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ZoneMaster 2350 Two Channel Amplifier with Sub Crossover

ZoneMaster 2350 Two Channel Amplifier with Sub Crossover

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Configuration Flexibility

This amp features a three-position Output Mode switch that gives you multiple configuration options. In Stereo mode, it can drive A and B speaker pairs, such as in your main room or in a second zone. A built-in impedance switch means you can even use hard-to-drive 4-ohm speakers in this configuration.

In Mono mode, it's 2-ohm stable, which allows it to drive up to 8 speakers at the same time in a large room or outdoor space, all playing the same mono signal. In Sub mode, an 80 Hz low-pass filter is applied, so the amp can drive one or more passive subwoofers. And there's a stereo RCA loop output that lets you daisy chain additional amplifiers.

The amp can start automatically when your system is turned on via a 12-volt trigger, or when it senses an incoming signal. Buttons on the front panel let you engage A/B or A+B speakers, or you can use to rear-panel lockout switch to keep both pairs on at all times.


- 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

Parasound ZoneMaster 2350 Amplifier User's Manual


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

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

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

Contact us to inquire how you can finance your purchase through our partner, Synchrony.