Mackie FUSSION 1800SA User Manual

Fussion Series Active, High-Output Subwoofer
FUSSION 1800SA/1800S
SUBWOOFER
FUSSION 1800SA/1800S
■ Mackie's FUSSION 1800SA/1800S is a high-out-
put, active subwoofer system featuring high-precision
18-inch transducers combined with application-spe-
cific amplifier technology. The system is composed of
two subwoofer cabinets: 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.
■ 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 car-
bon fiber, which is impregnated into the cone.
Extensive materials science research and develop-
ment has led to significant advancements in adhe-
sives, voice coil former materials, surround and spi-
der technologies. FUSSION 1800SA/1800S transduc-
ers were specifically designed for use in this type of
enclosure design. The magnetic assemblies used
incorporate advancements in coil venting and struc-
tural cooling that provide lower temperature rise and
substantially improved power compression character-
istics.
■ The Fussion 1800 system amplifier module, locat-
ed in the 1800SA cabinet, is an excellent example of
the efficiency that is possible with active designs.
This module uses two high-efficiency, high-current,
CLASS G topology amplifiers 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 proces-
sor.
■ FUSSION 1800SA/1800S subwoofer system fre-
quency response is linear between 38Hz and 150Hz.
When used with any FUSSION full range or mid-high
speaker system, the onboard processor provides com-
plete system management of all electronic and
acoustic functions including electronic active
crossover, electronic phase alignment, electronic time
correction, electronic equalization and complete
amplifier and component protection.
■ To ensure long-term reliability and performance,
the amplifier cards and processor are mounted to a
Features
■ Active, high-output dual 18" subwoofer system
■ 2500W high-efficiency, high-current amplifier
■ High output, 139dB peak
■ Two 18" high-precision transducers
■ 4" high-temperature, inside/outside voice coils
■ 18mm birch plywood construction
■ Fully integrates with onboard acoustic man-
agement control system found in all Fussion
full-range or mid-high speaker systems
■ Individual 18" cabinets facilitate transport
and set-up
huge heat sink eliminating the need for fans, dra-
matically extending life expectancy and eliminat-
ing maintenance cycles. An easily-accessible rear
input and control panel offers substantial signal-
routing flexibility. Line-level signal connections
are via XLR connectors. There is a main speaker-
level output on the 1800SA rear panel, which pro-
vides signal to the passive 1800S cabinet via an
EP-type connector. The system features soft-start
circuitry that eliminates pops and precisely con-
trols AC inrush current surges.
■ Fussion 1800S and 1800SA cabinets are con-
structed using 18mm thick multi-layered birch
plywood and finished in black splatter paint.
There are two handles on each side for efficient
loading and transport.
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Mackie FUSSION 1800SA Specifications

General

Output Connectors	XLR
Width	22.5 inches
Woofer Size	18 inch
Crossover Frequency	120Hz
Input Connectors	XLR
Type	Active

Summary

Fussion Series Overview

Fussion 1800SA/1800S System Description

High-output active subwoofer system with 18-inch transducers and application-specific amplifier technology.

Transducer Technology

Features 4-inch Inside/Outside-wound voice coils, long-strand carbon fiber cone assembly, and advanced magnetic assemblies.

Amplifier Module Design

High-efficiency, high-current CLASS G topology amplifiers in bridged mode produce 2500 watts of power.

System Integration and Processing

Relies on external processing for system management, including crossover, phase alignment, and equalization.

Reliability and Cooling

Amplifier cards and processor mounted to a huge heat sink for extended life and reduced maintenance.

Active Subwoofer Specifications

System Performance Specifications

Frequency Range (38Hz-160Hz), Response (-3dB) (40Hz-150Hz), SPL (136dB/139dB), Crossover Point (85Hz).

Transducer Details

18-inch low-frequency transducer with 4-inch voice coil, 8 ohm impedance, 800W RMS power handling.

Amplifier Output

Low frequency amplifier delivers 1250W continuous @ 4 ohm and 2500W peak @ 4 ohm.

Audio Connectivity

Main Input (2 ohm, 4 volts balanced), Speaker Level Output (EP4 female), Speaker Level Input (EP4 male).

Line Input Power Requirements

120VAC/60Hz (US) or 230VAC/50Hz (Europe) with specific AC connectors and amperage recommendations.

Safety and Protection Features

RMS limiting, thermal monitoring, and transistor-based in-rush current protection.

System Diagrams and Measurements

Frequency Response and Distortion

Graph illustrating frequency response and 2nd/3rd harmonic distortion measurements.

Physical Dimensions and Views

Diagrams showing front, side, top, and back views with detailed dimensions.

Euro and US Power Versions

Illustrations of the rear panel for both the Euro 230V and US 115V versions.

Architectural and Engineering Specifications

System Design Requirements

Specifies two 18-inch LF transducers per enclosure, multi-ply wood construction, and ±3 dB frequency response.

Amplifier and Enclosure Features

Details amplifier power, heat sink suspension, enclosure handles, XLR/EP-type connectors, and grille.

System Identification

The active subwoofer system shall be the Mackie Designs FUSSION 1800SA/1800S.

Connection Examples

Diagrams illustrating system connections involving FUSSION 3000, 1800SA, 1800S, and a mixer.