifier's balanced main
output.