Getting Started
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ABOUT THE LX POWER AMPLIFIERS
Thank you for purchasing an LX Power Amplifier, a reference-qual-
ity amplifier designed to meet the highest standards of power and
performance under even the most extreme operating conditions.
Equipped with advanced thermal, DC, and speaker protection, the
LX amplifiers deliver reliable and exceptional performance with
most loudspeakers, including mismatched, reactive, and unusual
loads. In addition, the LX amplifiers include protection against
short circuits, component failures, miswiring, and internal faults.
Available in five or seven channel versions, the LX amplifiers
deliver high-power performance. Each 200-Watt channel includes
four custom-designed, hand-graded output transistors as well as a
160-volt power supply for extra headroom. Bridgeable architecture
allows the first four 200-Watt channels to be configured with up to
two 400-Watt channels for even higher-power output. Non-
bridged channels are compatible with speaker impedances of 2
Ω
and above, and bridged channels are compatible with speaker
impedances of 4
Ω
and above.
Complemented by the heavy-duty, gold-plated speaker output
connectors, the rear panel includes selectable balanced or unbal-
anced audio input on RCA and XLR or 1/4-inch Tip/Ring/Sleeve
connectors. A trigger input connector allows the LX amplifiers to
be controlled with associated components such as the MC-12 or
MC-8 Digital Controller. In addition, a ground lift switch can be
used to eliminate audible hum caused from multiple grounding
paths.
The LX amplifiers feature a Junction Temperature Simulation (JTS)
computer that predicts the internal temperature of each output
transistor to prevent overheating. Unlike similar technologies, JTS
combines the output voltage and current of each output transistor
with heatsink temperatures to arrive at an accurate internal tem-
perature prediction. As a result, JTS prevents overheating even
when heatsink temperatures are relatively cool, allowing the LX
amplifiers to achieve maximum performance and reliability from
the output transistors.
In addition to JTS, the LX amplifiers include advanced thermal and
DC protection for each channel. Thermal protection automatically
deactivates channels exceeding 115°C, while DC protection pre-
vents DC and frequencies below 10Hz from reaching the speakers.
Dedicated, multi-colored channel status LEDs are located on the
front panel to provide at-a-glance viewing of channel status at all
times.
With THX Ultra Certification, the LX amplifiers are certified to meet
the highest THX standards. Advanced thermal, DC, and speaker
protection further guarantee an exceptional performance under
even the most extreme operating conditions. Add to this incredible
power and wide-ranging flexibility, and the LX amplifiers are at
home in the most sophisticated and demanding home theaters.
