ParasoundZoneMaster 4Universal

Parasound ZoneMaster 4 - Universal 4 Channel 8 Speaker Amplifier

The Parasound ZoneMaster 4 (ZM 4) is a compact and powerful 4-channel amplifier ideal for custom home theatre and multi-room audio systems. Delivering up to 150 watts per channel, it supports up to eight speakers across two zones, providing reliable, high-quality sound performance with advanced features.

Key Features

• Power Output: 120 watts x 4 @ 8 Ω, 150 watts x 4 @ 4 Ω or 2 Ω
• Supports 8 speaker connections (A and B outputs for both channels)
• High current design ensures stable operation at 2 Ω
• Class AB input stage combined with premium Class D power stage for efficiency and sound quality
• Bus input with looping outputs for daisy-chaining multiple amplifiers
• Independent audio sensing auto-on triggers for each zone
• 12 volt auto-on trigger inputs for each zone and a master 12V trigger input to control all zones simultaneously
• Looping 12 volt trigger outputs
• Speaker level input for expanding systems without pre-out jacks
• Mono mode combines left and right channels for single speaker applications
• Separate level controls for all four channels
• Detachable speaker connectors accept up to 12 gauge wire
• Short circuit and overheat protection with front panel indicators
• Energy-efficient with 0.5 watt standby power consumption, meeting Energy Star and EU specifications
• Compact 1U chassis size with included rack mount kit

Specifications

Power Output – RMS, Both Channels Driven (20 Hz - 20 kHz):
120 watts x 4 @ 8 Ω
150 watts x 4 @ 4 Ω or 2 Ω

Minimum Speaker Impedance:
A+B outputs of a single channel: 2 Ω
Note: Continuous operation at this minimum impedance may require additional ventilation for the amplifier.

Frequency Response:
20 Hz - 20 kHz, +0/-0.25 dB
5 Hz - 50 kHz, +0/-3 dB

Total Harmonic Distortion:
< 0.05% at typical listening levels
< 1.0% at full power

Interchannel Crosstalk: 70 dB at 20 kHz

Total Gain: 29 dB (level controls set to maximum)

Signal-to-Noise Ratio: >112 dB, input shorted, IHF A-weighted

DC Trigger Requirements: +9 Vdc to +12 Vdc, 5 mA

Audio Trigger Requirements: 2 mV audio signal

AC Power Requirement:
600 watts maximum
60 watts typical (music playing in all zones)
30 watts idle (all zones on)
15 watts idle (one zone on)
100-250 VAC 50/60 Hz (automatic)

Dimensions:
Width: 17.25" (437 mm)
Depth: 14.25" (362 mm)
Depth with cables connected: 16" (406 mm)
Height with feet: 2.5" (63.5 mm)
Height without feet: 1.75" (45 mm), 1U

Weight:
Net: 12 lbs (5.5 kg)
Shipping: 18 lbs (8.2 kg)