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ZoneMaster® ZM4
ZoneMaster® ZM4
ZoneMaster® ZM4
ZoneMaster® ZM4
ZoneMaster® ZM4
ZoneMaster® ZM4
Parasound

ZoneMaster® ZM4

Model AZM4 · Series ZoneMaster

Compact 4-channel amp that delivers 120 W per channel. ZM4 offers multi-zone stereo/mono, audio-trigger, and energy efficiency for rooms and home theater.

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At a glance

All specifications
Interchannel Crosstalk
70 dB at 20 kHz
DC Trigger Requirements
+9 Vdc to +12 Vdc, 5 mA
Audio Trigger Requirements
2 mV audio signal
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Overview

Powerful Multi‑Zone Sound in a Compact Rack Unit

The ZM4 fits into a mere 1U chassis but packs four full channels—ideal for powering speakers in multiple rooms without taking up space. Whether you’re running backyard speakers, a secondary stereo, or home theater surrounds, it delivers clean, consistent volume that stays smooth even under heavy loads.

In plain terms: 120 W ×4 into 8 Ω (150 W ×4 into 4/2 Ω; 2‑ohm stable), a Class‑AB input stage feeding premium Class‑D outputs, A/B speaker outputs per channel with stereo/mono per‑zone switching, and bus input with loop‑outs plus per‑zone audio‑sensing and 12 V triggers for painless installs.

Highlights

  • 120 watts x4 @ 8 Ω
  • 150 watts x4 @ 4 Ω or 2 Ω
  • 8 speaker connections (A and B outputs for both channels)
  • High current for stable operation at 2 Ohms
  • Class AB input stage plus premium Class D power stage
  • Bus input with looping outputs
  • Audio sensing auto-on trigger, independent for each zone
  • 12 volt auto-on trigger inputs, one for each zone
  • Master 12V trigger input to turn all zones on-off together
  • Looping 12 volt trigger outputs
  • Speaker level input for expanding systems w/out pre out jacks
  • Mono mode combines L and R for single speaker applications
  • Separate level controls for all 4 channels
  • Detachable speaker connectors accept up to 12 gauge wire
  • Short circuit and overheat protection with front panel indicators
  • 0.5 watt standby power consumption meets Energy Star & EU specs
  • Compact 1u chassis size
  • Rack mount kit included in the box

Specifications

Specifications

Power Output –
RMS, Both Channels Driven (20 Hz - 20 kHz) 120 watts x 4 @ 8Ω 150 watts x 4 @ 4Ω or 2Ω
Minimum Speaker Impedance
A+B Outputs of a Single Channel: 2 Ω Note: Continuous operation at this minimum impedance might 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)
S/N 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: 16" (406 mm) with cables connected Height, with feet: 2.5" (63.5 mm) Height, without feet: 1.75" (45 mm), 1U
Weight
Net: 12 lbs. (5.5kg) Shipping: 18 lbs. (8.2 kg)

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