Mackie 1800s Specification Guide

FUSSION 1800SA/1800S

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  Mackie’s FUSSION 1800SA/1800S is a high-output, 

active subwoofer system featuring high-precision 18-inch 

transducers combined with application-specifi c amplifi er 

technology. The system is composed of two subwoofer cabi-

nets: the 1800SA, which contains a single 18-inch woofer 

and the active electronics, and the 1800S, a single 18-inch 

woofer cabinet that functions as a slave.

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  Transducers used in the FUSSION 1800SA/1800S system 

feature 4-inch, Inside/Outside-wound voice coils that offer 

extreme power-handling capabilities. The cone assembly is 

reinforced with long-strand carbon fi ber, which is impreg-

nated into the cone. Extensive materials science research 

and development has led to signifi cant advancements in 

adhesives, voice coil former materials, surround and spider 

technologies. FUSSION 1800SA/1800S transducers were 

specifi cally designed for use in this type of enclosure design. 

The magnetic assemblies used incorporate advancements 

in coil venting and structural cooling that provide lower tem-

perature rise and substantially improved power compression 

characteristics.

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  The Fussion 1800 system amplifi er module, located in 

the 1800SA cabinet, is an excellent example of the effi ciency 

that is possible with active designs. This module uses two 

high-effi ciency, high-current, CLASS G topology amplifi ers 

running in bridged mode to produce 2500 watts of power. 

Instead of an onboard control system, the system relies on 

external processing supplied by any FUSSION full range or 

mid-high speaker system or by a stand-alone processor.

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  FUSSION 1800SA/1800S subwoofer system frequency 

response is linear between 38Hz and 150Hz. When used 

with any FUSSION full range or mid-high speaker system, the 

onboard processor provides complete system management 

of all electronic and acoustic functions including electronic 

active crossover, electronic phase alignment, electronic time 

correction, electronic equalization and complete amplifi er 

and component protection.

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  To ensure long-term reliability and performance, the 

amplifi er cards and processor are mounted to a huge heat 

sink eliminating the need for fans, dramatically extending 

life expectancy and eliminating maintenance cycles. An eas-

ily-accessible rear input and control panel offers substantial 

signal-routing fl exibility. Line-level signal connections are 

via XLR connectors. There is a main speaker-level output on 

the 1800SA rear panel, which provides signal to the passive 

1800S cabinet via an EP-type connector. The system features 

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soft-start circuitry that eliminates pops and precisely controls 

AC inrush current surges.

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  Fussion 1800S and 1800SA cabinets are constructed 

using 18mm thick multi-layered birch plywood and fi nished 

in black splatter paint. There are two handles on each side 

for effi cient loading and transport.

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SUBWOOFER

FUSSION 1800SA/1800S