L-Acoustics X15 HiQ

A full-range top, 1 x 15 in LF + 1 x 3 in HF coaxial. The figures below have not yet been checked against the datasheet.

Unverified data. Entered from the manufacturer’s page. Check the datasheet before relying on it.

Place it in the planner

Specifications used

Maximum level	138 dB peak at 1 m
Coverage	40° horizontal × 60° vertical
Frequency range	55 Hz to 20000 Hz (Usable bandwidth at -10 dB; no tolerance printed.)
Weight	21 kg
Pole socket	Yes
Source	Manufacturer page (2026-10-10)

How the level was stated. Peak level at 1 m, free field, pink noise, crest factor 4, X15 preset.

Coverage definition. Nominal -6 dB. Specs section reads vertical 60 / horizontal 40; the overview on the same page reads H 60 / V 40 (contradiction). Values here follow the specs section and a retailer listing seen earlier (40 H x 60 V); confirm on datasheet.

Notes. Page calls it a 2-way active coaxial enclosure yet also says it is amplified by LA4X/LA8/LA12X, so active/passive left unrecorded. Two 35 mm pole sockets. No power rating printed. Dimensions printed without axis labels (430/580/375 mm), not recorded.

Coverage shape

Horizontal: 40° (seen from above)

Vertical: 60° (seen from the side)

What the figures mean at distance

Taking 138 dB at 1 m on axis and the free-field rule of 6 dB lost per doubling of distance, this is the most the speaker can reach and how wide and high its nominal coverage is at each distance. A real room adds reflections, and a speaker is not normally run at its maximum.

Distance	Level on axis	Coverage width	Coverage height
2 m	132.0 dB	1.5 m	2.3 m
5 m	124.0 dB	3.6 m	5.8 m
10 m	118.0 dB	7.3 m	11.5 m
15 m	114.5 dB	10.9 m	17.3 m
20 m	112.0 dB	14.6 m	23.1 m

See level and distance and coverage angles for how these are worked out.

Planning estimate only. The calculation ignores reverberation, reflections and room modes. See terms and disclaimer.