The ZX-7 features a true balanced topology. Each of its seven channels consists of two amplifier stages, one for each side — both positive and negative — of the wave form. The positive input signal is amplified by the positive amplifier and the negative input signal is amplified by the negative amplifier when a balanced signal is applied to the input. This approach lowers noise, lowers distortion, and eliminates interference from external stray electronic fields. Music reproduction benefits from a cleaner soundstage and increased dynamics, while the presentation of subtle detail is improved appreciably due to the significantly lower noise floor.

Along with its exceptional sonic performance, the ZX-7 is equipped with sophisticated protection capabilities. Advanced optically coupled protection circuitry safeguards the ZX-7 from damage caused by excessive heat, short-circuits, device failures, miswiring, internal faults and reactive loads, plus it protects loudspeakers from DC and frequencies below 10Hz. Because the protection circuitry is optically coupled for each channel, it is completely isolated from the audio signal path — eliminating any potential degradation of the audio signal inherent in traditional protection schemes.

A formidable combination of power and finesse, the ZX-7 is the obvious choice for audio enthusiasts looking for maximum performance from their listening systems.


Description 7-channel Amplifier
Inputs 7 RCA | XLF
Speaker Connections 7 pairs of heavy-duty, gold-plated binding posts
Rated Output Power into 8 ohms 300W RMS per channel into 8 Ohms from 20Hz to 20kHz
Rated Output Power into 4 ohms 450W RMS per channel into 4 Ohms from 20Hz to 20kHz
Frequency Response 20Hz to 20kHz +0.1dB/-0.5dB; 10Hz to 40kHz +0.1dB/-1.5dB
Signal-to-Noise Ratio Greater than 100dB, ref 300W/8 Ohms (30kHz bandwidth)
Total Harmonic Distortion (THD) Less than 0.05% at full power ratings
Crosstalk Greater than -60dB @ 1kHz (30kHz bandwidth)
Damping Factor Greater than 400 from 10Hz to 400Hz
Input Sensitivity 1V for 176W out @ 8 Ohms
Gain Minimum 31dB
Input Impedance Minimum 10KOhms
Power Requirements 120V 60Hz 12 Amp (domestic) 230V 50Hz 7 Amp (export)
Height 9.5"
Width 17.2"
Depth 20.3-inches (including handles) 19.3-inches (not including handles)
Weight 138 pounds (62.73 kg)
Included Accessories Optional brackets are available for mounting the amplifier in a standard 19-inch equipment rack.


2008 Review by John E. Johnson Jr., Secrets of HT & Hi-Fi

2008 News Post, HomeTheaterReview.com

2008 Premium Award – Surround Amplifier, Home Theater Tech (China)

2007 Outstanding AV Receiver – Super AV Award, Sound Concepts (China)


©2014 Harman International Industries, Inc.