Figure 3: Connecting two 115XT HiQ in parallel to an LA4 amplified controller
To ensure both high performance and safety, L-ACOUSTICS recommends the exclusive use of high-
quality, fully insulated speaker cables made of stranded copper wire.
In order to preserve a high damping factor it is desirable to keep loudspeaker cables as short as
possible and with a gauge offering low resistance per unit length.
The following table provides information regarding the recommended wire cross-section versus length. Two cases are
possible depending on the impedance load value connected to the LA4 (8 ohms for a single 115XT HiQ enclosure, 4
ohms for two 115XT HiQ enclosures in parallel):
Table 1: Minimum wire cross-section versus length for Damping Factor > 20
Cross-section Length for one 115XT HiQ / 8 ohms Length for two 115XT HiQ / 4 ohms
mm
2
SWG AWG m ft m ft
2.5 15 13 30 100 15 50
4 13 11 50 160 25 80
6 11 9 74 240 37 120
10 9 7 120 390 60 195
According to the calculation in Table 1
one SP25 cable (4mm², 25m) can be used to power
two 115XT HiQ in parallel
(4ohm load) with a damping factor still greater than 20.
!
IMP
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