Parasound ZoneMaster250 Two Channel Power Amplifier

The ZoneMaster250 high-performance amplifier in Parasound’s ZoneMaster™ line combines legendary Parasound Class AB sound quality with the most reliable Class D power modules in the industry, setting a new standard in residential and commercial amplification.

Features:

• Our ZoneMaster models are very similar in their feature sets, differing mainly in size and number of channels. 
• Looking for more channels? Try the 1250, 650, or 450.
• Universal amplifier for applications from 50 to 200 watts
• 4 speaker connections (A and B outputs for both channels)
• High current for stable operation at 2 Ohms
• Channel pairs are bridgeable for up to 200 watts @ 4 Ohms
• Class AB input stage plus premium Class D power stage
• One Independent audio sensing trigger
• One Independent 12 volt trigger input
• Looping 12 volt trigger output for one zone
• Speaker level input for expanding systems w/out pre out jacks
• One bus input can be routed to any zone
• Looping output to connect additional amplifiers
• Mono mode combines L and R for single speaker applications
• Separate level controls for both 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
• ZoneMaster 250 Specific Features
• Compact 1u, 1/2 width chassis size
• Rack mount kit sold separately (click to view)
• Full Range Mono RCA Output
• 80Hz low pass Mono RCA output (for sub)
• Built in 80Hz low pass filter in bridged mode for driving in-wall/in-ceiling woofers or passive sub(s)

Power Output – RMS, All Channels Driven (20Hz - 20kHz)
50 watts x 2 @ 8Ω
90 watts x 2 @ 4Ω or 2Ω
160 watts x 1 @ 8Ω (Bridged Mode)
200 watts x 1 @ 4Ω (Bridged Mode)

Low Pass Crossover
80Hz, 18dB per octave

Minimum Speaker Impedance
Stereo Mode: 2Ω
Bridge Mode: 4Ω
Note: Operation at these minimum impedances might require additional ventilation.

Frequency Response
10Hz - 60 kHz, +0/-3dB

Total Harmonic Distortion
< 0.05% at typical listening levels
< 0.9% at full power

Interchannel Crosstalk
70dB at 20kHz

Input Sensitivity:
700mv = Full output (50 Watts @ 8Ω)
Total gain = 29dB (Level controls set to Maximum)

S/N Ratio
> 112dB, input shorted, IHF A-weighted

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

Audio Trigger Requirements
2mV audio signal (5-8 minutes turn off delay)

AC Power Requirement:
250 Watts maximum
15 Watts typical (music playing)
7.5 Watts idle (no music playing)
0.5 Watts in standby
110-130 VAC 60 Hz or 220-255 VAC 50 Hz
Note: AC mains voltage must be set only by a qualified electronics technician.

Dimensions:
Width: 8.5” (220 mm)
Depth: 10” (254 mm)
Depth: 12” (305 mm) with AC cord and cables connected
Height, with feet: 2” (51 mm)
Height, without feet: 1.75” (45 mm), 1U

Weight:
Net: 4.0 lbs. (1.8kg)
Shipping: 7.0 lbs. (3.1 kg)