Parasound ZoneMaster 2350 Universal Two-Channel Amplifier - Black

Three Hundred and Fifty Watts for the Rest of the House

The ZoneMaster 2350 is the amplifier for the parts of the house nobody sits in. Three hundred and fifty watts per channel into 8 ohms, 600 into 4 or even 2 ohms, from a 2U chassis weighing 15 pounds.

That weight is the giveaway. Parasound pairs its own Class AB input stage with a Class D power stage, so the amplifier runs cool and light while still driving long cable runs and low-impedance distributed loads.

It also takes speaker-level inputs as well as RCA. So it can hang off the speaker outputs of an existing amplifier or receiver, which is how most whole-house systems actually get retrofitted.

Inside the Chassis

Signal-to-noise is better than 114dB A-weighted and better than 100dB unweighted, which keeps a long distributed run quiet. Response covers 10Hz to 70kHz at −3dB, and holds within 0.8dB across the audible band.

Distortion stays under 0.05% at typical listening levels. The 0.9% figure quoted elsewhere applies only at full rated output, which is a level a distributed system almost never approaches in practice.

It measures 17-1/4 inches wide and 14-1/2 deep, 4-1/4 high with feet, or 2U without them. Parasound covers the ZM2350 with a 3-year parts and labor warranty for the original purchaser from an authorized dealer — longer than the NewClassic amplifiers, shorter than Halo.

Who Is This Amplifier Best For?

• You are wiring more than one room — 350 watts per channel into 8 ohms and 600 into 4 or 2 ohms drives long runs and multiple pairs without the amplifier folding back to protect itself.
• You are retrofitting an existing system — speaker-level inputs let it hang off an amplifier or receiver you already own, so a second zone does not mean rebuilding the first.
• The amplifier will live in a closet — a 2U chassis at 15 pounds runs cool on a Class D power stage, and it wakes on a 12V trigger or on audio signal, so nobody needs to reach it.
• You want the rack to switch as one — the 12V trigger has a looping output, so this amplifier can pass the signal along to the next component in the chain.
• You run a preamp or a streamer/DAC with its own volume — that is where the controls sit, and Halo P6 is built for this

How Does It Connect to Your System?

Feed it from a preamplifier or processor by RCA, or from an existing amplifier's speaker outputs using the speaker-level inputs. Speakers connect to the binding posts.

Turn-on can be by 12V trigger with a looping output to chain the rest of the rack, or by audio-signal sensing, which is what you want when the amplifier is behind a cupboard door.

Pairs Well With

Here are some great companions:

• Preamplifier: Required, and the natural next decision — see our Preamplifiers.
• Speaker Cables: Carry the current properly — see our Speaker Cables.
• Interconnects: Balanced XLR is the better run from preamp to amp — see our Interconnect Cables.
• Audio Rack: Give a Class A/AB amplifier air around it — see our Audio Racks.

Frequently Asked Questions

How much power does it make?

350 watts per channel into 8 ohms, and 600 watts per channel into 4 ohms or 2 ohms.

Can I connect it to an amplifier I already own?

Yes. It accepts speaker-level inputs as well as RCA line-level, so it can be driven from an existing amplifier or receiver.

What class is it?

A Parasound-designed Class AB input stage feeding a Class D power stage, which is why it stays cool and light for its output.

How does it turn on?

By 12V trigger with a looping output, or automatically on audio signal. Useful when the amplifier is out of reach.

How much rack space does it need?

Two rack units. It is 17-1/4 inches wide, 14-1/2 deep and 4-1/4 high with feet, weighing 15 pounds.

What warranty does it carry?

Parasound covers it with a 3-year parts and labor warranty for the original purchaser from an authorized dealer.

See It in Action

A full review of the ZoneMaster 2350:

An unboxing, with a look at the back panel:

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