PSB SubSeries BP12 Dual 12" Bipolar Subwoofer at Vinyl Sound Toronto Canada

The SubSeries BP12 is the flagship powered subwoofer from PSB Speakers (Lenbrook Industries, Ontario, Canada), available at Vinyl Sound in Toronto, Canada. Designed as a dedicated high-fidelity loudspeaker rather than a conventional subwoofer accessory, the BP12 combines a proprietary bipolar dual 12" carbon fibre cone driver array, a 1000-watt Purifi amplifier in dual-mono configuration, and built-in IsoAcoustics isolation feet into a flagship-class subwoofer engineered to partner PSB's Synchrony speaker series. With a verified -3dB point at 20Hz and usable extension to 17Hz, app-controlled tuning via the free PSB Subwoofer Control app, and balanced XLR inputs for professional-grade signal integrity, the BP12 sets a new standard for what a PSB subwoofer can achieve in both home theatre and two-channel audiophile systems across the Greater Toronto Area.

Bipolar Dual 12" Carbon Fibre Driver System

The BP12's core engineering innovation is its bipolar driver configuration: two proprietary 12" (305mm) carbon fibre cone woofers mounted in opposition on opposite faces of a sealed enclosure. When two drivers are mounted this way and driven in phase, their opposing acoustic outputs cancel cabinet wall resonances rather than exciting them. The result is a subwoofer enclosure that is acoustically inert — the cabinet adds nothing to the sound, and the drivers operate with minimal coloration from cabinet vibration. Each driver is built to an exceptional specification: a 3.5" (89mm) voice coil for high excursion control, a massive 150 oz (4252g) magnet for powerful and precise motor force, a high-density rubber surround for consistent linearity at extreme excursion levels, and a rigid steel basket to maintain geometry under sustained high-power use. PSB spent several years optimizing these drivers specifically for their bipolar application in the BP12's sealed enclosure, prioritizing real-world listening performance alongside anechoic bench measurements. The bipolar configuration also reduces subwoofer localization in the listening room, making it easier to integrate the BP12 seamlessly with any speaker placement arrangement.

1000-Watt Purifi Amplification in Dual-Mono Configuration

The BP12 is the first PSB subwoofer powered by Purifi amplifier technology. Purifi is a Danish audio engineering firm whose amplifier designs are widely regarded among audiophiles as among the most linear and lowest-distortion amplifier modules available. The BP12's 1000W total output is delivered as 2 x 500 watts of continuous power in a dual-mono configuration, with each amplifier channel dedicated to one 12" driver independently. This arrangement provides each driver with exceptional damping factor control, extremely low noise, and the current delivery needed to manage the demanding loads of a high-excursion 12" driver at reference volume levels. The Purifi modules were not negotiable in the BP12's design process: PSB and Purifi's amplification provide the dynamic headroom and low-distortion performance that allows the BP12 to resolve low-level bass textures and subtle infrasonic detail that conventional Class-D amplifiers at similar price points cannot match. The result, according to PSB, is a subwoofer equally capable of explosive cinematic output and nuanced audiophile-grade bass resolution.

App-Based Control, IsoAcoustics Isolation, and Balanced Inputs

The BP12's premium feature set extends beyond its drivers and amplifier. The free PSB Subwoofer Control app connects via Bluetooth and allows adjustment of crossover frequency (variable from 30Hz to 150Hz, with a dedicated LFE setting at 350Hz), phase, and volume level from the listening position without moving the subwoofer or accessing rear-panel controls. This approach to tuning reflects PSB's philosophy that room integration is best optimized by ear from the listening seat, not by a single-point microphone measurement. Balanced XLR inputs ensure maximum signal integrity for integration with two-channel preamplifiers and high-end AV processors. Built-in isolation feet, developed in partnership with IsoAcoustics, decouple the BP12 from the floor to reduce unwanted room-coupled vibrations that can introduce coloration and low-frequency boom into the listening environment. The enclosure is finished in an automotive-grade surface treatment that is a clear step above the finish quality found on the BP8 and BP7 models lower in the SubSeries range.

Key Features

• Bipolar Dual 12" Carbon Fibre Driver Array: Two proprietary 12" carbon fibre cone woofers mounted in opposition in a sealed enclosure, cancelling cabinet resonances and delivering tighter, more accurate bass with reduced distortion and lower subwoofer localization in the listening room.
• Exceptional Driver Specification: Each 12" driver features a 3.5" voice coil, 150 oz magnet, high-density rubber surround, and steel basket, optimized through several years of development specifically for the BP12's bipolar sealed configuration.
• 1000-Watt Purifi Amplification, Dual-Mono: Two independent 500W Purifi amplifier channels, one per driver, deliver exceptional damping, extremely low noise and distortion, and the current headroom needed for reference-level playback at frequency extension to 17Hz.
• Sealed Bipolar Enclosure: Acoustically inert cabinet design eliminates port noise and resonance artifacts, providing clean, accurate bass response that integrates naturally with full-range audiophile speakers.
• PSB Subwoofer Control App: Free Bluetooth-connected app (iOS and Android) enables real-time adjustment of crossover frequency (30Hz to 150Hz), phase, and volume from the listening position without accessing rear-panel controls.
• Balanced XLR Inputs: Professional-grade balanced inputs ensure maximum signal integrity for integration with two-channel preamplifiers, AV processors, and high-end home theatre systems.
• Built-In IsoAcoustics Isolation Feet: Developed in partnership with IsoAcoustics, the integrated decoupling feet minimize floor-coupled vibrations and room resonance artifacts without requiring aftermarket isolation accessories.
• -3dB at 20Hz, Usable Extension to 17Hz: Verified low-frequency performance that reaches below the threshold of human hearing, covering the full infrasonic range of modern film soundtracks, pipe organ recordings, and electronic music.
• Designed for PSB Synchrony Speaker Pairing: The BP12 was developed as the natural bass companion to PSB's flagship Synchrony series, sharing the same commitment to driver precision and low-distortion engineering found across the Synchrony lineup.
• Automotive-Grade Finish: Premium enclosure surface quality significantly above the BP8 and BP7 models, designed to stand out as a statement piece in a high-end listening room or home theatre.

Technical Specifications

Connections at a Glance

• Balanced XLR Inputs: Left and Right channel line-level inputs for two-channel and home theatre preamplifier integration
• Line-Level Inputs: Standard RCA line-level inputs for AV receiver and processor connection
• App Control (Bluetooth): PSB Subwoofer Control app for crossover (30Hz to 150Hz), phase, and volume adjustment from the listening position
• Rear Panel: Phase, crossover, and volume controls accessible directly on the amplifier panel

Press Recognition

• FutureAudiophile.com, Michael Zisserson — full review praising the BP12 as a master class in engineering and noting that no other subwoofer near its price point approaches its level of acoustic precision and driver design quality (2025)

Frequently Asked Questions

What is the PSB SubSeries BP12?

The PSB SubSeries BP12 is the flagship powered subwoofer from PSB Speakers, featuring a bipolar dual 12" carbon fibre cone driver array in a sealed enclosure, a 1000-watt Purifi amplifier in dual-mono configuration, balanced XLR inputs, built-in IsoAcoustics isolation feet, and Bluetooth app control. It achieves a -3dB point at 20Hz with usable bass extension to 17Hz and is the most technically advanced subwoofer PSB has produced.

How does the PSB BP12 compare to the SVS SB-4000 or REL Carbon Special?

The PSB BP12, SVS SB-4000, and REL Carbon Special are all flagship sealed subwoofers targeting serious audiophile and home theatre systems. The SVS SB-4000 uses a single 13.5" driver with an 1200W amplifier, DSP-based app control, and claims a -3dB point at 20Hz. The REL Carbon Special uses a single 12" driver with REL's High Level Neutrik Speakon connection and focuses on two-channel integration through its unique input topology. The BP12 differentiates through its bipolar dual-driver configuration, which virtually eliminates cabinet resonance, and its Purifi amplification, which provides class-leading low distortion performance at full power. Unlike the SVS, the BP12 does not use DSP to extend bass response: its enclosure and driver are matched acoustically first, and the Purifi amplifier's exceptional damping factor controls the driver directly. For Toronto audiophiles who prioritize low-distortion accuracy and seamless integration with high-resolution two-channel systems, the BP12 is the most engineering-intensive choice in its class.

What is a bipolar subwoofer and why does it matter in the BP12?

A bipolar subwoofer uses two drivers mounted on opposite faces of a sealed enclosure, driven in phase. When the front driver pushes outward, the rear driver also pushes outward. This means both drivers are simultaneously pressurizing and depressurizing opposite sides of the cabinet, and their opposing reaction forces cancel each other out inside the enclosure rather than exciting cabinet wall resonance. The result is an acoustically inert cabinet that adds no coloration to the bass output, tighter transient response from the reduced cabinet-induced distortion, and lower subwoofer localization in the listening room because the drivers radiate in two directions. PSB spent several years optimizing the BP12's drivers specifically for this bipolar configuration to ensure the opposing driver interaction remained linear at all excursion levels.

Does the PSB BP12 require DSP or room correction?

No, the BP12 does not use DSP-based room correction or automatic calibration. PSB's design philosophy for the BP12 holds that optimizing a subwoofer's response at a single microphone position can create worse problems elsewhere in the listening room, because low-frequency behavior is determined by the room's total acoustic environment rather than any single point. Instead, the BP12 provides manual crossover, phase, and volume control through the PSB Subwoofer Control app, allowing the listener to tune by ear from the actual listening position. The BP12's sealed enclosure and acoustically matched driver array are designed to achieve natural, uncolored bass without DSP correction, which is why PSB did not want to hamstring the acoustic design with a cabinet smaller than optimal and then compensate with equalization.

What speakers pair best with the PSB BP12?

The BP12 was developed as the natural companion to PSB's flagship Synchrony series speakers, particularly the Synchrony T800 tower and Synchrony B600 bookshelf. Its driver design shares the same engineering philosophy as the Synchrony range: acoustic accuracy first, low distortion, and minimal cabinet coloration. The BP12's crossover range of 30Hz to 150Hz makes it compatible with virtually any full-range or bookshelf speaker system. For two-channel audiophile systems, it integrates via balanced XLR from a stereo preamplifier's subwoofer output. For home theatre, it connects via the LFE output of any AV receiver or processor with the crossover set to the 350Hz LFE mode.

Can the PSB BP12 be controlled without the app?

Yes, the BP12's crossover frequency, phase, and volume level are all accessible directly via rear-panel controls in addition to the PSB Subwoofer Control app. The app provides the convenience of adjusting settings from the listening position via Bluetooth without approaching the subwoofer, which is the preferred method for dialing in integration by ear. For users who prefer manual adjustment, all controls are available on the amplifier panel at the rear of the cabinet.

Where can I buy the PSB BP12 in Toronto or Canada?

The PSB SubSeries BP12 is available at Vinyl Sound, an authorized PSB dealer in Toronto, Canada. Vinyl Sound carries the full PSB SubSeries and Synchrony speaker lineup and can advise on system integration, amplifier pairing, placement optimization for the BP12's bipolar configuration, and listening room acoustic considerations for serious home theatre and two-channel audiophile installations throughout the Greater Toronto Area and across Canada.