6
– VRM12
VRM12 –
7
• Using the Pin 2+,2- Speakon connections to connect the second power amplifier
channel to a subwoofer.
• Using the Pin 2+,2- Speakon connections to connect the second power amplifier
channel to a second VRM12. You will need a cross-wired cable which has Pins 2 at
one end connected to Pins 1 at the other.
Loudspeaker Cables
• Use loudspeaker cables with a minimum conductor size for the length you need,
as listed in these tables. This will minimize
power losses to less than 0.5 dB. The
cable lengths listed are “up to” lengths.
For in-between lengths, use the next larger
conductor gauge. Using larger than the
recommended conductor size is always
permissible. Using smaller than recommended
conductor size will result in higher power
losses.
• The recommended conductor gauges are
listed for AWG (American Wire Gauge) and
Metric WG (Metric Wire Gauge). Note that
smaller AWG numbers = larger conductors
and smaller Metric WG numbers = smaller
conductors. The Metric WG is equal to ten
times the nominal conductor diameter in
millimeters.
• For cable lengths over 200 feet / 60 m at 8 ohms, and over 100 feet / 30 m at 4 ohms,
the conductor sizes needed for less than 0.5 dB power losses are rarely practical
for physical and cost reasons. As a practical compromise for these situations the
recommended conductor gauge is 10 AWG or 25 metric.
Minimum AWG 4 ohm 8 ohm
18
10 ft
25 ft
16
25
50
14
25
75
12
50
125
10
100
200
Min Metric WG 4 ohm 8 ohm
12
3 m
8 m
14
8
15
16
8
25
20
15
40
25
30
60
xover
VRM12 enclosure
Pin
Speakon
Speakon
Pin
1+
1-
2+
2-
1+
+
+
+
1-
2+
2-
xover
VRM12 enclosure
Pin
Speakon
Speakon
Pin
1+
1-
2+
2-
1+
+
+
+
1-
2+
2-
Amp A+
B+
xover
VRM12 enclosure
Pin
Speakon
Speakon
Pin
1+
1-
2+
2-
1+
+
+
+
1-
2+
2-
Sub
Amp A+
B+
4-conductor cable
4-conductor cable
cross-wired cable
Lead Guitar
(for example)
Bass Guitar
(for example)
+
