L-Acoustics LA2Xi, Owner'S Manual

Page: 12 / 38

Technical description
Power supply and amplier section
The Class D amplication circuits ensure the LA2Xi energy efciency for minimal heat dissipation. LA2Xi delivers (no
limiter 200 ms, sine burst < 1% THD, 1 kHz):
• 4 × 640 W at 4 Ω
• 4 × 360 W at 8 Ω
• 4 × 190 W at 16 Ω
LA2Xi is a green amplied controller that relies on a universal Switched Mode Power Supply (SMPS) suitable for mains
100 V AC - 240 V AC (± 10%, 50 Hz - 60 Hz ). The SMPS features a PFC (Power Factor Correction) which maximizes
the amplier efciency and takes advantage of nearly 100% of the electrical power available with a very high tolerance
to unstable mains. This represents a reduction of the electrical power requirements (cable gauge, power conditioning,
etc.) for substantial savings.
Speaker outputs
LA2Xi features two female 4-point terminal blocks for loudspeaker outputs.
The terminal blocks can be used in a single-ended (SE) conguration, a bridge-tied load (BTL) conguration, or a parallel
bridge-tied load (PBTL) conguration. Bridging the connectors improves maximum SPL, but reduces the maximum number
of loudspeaker enclosure per output and per amplied controller (refer to the Preset guide or the Amplication
reference technical bulletin for more information on enclosure drive capacity).
Maximum SPL
Peak level measured at 1 m, under free eld conditions for full range loudspeakers and half space conditions for
subwoofers, using pink noise with crest factor 4 (preset specied in brackets).
LA2Xi
SE BTL PBTL
LA4X LA8 LA12X
X4i ([X4])
116 dB — — 116 dB
5XT ([5XT]) 121 dB — — 121 dB
X8 ([X8])
125 dB 129 dB — 129 dB
X12 ([X12]) 131 dB 136 dB — 136 dB
X15 HiQ ([X15])
133 dB — — 138 dB
Syva ([SYVA]) 130 dB 137 dB — 137 dB
ARCS Wide ([ARCS_WIFO])
131 dB 137 dB — 137 dB
ARCS Focus ([ARCS_WIFO]) 133 dB 139 dB — 139 dB
A10(i) Wide ([A10])
133 dB 137 dB — 137 dB
A10(i) Focus ([A10]) 136 dB 140 dB — 140 dB
A15(i) Wide ([A15])
136 dB 141 dB — 141 dB
A15(i) Focus ([A15]) 139 dB 144 dB — 144 dB
Kara II ([KARA II 70])
137 dB — — 142 dB
Kara(i) ([KARA]) 136 dB — — 141 dB
Kiva II ([KIVA II])
133 dB 138 dB — 138 dB
KS28 ([KS28_100]) 136 dB — 143 dB — — 143 dB
SB28 ([SB28_100])
136 dB — 142 dB — 142 dB
KS21(i) ([KS21_100]) 131 dB 138 dB — 138 dB
SB18(i) ([SB18_100])
133 dB 138 dB — 138 dB
SB15m ([SB15_100]) 131 dB 137 dB — 137 dB
12 LA2Xi owner's manual (EN) version 1.0