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PSB SubSeries 350 Subwoofer
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Sophisticated sound from a small enclosure

The SubSeries 350 is crafted using the highest quality components, custom-tooled mechanics, and state-of-the-art driver technologies. PSB’s careful engineering and precision manufacturing results in a subwoofer that is capable of 300 watts of continuous power and dynamic peaks of 900 watts. If you don’t have a lot of available floor space, but want deep bass that makes you feel like you’re part of the action, the SubSeries 350 is for you.

Powerful Class D Amplification

Designed in collaboration with sister company NAD Electronics, the SubSeries 350 employs a custom-designed, high-current 300 watt MOSFET amplifier that uses advanced digital signal processing technology to deliver the flattest possible frequency response with extremely low distortion at high output levels. The amp is then perfectly matched with a 12” (300mm) front-firing for tight, powerful bass.

The next addition to your home theatre

With the SubSeries 350, seamless integration with your current home theatre system is easily achieved through adjustable rear-mounted volume, crossover and phase controls, as well as multiple connection options for your existing stereo amp or receiver. Placement within the home will also come easy with the SubSeries 350 as its sealed cube design is housed in an attractive high gloss black cabinet.

PSB Logo sml

Product highlights:

  • 12" front-firing polypropylene woofer
  • 300-watt RMS Class D MOSFET amplifier (900 watts peak power)
  • Frequency response: 25-150 Hz (±3dB)
  • Acoustic suspension (sealed) enclosure
  • Variable low-pass crossover (50-350 Hz)
  • Phase switch to help blend the subwoofer to your main speakers and room
  • Gold-plated RCA line-level and LFE (low frequency effects) inputs and outputs
  • speaker-level inputs and outputs
  • USB power port (5 volts, 500mA) for optional wireless adapter
  • Auto power on/off
  • Vibration-absorbing feet
  • Detachable 8-foot power cord
  • Durable MDF cabinet with high-gloss finish
  • Removable grille
  • (W x H x D)  400 x 405 x 410mm
  • Weight: 19.5 kg


PSB SubSeries: The PSB SubSeries 350 powered subwoofer is designed to provide the flattest possible frequency response, full bass extension, low distortion, and high output. The PSB SubSeries powered subwoofer is perfect for music and movie soundtracks.

Class D Discrete MOSFET Amp: The PSB SubSeries 350 powered subwoofer employs a custom-designed Class D discrete MOSFET amplifier rated at 300W RMS/900W Peak. The built-in digital amplifier features an automatic varying switching frequency that maintains maximum efficiency and low THD under all conditions. The Class D amplifier also incorporates proprietary limiting circuitry preventing audible overload while remaining true to the dynamics of your music or movie sound track. This circuitry combines peak limiting circuits that hold amplifier signal swing to the point just short of the amplifier's clipping, with compression circuitry that will reduce the amplifier's gain.

12" Woofer: To compliment the powerful Class D amplifier, the SubSeries 350 uses a front-firing 12" polypropylene cone woofer with rubber surround, high-temperature voice coil and vented pole piece. The woofer is designed to reduce mechanical noise and prevent harsh sounds at extreme excursion.

Sealed MDF Cabinet: The PSB SubSeries 350 features an acoustic suspension (sealed) MDF cabinet that is ultra-rigid and acoustically inert. It also comes with an acoustically transparent detachable grille. In addition, four vibration absorbing feet isolate the cabinet from your floor. As a result, the SubSeries 350 delivers tight, accurate bass that is uncoloured without distortion. The cabinet is finished in a high-gloss black.

Rear-Mounted Controls: Three rotary control knobs (Bass Level, Crossover, Phase) are provided on the rear-panel of the powered sub for setup.

  • Bass Level: The rotary Bass Level knob controls the output level of the powered subwoofer, relative to the volume of the other speakers in the system.
  • Crossover: The low-pass crossover adjusts the high-frequency roll-off of signals sent to the subwoofer. The control is continuously variable from 50 Hz to 150 Hz, and allows you to precisely match the subwoofer's bass production with your system's main left & right stereo speakers.
  • Phase: The phase dial allows for the adjustment of the phase of the subwoofer in relation to the speakers used in the system; from 0 to 180 degrees.

Low-Level & High-Level Connectivity: The PSB SubSeries 350 powered subwoofer offers multiple connection options - including LFE, Stereo RCA, and Speaker-Level inputs and outputs. Gold-plated terminals are used for the powered sub's inputs and outputs, providing excellent signal transfer.

  • LFE Input/Output: An LFE input is provided for connecting the powered subwoofer to your AV receiver's LFE output. Since the LFE output is filtered by most receivers/processors, the subwoofer's variable low-pass filter is not required and is bypassed. The powered subwoofer also has an LFE output for daisy-chaining additional subwoofers.
  • Stereo RCA Input/Output: If your receiver or integrated amplifier has preamp outputs, or if you are using a preamplifier without a designated subwoofer/LFE output, the preferred connection is to use the stereo RCA input of the powered subwoofer. In this setup, the subwoofer's internal crossover will used. The sub also has as stereo RCA low-level output, useful if your amp has pre-out/main-in jacks, or when using a separate preamp and amplifier. The low-level output is internally processed by the sub's active high-pass crossover at 80Hz.
  • Speaker-Level Input/Output: A set of speaker-level inputs are provided for connecting the powered sub to your receiver's left & right front speaker outputs, while a set of speaker-level outputs are provide to connect your front left & right loudspeakers to the powered sub. These 5-way binding-post terminals will accept bare wire (up to 10AWB), spade lugs, pin connectors, and banana plugs (single or dual). The powered subwoofer's low-pass crossover (50-150Hz) will send all low frequencies to the powered sub, while midrange and high frequencies are sent to your connected loudspeakers.

Auto On/Off: The powered subwoofer features a main power switch on the back panel. When switched to On, the subwoofer is initially in stand-by mode, awaiting the presence of an audio signal. When the signal is received, the subwoofer turns on automatically. When no signal is detected, the sub's amp will automatically turn off after approximately 15 minutes. In the Off position, the subwoofer will not power up. You can also setup the powered subwoofer to manually turn on and off with the main power switch.

Data Sheet

Spec Sheet




Canada is almost as far away from New Zealand as you can get, but it seems we are close on more than just stunning scenery and a large neighbour.

We also appear to share similar tastes in a great sounding loudspeakers. For over 30-years Canadian speakers have been popular addition to New Zealand homes. The Canadian sound differs from USA and UK markets, with their scientific approach being woven into the DNA of their products for the last 4 decades.

Perhaps inspired by nature, science or both, PSB are among the most awarded and reviewed Canadian loudspeaker companies.



In 1974, Paul met Dr. Floyd Toole, a world renowned psychoacoustician at the NRC, who conducted numerous studies to understand how sounds were interpreted by the human sense of hearing at both the psychological and physiological levels. To Paul, who had devoted much of his childhood to become an accomplished violinist, it was a “Eureka” moment. He had long puzzled over how to consistently reproduce on a set of speakers the unique timbres of different violins exactly as they would sound to him when he played them.

What Paul immediately recognised upon listening to Dr. Toole describe his research was that his findings gave him the formula he needed to design speakers that to the human sense of hearing, would be perceived as organic sounding.

In other words, he could create speakers that wouldn’t fatigue a listener over long periods of listening because the listener would perceive those sounds in the same way they would the nature’s roaring thunder of Niagara Falls to all the subtleties of the soundscapes at the Algonquin Provincial Park.

In Dr. Toole, Paul found a lifelong friend and peer who would influence him and whom he influenced, all in the pursuit of a way to reproduce sounds that listeners would perceive as equivalent to that which was real, alive, and natural.

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We are a business made up of passionate people who love their music, movies and everything related. Working with our nationwide network of A/V professionals we supply high-performing products offering a real point of difference and truly enhance our customers' lives. We are fortunate enough to have worked with some of the industry's best people and brands and have learnt a lot from the experience - if you're interested, there is more to the story.

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