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 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. 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.
| Brand | Parasound |
| Model | ZoneMaster ZM4 |
| Channels | 4 |
| Power per channel, 8 Ω (W) | 120 |
| Power rated from (Hz) | |
| Power rated to (Hz) | |
| Power rated at THD (%) | |
| Power rated with channels driven | |
| Power per channel, 4 Ω (W) | 150 |
| Bridged power, 8 Ω (W) | |
| Frequency response | 20 Hz – 20000 Hz −0.25 dB; 5 Hz – 50000 Hz −3 dB |
| Total harmonic distortion (%) | 0.05 |
| Signal-to-noise ratio (dB) | 112 |
| Damping factor | |
| Input impedance (Ω) | |
| Gain (dB) | 29 |
| Height (mm) | 64 |
| Width (mm) | 437 |
| Depth (mm) | 362 |
| Weight (kg) | 5.5 |