Compare detailed specifications, side-by-side differences, verified user reviews, and buying recommendations to help you make the right choice.
Deciding between the Sennheiser PXC 550-II and the Bowers & Wilkins PI4 depends on your available space, storage capacity goals, and everyday usage style:
Designed for large households, bulk grocery shoppers, and long-term storage where total cubic feet is the highest priority.
Ideal for apartments, offices, dorms, or secondary kitchen use where space efficiency and neat organization are paramount.
| Specification | Sennheiser PXC 550-II | Bowers & Wilkins PI4 |
|---|---|---|
| General | ||
| Touch | Yes | No |
| Voice Coil | — | — |
| Magnet | — | — |
| Active Noise Cancellation | Yes | Yes |
| Foldable | Yes | No |
| Connectivity (Wired/Wireless) | Both | Both |
| Waterproof | — | — |
| Audio Performance | ||
| Impedance (Ω) | 46 | — |
| Total Harmonic Distortion (%) | 0.5 | 0.3 |
| Sensitivity (dB) | 110 | — |
| Frequency Response (Hz) | 17-23000 | 10-30000 |
| Connectivity | ||
| Bluetooth Version | 5 | 5 |
| Bluetooth Profiles | A2DP, AVRCP, HSP, HFP | A2DP v1.3.1, AVRCP v1.6.1, HFP v1.7.1, HSP v1.2, BLE GATT |
| Supported Audio Codecs | SBC, aptX, aptX Low Latency, AAC | AptX-Adaptive, AptX-HD, AptX-Classic, AAC, SBC |
| Bluetooth | Yes | Yes |
| Audio Cable Length (mm) | — | — |
| Charging Cable Length (m) | — | 0.2 |
| Multipoint Support | Yes | — |
| Wireless Range (m) | — | — |
| Battery | ||
| BATTERY OPERATED | Yes | Yes |
| Charging Port | Micro-USB | USB Type C |
| Wireless Charging | No | No |
| Standby Time (hours) | — | — |
| Recharge Time (hours) | 3 | — |
| Others | ||
| APP CONTROL | Yes | — |
| Voice Assiatant | Yes | No |
| Amazon Alexa | Yes | No |
| Physical | ||
| Weight (Ounces) | 8 | 1.48 |
| Dimensions (Inches) | 2.4 x 5.3 x 6.8 | 1.18 x 1.57 x 15.75 |
| Drivers | ||
| Driver Size (mm) | 32 | 14.2 |
| Driver Type | Dynamic | — |
| Number Of Drivers (per Piece) | 1 | 1 |
| Microphone | ||
| Type | MEMS | — |
| Beamforming Support | Yes | — |
| Number Of Mics | 3 | 2 |
| Built-in Microphone | Yes | Yes |
The main differences center around storage capacity, form factor, and convenience. The Sennheiser PXC 550-II provides extensive bulk storage capacity best suited for homes, garages, or basements needing deep freeze space. In contrast, the Bowers & Wilkins PI4 offers a compact upright design that fits into smaller spaces with convenient shelf organization.
Chest-style freezers generally excel in thermal efficiency because cold air naturally settles at the bottom and does not escape when the lid is lifted. Compact upright models have lower total kilowatt-hour usage simply due to their smaller cubic volume, making both designs efficient for their respective intended purposes.
Both products are available through official brand stores and authorized retailers with full manufacturer warranties and fast delivery options. Click the "Check Best Price" buttons in the comparison cards above to view today's latest promotions, official deals, and current availability.
Measure your available floor clearance first. If you have open space in a garage, basement, or utility room and want to freeze items in bulk, choose the Sennheiser PXC 550-II. If you have limited room in a kitchen, apartment, dorm, or office and prefer easy eye-level access to items, choose the Bowers & Wilkins PI4.