Specifications

4 Acoustical safety

Minimum audience/staff distance

Please be aware that the ASX ultra high performance active subwoofer has been designed

for use in large scale installations. The ASX is capable of producing a sound pressure level

of 152dB at 1m from its grille when driven to full power.

Sound pressure in excess of 140dB spl – however short the exposure time - may cause

permanent hearing damage. A minimum listener distance of 4m

for audience or staff is

strongly recommended.

Maximum pk spl limiters

Where a minimum listener distance of at least 4m is not feasible, we recommend limiting the

maximum peak sound pressure level by loading an ASX preset with the appropriate peak

limiter reduction.

System limiters should be set by an experienced sound system engineer.

Preset pk limiter reduction Maximum spl at 1m Safe listening distance for

single peak

0dB (as shipped) 152dB peak spl 4m

-6dB presets 146dB peak spl 2m

-12db presets 140dB peak spl 1m

Note that the minimum listening distances quoted in this section are to protect the listener

from single instances of maximum peak output only.

If in doubt, please email info@martin-audio.com

for further advice.