• 350 watts x 2 @ 8 Ω
• 600 watts x 2 @ 4 Ω
• 2 Ω stable for driving multiple speaker pairs
• Two pairs of speaker outputs with A/B buttons
• Lockout switch on rear panel to disable A/B buttons
• High pass filter, switchable for 30Hz or 80Hz
• Automatic on/off by 12V trigger w/ looping output
• Automatic on/off by audio signal
• Speaker level input enables integration with systems lacking preamp output jacks
• Parasound designed class AB input stage w/ premium Class D power stage
• Subwoofer mode for driving multiple in-wall subs without the need for an external crossover
• Mono mode combines L and R for single speaker applications
• Mono full range preamp output
• Subwoofer 80Hz, 24dB/oct. low pass preamp output
• Looping left and right output jacks
• Left and right input level controls
• Efficient, low heat design
• Short circuit and overload protection
• 0.5 watt standby power consumption meets EU and Energy Star requirements
• 2U rack mounting hardware is included in box

Power Output
RMS, Both Channels Driven (20 Hz – 20 kHz)
350 watts x 2 @ 8 Ω
600 watts x 2 @ 4 Ω or 2 Ω

Minimum Speaker Impedance (Output A+B)
Stereo or Mono Mode: 2 Ω
Subwoofer Mode: 4 Ω
Note: Operation at these minimum impedances might require additional ventilation.

Frequency Response
10 Hz – 70 kHz, +0/-3 dB
20 Hz – 20 kHz, +0/-0.8 dB

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

Inter-channel Crosstalk
70 dB at 20 kHz

Input Sensitivity:
2 Volts = Full output (350 Watts @ 8 Ω)
Total gain = 29 dB (Level controls set to Maximum)

S/N Ratio
> 100 dB, input shorted, unweighted
> 114 dB, input shorted, IHF A-weighted

High and Low Pass Crossovers
Sub Mode and Sub out jack: 80 Hz, 24 dB per octave
High Pass Filter: 30 Hz or 80 Hz, 12 dB per octave

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

Audio Trigger Requirements
2 mV audio signal (8-15 minutes turn off delay)

AC Power Requirement
1500 Watts maximum
100 Watts typical (music playing, typical listening level)
30 Watts idle (no music playing)
0.5 Watts in standby
110-240 VAC 50/60 Hz

Dimensions
Width: 17.25" (438 mm)
Depth: 14.5" (368 mm)
Depth: 16.25" (412 mm) with cables connected
Height, with feet: 4.25" (108 mm)
Height, without feet: 3.5" (89 mm), 2U

Weight
Net: 15 lbs. (6.8 kg)
Shipping: 22.25 lbs. (10.1 kg)

Audio Beatnik May 2019
"The ZoneMaster 2350 amp is the real thing [...] highly recommended. You will get much more than you think you paid for."

Zero Fidelity May, 2018

Unboxing and Overview - by Youthman (YouTube)

ZoneMaster 2350 Listener Reports

p>ZM2350 Manual

ZM2350 Cut Sheet