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user manual
NuQ series
NuQ manual
page 17
total impedance of 4 ohms. Never connect loudspeakers whose total combined
impedance is lower than the amplifier’s recommended minimum load impedance. Do not
use the loop-out connection to connect other types of loudspeaker, especially when their
impedance is not known, as permanent damage could result!
Please take care if XLRs, binding posts, or other dual connector systems, are used at the
amplifier end of the loudspeaker cables (jack plugs/sockets should not be used) where
there is a possibility of the cables being reversed. It is highly recommended that Neutrik
Speakon or other heavy duty non-reversible connectors are used.
Cable Recommendations
Heavy duty loudspeaker cable should always be used, with a minimum wire size of 12
gauge (1.5mm²), and preferably 10 gauge (2.5mm²) for longer runs, keeping the run as
short as possible. This helps to avoid wasting amplifier power in the resistance of the
cable. High cable resistance also lowers the damping factor of the amplifier which affects
its ability to control loudspeaker cone movement.
Losses due to undersized cable and long runs are clearly illustrated in the table below.
Please use this table to determine the most suitable cable size and maximum run for your
particular application.
8W 4W 8W 4W
5 0.07 0.8 1.6 -0.1 -0.1
10 0.13 1.6 3.2 -0.1 -0.3
25 0.33 4.0 7.7 -0.4 -0.7
50 0.67 7.7 14.3 -0.7 -1.3
100 1.33 14.3 25.0 -1.3 -2.5
5 0.04 0.5 1.0 0.0 -0.1
10 0.08 1.0 2.0 -0.1 -0.2
25 0.20 2.4 4.8 -0.2 -0.4
50 0.40 4.8 9.1 -0.4 -0.8
100 0.80 9.1 16.6 -0.8 -1.6
5 0.02 0.3 0.6 0.0 -0.1
10 0.05 0.6 1.2 -0.1 -0.1
25 0.12 1.5 3.0 -0.1 -0.3
50 0.25 3.0 5.8 -0.3 -0.5
100 0.50 5.8 11.0 -0.5 -1.0
note : Figures based on specifications supplied by Van Damme Cables (VDC
)
1.5
2.5
4.0
Voltage Drop (%) 8 ohms Sensitivity Loss (dB)Nominal Cable
Area (mm
2
)
Cable Length
(m)
Cable Resistance
(W)