Designed to power the finest home theater and music systems, the ZX-7 is engineered to perform under the most demanding conditions. It delivers tremendous dynamics along with smooth extended highs, open midrange, and solid bass reproduction


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.


7-channel Amplifier

Frequency Response

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

Input Impedance

Minimum 10KOhms

Input Sensitivity

1V for 176W out @ 8 Ohms






20.3-inches (including handles) 19.3-inches (not including handles)


138 pounds (62.73 kg)



Rated Output Power into 4 ohms

450W RMS per channel into 4 Ohms from 20Hz to 20kHz

Rated Output Power into 8 ohms

300W RMS per channel into 8 Ohms from 20Hz to 20kHz

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


Greater than -60dB @ 1kHz (30kHz bandwidth)


Minimum 31dB

Power Requirements

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

Speaker Connections

7 pairs of heavy-duty, gold-plated binding posts

Included Accessories

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

Damping Factor

Greater than 400 from 10Hz to 400Hz


  • 300 watts x 7 channels
  • Dual oversized toroidal transformers
  • Full Balanced Topology
  • 4 hand-graded output devices per channel
  • Completely symmetrical circuit design
  • Advanced optically coupled protection for each channel