PSB M4U TWM True Wireless Micro Planar Earphones at Vinyl Sound Toronto Canada

The M4U TWM is a true wireless in-ear earphone from PSB Speakers (Pickering, Ontario, Canada), available at Vinyl Sound in Toronto, Canada. Part of the M4U headphone family alongside the M4U 9 over-ear, the M4U TWM applies a Hybrid Planar dual-driver design to a compact true wireless form, pairing a Magneto-Static high-frequency transducer with a planar dynamic midrange and bass driver in a 6mm earbud shell. Qualcomm aptX Adaptive Bluetooth delivers low-latency wireless audio with adaptive bitrate, while Audiodo Personal Sound and PSB's proprietary RoomFeel technology provide per-ear calibration and speaker-like spatial character. The smart charging case supports both USB-C wired and Qi wireless charging, delivering 8 hours from each charge and 32 hours of total playback across three case charge cycles. IP65 rating covers sweat, water, and dust resistance for active use.

Hybrid Planar Dual-Driver Technology

The M4U TWM uses a driver architecture that is uncommon in the true wireless earphone category. Rather than a single dynamic driver or a balanced armature and dynamic hybrid, PSB implements two dedicated planar-type transducers within each 6mm earbud shell. A Magneto-Static driver handles high-frequency reproduction, using a thin conductive membrane suspended within a powerful magnetic field to move air with very low mass and extremely fast transient response at the top of the frequency range. A separate planar dynamic driver covers midrange and bass, applying the same membrane-in-magnetic-field operating principle to lower frequencies for accurate, controlled bass output without the cone resonance artefacts common in conventional dynamic drivers. The dedicated frequency-specific transducers eliminate the compromises inherent in a single-driver design and allow each element to operate within its optimal excursion and frequency range. SoundStage Solo noted the resulting sound as capable of competing meaningfully with earphones well above the M4U TWM's price point.

aptX Adaptive Bluetooth with cVc Voice Technology

The M4U TWM uses Qualcomm's aptX Adaptive codec, which dynamically adjusts its bitrate to maintain the highest available audio quality relative to wireless signal conditions while supporting very low latency for gaming and video synchronisation. This codec operates over Bluetooth 2.4GHz and provides better fidelity than standard aptX or SBC across all listening scenarios. cVc (clear voice capture) microphone processing reduces background noise during calls, separating voice audio from ambient sound in outdoor and noisy indoor environments. Physical hard-click buttons on each earbud control volume, track selection, and call management without requiring touch gesture recognition, providing reliable tactile control during exercise or when hands are wet.

RoomFeel, Audiodo Personal Sound, and the PSB Headphones App

Two personalisation layers adapt the M4U TWM's sonic character to each listener. RoomFeel applies PSB's room-gain research to the in-ear format, recreating the low-frequency warmth and spatial openness that speaker systems derive from room boundary reflections — a characteristic entirely absent in conventional earphone tuning. The result is a more natural, open presentation that reduces the isolation-induced fatigue common in in-ear monitors. Audiodo Personal Sound runs a per-ear hearing calibration in the PSB Headphones App, generating an independent compensation curve for each ear based on assessed hearing threshold variations. Four EQ presets covering RoomFeel, tighter bass, more detail, and better dialogue are available alongside a transparency mode that blends ambient sound into the audio feed for situational awareness without removing the earphones. All settings, firmware updates, and battery monitoring are managed through the iOS and Android PSB Headphones App.

Key Features

• Hybrid Planar Dual-Driver Design: Each earbud contains two dedicated planar-type transducers: a Magneto-Static driver for high frequencies and a planar dynamic driver for midrange and bass, delivering a division of frequency labour that conventional single-driver earphones cannot achieve.
• Magneto-Static High-Frequency Driver: The ultra-low-mass Magneto-Static transducer reproduces high-frequency detail with exceptional speed and resolution, maintaining clarity at low listening volumes where conventional dynamic tweeters can sound compressed.
• aptX Adaptive Bluetooth: Adaptive bitrate codec provides low-latency, high-fidelity wireless audio for music, gaming, and video, with dynamic bitrate adjustment based on signal conditions.
• cVc Clear Voice Capture: Microphone processing technology reduces ambient noise during calls, isolating voice audio from background sounds for clear communication in noisy outdoor and public environments.
• PSB RoomFeel Technology: Proprietary DSP processing applies room-gain research to the in-ear format, reducing the in-head sensation characteristic of earphones and presenting a more open, speaker-like listening experience.
• Audiodo Personal Sound: Per-ear hearing calibration via the PSB Headphones App creates an individual compensation curve for each ear, correcting for personal hearing threshold asymmetries to optimise the tonal balance of PSB's True-to-Nature sound signature.
• Four EQ Presets: RoomFeel, Tighter Bass, More Detail, and Better Dialogue presets are accessible through the PSB Headphones App for content-type optimisation.
• Transparency Mode: Ambient sound blending allows situational awareness in traffic, public transport, and gym environments without removing the earphones.
• 32 Hours Total Battery Life: 8 hours per earbud charge with three additional full charges stored in the case for 32 hours of total playback; earbuds recharge in 66 minutes.
• Qi Wireless and USB-C Case Charging: The smart charging case supports both Qi wireless pad charging and USB-C wired charging, with full case charge in 2 hours.
• IP65 Rated: Certified sweatproof, water-resistant, and dustproof for active use in gym, outdoor, and commuting environments.
• Physical Click Button Controls: Hard-click buttons on each earbud provide tactile volume, track, and call control without touch gesture misactivation during exercise or wet conditions.
• Three Silicone Tip Sizes Included: Small, medium, and large silicone ear tips allow a secure, noise-isolating fit across a range of ear canal sizes.
• PSB Headphones App: Full-featured iOS and Android companion app manages Audiodo calibration, EQ presets, transparency levels, battery monitoring, and over-the-air firmware updates.

Technical Specifications

What's in the Box

• PSB M4U TWM True Wireless Micro Planar Earphones (pair)
• Smart charging case with USB-C and Qi wireless charging
• Silicone ear tips: Small, Medium (installed), Large
• USB-A to USB-C charging cable
• Quick-start guide

Frequently Asked Questions

What are the PSB M4U TWM earphones?

The PSB M4U TWM are true wireless in-ear earphones from PSB Speakers, a Canadian audio brand headquartered in Pickering, Ontario. They use a Hybrid Planar dual-driver design in a 6mm earbud, pairing a Magneto-Static high-frequency transducer with a planar dynamic midrange and bass driver. Qualcomm aptX Adaptive Bluetooth, Audiodo Personal Sound per-ear calibration, and PSB RoomFeel DSP processing deliver a personalised, audiophile-oriented listening experience. Each earbud provides 8 hours of playback, with the Qi wireless and USB-C charging smart case extending total runtime to 32 hours. IP65 certification covers sweat, water, and dust resistance.

How do the PSB M4U TWM compare to the Sony WF-1000XM5 or Sennheiser Momentum True Wireless 4?

The PSB M4U TWM, Sony WF-1000XM5, and Sennheiser Momentum True Wireless 4 each occupy the premium true wireless earphone space but differ significantly in their priorities. The Sony XM5 and Sennheiser Momentum 4 both feature active noise cancellation as a central feature, while the M4U TWM offers transparency mode only and does not include ANC. The M4U TWM's primary differentiator is its Hybrid Planar dual-driver architecture, a driver type that neither Sony nor Sennheiser applies in the true wireless category. The per-ear Audiodo Personal Sound calibration system adds a personalisation depth not available in either competitor. For listeners who prioritise driver technology and tonal personalisation over maximum ANC performance, the M4U TWM offers a genuinely distinct approach at a lower price point than both alternatives.

Do the PSB M4U TWM have active noise cancellation?

No, the PSB M4U TWM do not include active noise cancellation. They offer a transparency mode that blends ambient environmental sound into the audio feed for situational awareness, but they do not reduce external noise electronically. Passive noise isolation from the three-size silicone ear tips and the in-ear seal provides a degree of ambient sound reduction, which is appropriate for most commuting and gym use cases. Listeners who require strong ANC for aircraft, open-plan offices, or high-noise transit environments should consider the PSB M4U 9 over-ear headphones, which include all-digital ANC via four MEMS microphones.

What is a Magneto-Static driver and why is it used in the M4U TWM?

A Magneto-Static driver uses a thin, lightweight conductive membrane suspended between two magnetic arrays, moving in response to an electrical audio signal in a similar manner to a planar magnetic loudspeaker. Unlike a conventional dynamic driver, which uses a voice coil attached to a cone, the Magneto-Static membrane moves as a whole rather than pistoning from an excitation point, resulting in lower distortion, faster transient response, and better high-frequency resolution at low listening volumes. In the M4U TWM, the Magneto-Static transducer handles only high-frequency reproduction, operating in its optimal frequency range without the bass excursion demands that would stress its lightweight membrane. This is the same operating principle applied in high-end planar magnetic headphones from brands such as Audeze and HiFiMAN, adapted into a 6mm true wireless earbud shell.

Can the PSB M4U TWM case be charged wirelessly?

Yes, the PSB M4U TWM charging case supports both Qi wireless pad charging and USB-C wired charging. Placing the case on any Qi-compatible wireless charging pad will top up the case battery without requiring a cable connection. A USB-A to USB-C cable is included for wired charging. Full case charge from empty takes approximately 2 hours via either method, after which the case holds three full earbud charge cycles for 24 additional hours of playback beyond the 8 hours in each earbud.

How does Audiodo Personal Sound work in the M4U TWM?

Audiodo Personal Sound is a per-ear hearing calibration system accessed through the PSB Headphones App on iOS or Android. The app plays a series of audio tones and asks questions to assess each ear's hearing thresholds and tonal perception independently. The system then calculates and applies a compensation curve that corrects for individual hearing asymmetries between the left and right ears, ensuring both sides of the stereo field are balanced to each listener's actual hearing profile. Volume Dependent Compensation adjusts the calibration dynamically as listening volume changes, maintaining the intended tonal balance at all playback levels. The calibration result can be saved in the app and reapplied after firmware updates.

Where can I buy the PSB M4U TWM in Toronto or Canada?

The PSB M4U TWM True Wireless Micro Planar Earphones are available at Vinyl Sound in Toronto, Canada. Vinyl Sound is an authorised PSB Speakers dealer serving the Greater Toronto Area and customers across Canada, offering the complete PSB M4U headphone and earphone range alongside PSB's full speaker lineup. Visit Vinyl Sound in Toronto or shop online at vinylsound.ca to order the M4U TWM.