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Overview
The SRS1500 is a high output active subwoofer system. It features a high-precision 15"
transducer combined with application specific amplifier technology. The system is
composed of a single, compact subwoofer cabinet with built-in control and amplifier
electronics.
The SRS1500 accepts a stereo line-level signal via female XLR input jacks. Male XLR Thru
jacks are provided for daisy-chaining the signal to additional SRS1500 cabinets. The built-
in crossover separates the low frequencies from the high frequencies, and routes the high
frequencies to the male XLR high-pass output jacks. Connect these to the inputs of full-
range active speakers such as the Mackie Designs SRM450s, or to an amplifier powering a
pair of passive speakers such as the Mackie Designs M•1400i and C300s. A Phase switch
gives you the option of reversing the phase to the full-range speakers by 180º. A
Subwoofer Level control allows you to adjust the balance between the subwoofer and
the full-range speakers.
The built-in amplifier produces up to 600 watts of power. The amplifier module sits on a
large heatsink that eliminates the need for fans, dramatically extending life expectancy,
and eliminating maintenance cycles. A tremendous benefit of having the amplifier
located within the subwoofer cabinet is the speed with which power is delivered to the
woofer.
The cabinet is constructed with 18mm thick multi-layered birch plywood. Carrying
handles are integrated into each side for easy loading and transport.
POWER Switch
Use this switch to turn the SRS1500 on and off. Make sure the signal source's level control
is turned down before you turn it on.
AC Receptacle
This is where you connect the AC linecord to provide AC power to the SRS1500's built-in
power amplifiers. Plug the linecord into an AC socket properly configured for your
particular model.
THERMAL Indicator
The SRS1500 has a thermal protection circuit that monitors the internal temperature of the
amplifier and heatsink. If the temperature should exceed a safe operating level, the
signal is muted and the THERMAL indicator lights. When the temperature cools to a safe
level once again, the thermal protection circuit deactivates and normal operation
continues.
Note: Activation of the thermal protection circuit is an indication that you must take
steps to avoid continued thermal problems.
POWER Indicator
When the POWER switch is turned on and the linecord is connected to an active AC
power supply, this indicator lights green. The blue LED on the front of the cabinet works
in the same way.
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