CONTENTS
IMPORTANT SAFETY INSTRUCTIONS .................................................................................................2
INTRODUCTION ........................................................................................................................................3
REAR PANEL DESCRIPTION .................................................................................................................... 4
HOOKUP DIAGRAM ..................................................................................................................................5
CONNECTIONS ..........................................................................................................................................5
PLACEMENT ................................................................................................................................................5
Room Acoustics ..................................................................................................................................................................6
THERMAL CONSIDERATIONS ............................................................................................................... 6
AC POWER .................................................................................................................................................. 6
SERVICE INFORMATION ..........................................................................................................................7
Troubleshooting ..................................................................................................................................................................7
Repair ....................................................................................................................................................................................8
CARE AND MAINTENANCE ....................................................................................................................8
SR1521z SPECIFICATIONS ........................................................................................................................ 9
SR1521z LIMITED WARRANTY ...............................................................................................................11
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for more information about this and other Mackie products.
INTRODUCTION
mammoth aluminum heatsink that eliminates the need
for fans. A tremendous benefit of having the ampli-
fiers located within the loudspeaker cabinet is that the
SR151z functions as a system, optimizing acoustic,
electronic, and mechanical designs to achieve the high-
est level of performance and value.
The rear mounted amplifier assembly features
separate signal and AC power panels separated by the
heatsink. The signal input panel contains:
• an input XLR and loop-through XLR
• a volume level control
• Power ON indicator
• Signal Present indicator
• Limit indicator
• Thermal Protection indicator
The cabinet is constructed using both 18 mm Baltic
birch plywood and pressure injected structural resin.
A carrying handle is integrated into each side for easy
loading and transport.
Thank you for choosing Mackie’s active sound reinforce-
ment loudspeaker systems.
The SR151z is a high-efficiency, high output, horn-
loaded, -way, wide-dispersion, active sound reinforce-
ment system. The SR151z benefits from the integration
of 500 watts of amplifier power, complete active control
electronics, and precision transducer components.
These elements together form a speaker system with
unprecedented output, resolution, and clarity.
The 1.75-inch neodymium high-frequency compres-
sion driver features a low-distortion optimized symmet-
ric phase plug.
The low frequencies are produced by a high-output
15-inch woofer featuring a .5-inch high-temperature
voice coil.
Connecting and setting up the SR151z is a breeze. It
accepts a line-level signal via a female XLR input jack.
A male XLR Thru jack is provided for daisy-chaining the
signal to additional SR151z cabinets.
Two built-in power amplifiers provide 100 watts rms
for the high-frequency driver and 00 watts rms for the
low-frequency driver. The amplifier modules sit on a
Part No. 001856 Rev. B 01/08
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