ZoneMaster® ZM12
12-Zone Audio Power—Compact, Precise, and Ready
The ZM12 packs twelve channels of powerful amplification into a compact 2U rack unit—perfect for delivering music or voice across multiple rooms without taking up space. It combines robust power with flexibility, making it ideal for home or commercial multi-room sound systems.
The ZM12 powers 12 channels across 6 zones, with Zone 1 at 120 W/ch into 8 Ω (150 W into 4/2 Ω) and Zones 2–6 at 60/100 W. A Class‑AB input stage feeds premium Class‑D modules that are stable at 2 Ω, while A/B speaker outputs per channel (24 total) and stereo/mono per‑zone switching simplify real‑world wiring. Integration is painless with per‑zone audio‑sensing and 12 V triggers plus a speaker‑level input for systems without pre‑outs.
Why installers choose it
- One amp, whole house: 6 independent zones with higher‑power Zone 1 for the main living area.
- Flexible wiring: A/B outputs per channel (up to 24 speakers) and summed‑mono for single‑speaker areas.
- Easy automation & retrofits: Per‑zone audio‑sense/12 V triggers, bus inputs/loop‑outs, and a speaker‑level input when there are no pre‑outs.
Power Output : Zone 1 (Channel 1–2)
120 watts x 2 @ 8Ω
150 watts x 2 @ 4Ω or 2Ω
Power Output : Zone 2-6 (Channels 3–12)
60 watts x 10 @ 8Ω
100 watts x 10 @ 4Ω or 2Ω
Note: Power ratings are RMS, All Channels Driven (20 Hz - 20 kHz)
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:
1550 Watts maximum
150 Watts typical (audio playing on all zones)
55 Watts idle (all zones on)
15 Watts idle (one zone on)
0.5 Watts standby
100-250 VAC 50/60 Hz (automatic)
Dimensions:
Width: 17.25" (437 mm)
Depth: 14.5" (369 mm)
Depth, with cables: 16" (406 mm)
Height, with feet: 4.15" (105 mm)
Height, without feet: 3.5" (89 mm)
Weight:
Net: 21 lbs (9.5kg)
Shipping: 27 lbs (12.2kg)
- Our new ZoneMaster® models are very similar in their feature sets, differing mainly in size and number of channels. Looking for fewer channels? Try ZoneMaster® ZM2 or ZM4.
- Universal amplifier for applications from 60 to 150 watts
- Zone 1 (channel 1&2) are higher power for more demanding applications
- 24 speaker connections (A and B outputs for all 12 channels)
- High current for stable operation at 2 Ohms
- Class AB input stage plus premium Class D power stage
- Independent audio sensing triggers, one for each zone
- 6 Independent 12 volt trigger inputs, one for each zone
- Looping 12 volt trigger outputs for each zone
- Master 12 volt trigger input to turn all zones on-off
- Speaker level input for expanding systems w/out pre out jacks
- Two bus inputs can be routed to any zone
- Bus loop output jacks for passing audio to another amp
- Summed Mono mode combines L and R for single speaker applications
- Separate level controls for all twelve 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 2U chassis
- 2U rack mounting hardware is included in box<
None at this time