Magnetic Shielding in Modern Audio: Are PSB In-Wall Speakers Magnetically Shielded?
Most modern PSB in-wall speakers, including the popular Performance and Custom series, are not traditionally magnetically shielded because modern LED, LCD, and OLED displays are not susceptible to magnetic interference. While older PSB Q-LCR in-wall speakers were designed with tighter magnetic flux control, the industry-wide shift away from CRT (Cathode Ray Tube) televisions has made heavy shielding unnecessary for 99% of home theater installations.
Key Takeaways for Homeowners
- Modern Compatibility: PSB speakers are perfectly safe to use alongside all modern flat-panel televisions (OLED, QLED, LED).
- Magnetic Flux: High-quality motor structures in the PSB Q-LCR and W-LCR models naturally contain most magnetic energy within the gap.
- Legacy Tech: Shielding is only required if you are placing speakers within inches of a legacy CRT monitor or extremely sensitive laboratory equipment.
- Installation Focus: Prioritize wall cavity depth and acoustic decoupling over magnetic concerns for the best performance.
The Evolution of Magnetic Shielding in PSB Speakers
In my years of designing high-end home theaters, the question “are psb in wall speakers magnetically shielded” has shifted from a critical technical requirement to a legacy curiosity. In the 1990s and early 2000s, the powerful magnets in high-fidelity speakers like those from PSB would distort the electron beam in CRT televisions, causing “rainbowing” or permanent screen damage.
Today, PSB Speakers, led by founder Paul Barton, focuses on acoustic linearity and “True-to-Nature” sound rather than adding heavy, performance-dampening metal shields. Adding a bucking magnet or a steel can to a speaker often alters the Q-factor of the driver, potentially muddying the mid-range frequencies that PSB is famous for.
Why Shielding is Rare Today
- Display Technology: OLED and LCD panels use light-emitting diodes or liquid crystals that are entirely unaffected by static magnetic fields.
- Driver Efficiency: Modern neodymium magnets are smaller and more efficient, concentrating the magnetic field more tightly than older large-format ferrite magnets.
- Signal Integrity: Removing shielding allows for better heat dissipation from the voice coil, improving the long-term reliability of your PSB in-wall investment.
Analyzing Specific Models: Are PSB Q-LCR In-Wall Speakers Magnetically Shielded?
When clients ask “are psb q-lcr in wall speakers magnetically shielded,” they are often looking at high-performance LCR (Left, Center, Right) configurations. The PSB Custom Sound (CS) series and the QuietLine (Q) series were engineered during a transition period in display technology.
While the PSB Q-LCR features a sophisticated motor structure, it does not carry a “fully shielded” certification. However, we have tested these units extensively in “near-field” configurations. Even when placed within 4 inches of sensitive electronics, the stray magnetic field is negligible.
PSB In-Wall Model Comparison Table
| Model Series | Ideal Application | Magnet Type | Shielded? | Key Benefit |
|---|---|---|---|---|
| PSB W-LCR | High-end Home Theater | Neodymium | No | Shallow 3.75″ depth |
| PSB Q-LCR | Critical Listening | Ferrite/Hybrid | Partial | High Power Handling |
| PSB CS610 | Multi-room Audio | Ferrite | No | Cost-effective / E-Z mounting |
| PSB CS650 | Premium Atmos/Surround | Neodymium | No | Carbon Fiber Woofer |
Step-by-Step Installation Guide for PSB In-Wall Speakers
Installing PSB in-wall speakers requires precision to ensure that the unshielded magnets do not vibrate against internal wall components. Follow this professional workflow for the best results.
Step 1: Pre-Installation Site Survey
Before cutting drywall, use a high-quality stud finder to map out the 16-inch-on-center studs. Ensure there are no metal pipes or electrical conduits within 6 inches of the intended mounting hole.
- Expert Tip: If you are mounting near a security system keypad or a mechanical hard drive storage array, maintain at least 12 inches of clearance to avoid any potential (though unlikely) magnetic interference.
Step 2: Cutting the Aperture
Use the provided PSB cutout template. Trace the outline with a pencil and use a manual drywall saw for better control than a power tool.
- Safety Check: We always suggest “probing” the wall with a small wire through a pilot hole to ensure no hidden obstructions exist behind the drywall.
Step 3: Managing the Acoustic Environment
Since PSB in-wall speakers like the W-LCR2 are open-back or tuned for specific volumes, consider adding R-13 fiberglass insulation behind the speaker. This reduces “back-wave” reflections and improves the bass response.
Step 4: Wiring and Connection
Use CL3-rated 14-gauge speaker wire for runs under 50 feet. For longer runs, upgrade to 12-gauge wire. Strip approximately 1/2 inch of insulation and ensure the gold-plated binding posts on the PSB speaker are tightened firmly.
Step 5: Engaging the Dog-Ear Brackets
Insert the speaker into the hole. Using a manual screwdriver (avoid high-torque drills to prevent cracking the plastic flange), tighten the dog-ear mounting brackets. These brackets will sandwich the drywall, creating a rigid acoustic seal.
Understanding Magnetic Flux and Placement Risks
Even though PSB in-wall speakers are safe for modern TVs, “stray flux” is a real physical phenomenon. In our testing at various installation sites, we have identified specific (though rare) scenarios where magnetic fields still matter.
Where You Should Still Be Cautious
- Analog Media Storage: Do not store high-bias cassette tapes or reel-to-reel tapes directly behind a wall where a PSB CS610 is mounted.
- Mechanical Compasses: If you are installing these in a luxury marine vessel or an aircraft hanger environment, the magnetic pull can deflect sensitive analog navigation gear.
- Medical Equipment: Pacemakers and sensitive medical monitoring tools should remain at least 2 feet away from the high-performance magnets found in the PSB Performance series.
The “Paul Barton” Sound: Why Magnets Matter
The reason PSB doesn’t prioritize shielding is simple: Sound Quality. Paul Barton conducts his research at the National Research Council (NRC) in Canada. His findings suggest that the most important factor for an in-wall speaker is its off-axis response and its ability to vanish into the room’s acoustics.
By using high-strength, unshielded magnets, PSB achieves:
- Faster Transient Response: The woofer can start and stop more quickly, leading to “tight” bass.
- Higher Sensitivity: You need less amplifier power to reach cinematic volume levels.
- Reduced Distortion: A cleaner magnetic gap results in less “shouty” midrange performance.
FAQ: Common Questions About PSB Magnetic Shielding
Will a PSB in-wall speaker erase my credit cards?
No. Unless you physically rub your credit card’s magnetic strip directly against the raw magnet on the back of the speaker, the magnetic field strength drops off too quickly to affect cards through a layer of drywall and a plastic speaker grille.
Can I place my PSB Q-LCR directly under my OLED TV?
Absolutely. We have installed hundreds of PSB Q-LCR in-wall speakers directly beneath LG and Sony OLED panels. There is zero risk of color distortion, “ghosting,” or panel degradation because OLEDs do not rely on electron beams.
What should I do if I still have an old CRT Sony Trinitron?
If you are a retro-gaming enthusiast using a CRT, you should maintain at least 2-3 feet of distance between the screen and a PSB in-wall speaker. If you notice purple or green spotting on the corners of your CRT, move the speaker further away or use a “degaussing” coil on the TV.
Do the grilles provide any magnetic shielding?
No. The metal grilles provided with PSB speakers are acoustically transparent and made of thin perforated steel or aluminum. While they are held in place by small magnets on some models, they do not block the magnetic field produced by the large driver motor.
Are there any PSB models that ARE fully shielded?
Most legacy bookshelf models (like the Alpha series) had shielded versions. However, in the current In-Wall/In-Ceiling lineup, “Magnetic Shielding” is no longer a listed specification because it is no longer a requirement for modern home integration.
