Parasound ZoneMaster® ZM4
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 Ω150 W ×4 into 4/2 Ω; 2‑ohm stable), a Class‑AB input stage feeding premium Class‑D outputsA/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.
What users say
- Clear, dynamic sound and plenty of headroom.
- Handles power‑hungry speakers without flinching.
- You get real music tone, not just volume.
Covered by Parasound's 2-Year Parts & Labor Warranty. Terms effective September 1, 2026.
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Specifications
- Power Output
- 120 watts x 4 @ 8Ω 150 watts x 4 @ 4Ω or 2Ω
- Minimum Speaker Impedance
- 2 Ω
- 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)
Manufacturer's Description — Parasound
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 Ω150 W ×4 into 4/2 Ω; 2‑ohm stable), a Class‑AB input stage feeding premium Class‑D outputsA/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.
What users say
- Clear, dynamic sound and plenty of headroom.
- Handles power‑hungry speakers without flinching.
- You get real music tone, not just volume.
Covered by Parasound's 2-Year Parts & Labor Warranty. Terms effective September 1, 2026.
Verified Dealers
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Authorized dealers for Parasound ZoneMaster® ZM4
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Acoustic Sounds — online and in-store — Salina, Kansas, United States (website)
- All Elite Audio — online and in-store — Perry Hall, Maryland, United States (website)
- All That Audio — in-store — Anaheim, California, United States (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- Analogue Seduction — online and in-store — Whittlesey, England, United Kingdom (website)
- Anointed Soundz — in-store — Cedar Hill, Texas, United States (website)
- Area Hifi — online and in-store — L'Eixample, Comunidad Valenciana, Spain (website)
- Audible Images — in-store — Melbourne, Florida, United States (website)
and 86 more verified dealers