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  • Lexicon-GX-7-front
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Lexicon GX-7 7-Channel Power Amplifier

Raising the Standard for Ultrahigh-end Luxury Audio

The Lexicon GX-7 is a high-performance power amplifier designed to meet the rigorous demands of today’s home theater installations. It is designed with full complementary circuitry from input to output. It includes a high-current power supply driven by a massive, custom-designed, toroidal transformer with two separate windings for each channel.Each channel also features six discrete output devices, vast filter capacitance and is protected by an advanced protection circuit. Heat dissipation is accomplished by large heat-sinks mounted to each channel, enabling the GX-7 to function at full-power without the need for internal cooling fans. 

With seven channels, the GX-7 will be at home in today’s 7.1-channel music and cinema systems as well as for use in 5.1-channel systems with two additional channels that can be used in bi-wiring configurations, or to power speakers in another room. The GX-7 delivers 125 Watts/8 ohms per channel. The GX-7 includes high-quality gold-plated unbalanced (RCA) input connectors, as well as heavy-duty speaker output connectors. A trigger input connector allows the GX-7 to be powered on and off automatically with a preamplifier equipped with a trigger output.

The GX-7 is specially designed for many years of listening enjoyment. The GX-7’s impressive performance and flexibility ensure it is well equipped for the most sophisticated home theaters.

Features and Benefits

125 Watts/8 ohms per channel

Massive toroidal power transformer with two windings for each channel

High-power supply voltage for extra headroom at the outputs

Stable with mismatched, reactive, or unusual loads

Compatible with 4 ohm speaker impedances

Heat-sink mounted to each channel for cooling

Speaker protection against DC and frequencies below 10Hz

Protection against short circuits, device failures, miswiring, and internal faults

Trigger input for power control from an external device

RCA inputs

Gold plated input and output connectors

Rack-mount option available

Detailed Specifications:

FREQUENCY RESPONSE:  20Hz to 20kHz +0.1dB/-0.5dB; 10Hz to 40kHz +0.1dB/-1.5dB



INPUT SENSITIVITY:  1V for 100W out @ 8 Ohms

RATED OUTPUT POWER INTO 4 OHMS:  188W RMS per channel into 4 Ohms from 20Hz to 20kHz

RATED OUTPUT POWER INTO 8 OHMS:  125W RMS per channel into 8 Ohms from 20Hz to 20kHz

SIGNAL-TO-NOISE RATIO:  Greater than 100dB, ref 125W/8 Ohms (30kHz bandwidth)

TOTAL HARMONIC DISTORTION (THD):  Less than 0.05% at full power ratings

CROSSTALK:  Greater than -80dB @ 1kHz (30kHz bandwidth)

GAIN:  Minimum 28dB

DAMPENING FACTOR:  Greater than 200 @ 20Hz (ref 8 Ohms)

POWER REQUIREMENTS:  120V 60Hz 12 Amp (domestic) 230V 50Hz 7 Amp (export)

SPEAKER CONNECTIONS:  7 pairs of heavy-duty, gold-plated binding posts

SIZE:  HEIGHT – 5″ x WIDTH – 16.2″ x DEPTH – 19.5-inches (including handles) 17.12-inches (not including handles)

WEIGHT:  51 pounds (23.1 kg)

ACCESSORIES: Optional brackets are available for mounting the amplifier in a standard 19-inch equipment rack


Documentation to be added soon . . .