• Lexicon-RX-7-front
  • Lexicon-RX-7-rear
  • Lexicon-RX-7-front
  • Lexicon-RX-7-rear

Lexicon RX-7 7-Channel Power Amplifier

Raising the Standard for Ultrahigh-end Luxury Audio

This is a reference-quality amplifier designed to meet the highest standards of power and performance under the most extreme operating conditions. Equipped with advanced thermal, current, DC, and speaker protection, your new amplifier delivers reliable and exceptional performance with most loudspeakers, including mismatched, reactive, and unusual loads. With embedded protection against short circuits, component failures, mis-wiring, and internal faults, the incredible power and wide-ranging flexibility of the ZX-7 and RX-7 amplifiers confirm that they are at home in the most sophisticated and demanding home theaters.

Both the ZX-7 and RX-7 are fully balanced power amplifiers from input to output with completely symmetrical circuit design. In other words, each channel consists of two complete amplifier circuits; one driving the positive input signal and the other driving the negative input signal. With 7 channels, this translates into 14 separate amplifier circuits per chassis. The advantage of this topology over single-ended designs is that it exhibits lower noise, lower distortion, immunity from stray electronic fields and anomalies in the input signal from outside interference. This results in significant audible benefits including increased overall clarity and more pronounced differences between soft and loud passages.

Internally, the ZX-7 and RX-7 both utilize two massive toroidal transformers and lots of filter capacitance to ensure rock-solid lowfrequency reproduction and ample power reserves. The ZX-7 delivers 300 Watts per channel into 8 Ohms, while the RX-7 delivers 200 Watts per channel into 8 Ohms. Equipped with gold-plated speaker output connectors, the rear panel includes balanced or unbalanced audio input via RCA and XLR connectors. A trigger input connector allows the amplifiers to be controlled with associated components such as the MC-12HD or MC-8 Digital Controllers. The ZX-7 and RX-7 amplifiers include advanced optically coupled protection for each channel.

Features and Benefits


RX-7: 200 Watts per channel @ 8 Ohms


Dual oversized toroidal power transformers with extraordinarily low DC resistance and thermal protection


High-power supply voltage for extra headroom at the outputs


Stable with mismatched, reactive, or unusual loads


Thermal protection against overheating


Speaker protection against DC and frequencies below 10Hz


Protection against short circuits, device failures, mis-wiring, and internal faults


Trigger input for power control from an external device


Gold plated input and output connectors


RCA and XLR inputs


Rack-mount option available


Noise elimination


Delayed audio turn-on to eliminate noises from driving equipment


Completely symmetrical circuit design which ensures optimal audio sonality


Hefty power supplies with lots of filter capacity ensures rock-solid bass


High damping factor (no output relays) ensure realistic, impressive bass transients


Advanced protection circuitry ensures reliability under any sort of user abuse


Detailed Specifications:


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


INPUTS:  7 RCA + 7 XLR


INPUT IMPEDANCE:  Minimum 10KOhms


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


RATED OUTPUT POWER INTO 4 OHMS:  300W RMS per channel into 4 Ohms from 20Hz to 20kHz


RATED OUTPUT POWER INTO 8 OHMS:  200W 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 400 from 10Hz to 400Hz


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 – 7.5″ x WIDTH – 17.2″ x DEPTH – 18.5-inches (including handles) 17.5-inches (not including handles)


WEIGHT:  108 pounds (49.1 kg)


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


 Review

Documentation to be added soon . . .