PSB Alpha T20 Tower Speakers

A Ferrofluid-Cooled Tweeter, Tuned for an Entry-Level Tower

The PSB Alpha T20 is a 2-way floorstanding tower built around a 0.75-inch black anodized aluminum dome tweeter and two 5.25-inch textured polypropylene woofers, crossing over at 2,500 Hz through a 4th-order Linkwitz-Riley filter.

PSB rates sensitivity at 88 dB anechoic (90 dB in a real listening room), and recommends amplifiers between 15 and 120 watts into an 8-ohm nominal load (6 ohms minimum).

The cabinet is available in Black Ash or Walnut, and is sold as a matched pair, ready for stereo right out of the box, with no second speaker to hunt down or add to your order.

Where the Ferrofluid-Cooled Tweeter Earns Its Keep

A Ferrofluid-Cooled Dome Above Twin Textured Woofers

The 0.75-inch tweeter's ferrofluid cooling and neodymium magnet let it run cooler at high output, holding onto detail instead of compressing as the volume climbs toward the top of its rated range.

Below 2,500 Hz, two 5.25-inch woofers with a textured polypropylene cone and rubber surround take over, moving the air an entry-level tower needs for real, satisfying bass output, no separate subwoofer required.

The Numbers, and What They Ask of Your Amplifier

PSB quotes a frequency response of 36 Hz to 21 kHz at ±3dB (54 Hz to 20 kHz at ±1.5dB). Sensitivity is 88 dB anechoic, nominal impedance is 8 ohms (6 ohms minimum), and recommended amplifier power is 15 to 120 watts.

The cabinet is rear-ported with a 2.5-inch tuned bass reflex port. At just over 26 pounds each (63 pounds per pair), the T20 is easy to move into position on its own.

Who Is This Floorstanding Speaker Best For?

• You want a genuine award-winning entry tower — a The Absolute Sound 2025 Editors' Choice
• You want a tweeter built to hold its composure at real volume — ferrofluid cooling and a neodymium magnet resist compression as output climbs
• You want a real choice of finishes — Black Ash or Walnut, both ready to match a real room
• Your amplifier delivers a modest, easy-to-drive amount of power — 88 dB sensitivity into an 8-ohm load suits amplifiers between 15 and 120 watts
• You want real floorstanding bass without a separate subwoofer — the T20 reaches to 36 Hz on its own. For the deepest home-theater effects, add one of our subwoofers and let the towers do what they do best

How Does It Connect to Your System?

Connect each tower to an amplifier or receiver's speaker outputs using the binding posts on the rear panel. An 8-ohm nominal load (6 ohms minimum) suits amplifiers rated between 15 and 120 watts.

Since the cabinet is rear-ported, leave a few inches of clearance behind each tower before settling on a final position.

Two cables, two speakers, and you are listening.

Pairs Well With

What finishes the system around a pair of Alpha T20 towers:

• Integrated amplifiers — an easy 8-ohm load most integrated amps drive comfortably
• Stereo amplifiers — for even more headroom above the recommended range
• Speaker cables — connect to the rear binding posts
• Audio racks — house the electronics driving an award-winning tower

Frequently Asked Questions

Is the price for one speaker or a pair?

The Alpha T20 is sold as a pair — the listed price is for two towers, ready for stereo.

How much amplifier power do I need?

PSB recommends amplifiers between 15 and 120 watts. At 88 dB sensitivity into an 8-ohm load, most integrated amps and receivers in that range drive it comfortably.

How far from the wall should I place them?

Since the cabinet is rear-ported, give each tower some room behind it. Moving it closer to the wall adds bass warmth; pulling it out tightens and tames the low end.

What finishes are available?

Black Ash or Walnut, both real wood-grain finishes ready to match a real room.

What does the Editors' Choice award mean?

The Absolute Sound named the Alpha T20 a 2025 Editors' Choice, the magazine's recognition for gear its editors found worth recommending without reservation.

Do I need a subwoofer with these speakers?

Not necessarily. The T20 reaches to 36 Hz on its own, though a subwoofer can still add reach for home theater use.

Why Audio Advisor?

• 40+ Years of Expertise — Since 1981, we've helped over a million music lovers find the right gear.
• 60-Day Money-Back Guarantee — Take your time. Listen, enjoy, and make sure it's right for you.
• Real Experts, Real Help — Our team is here to answer your questions at 800-942-0220, weekdays 9am–6pm EST.
• Free Shipping — On orders over $49, delivered to your door.
• Flexible Payment Options — Financing available so you can start listening now.

Learn More

Want to learn more about speaker placement, amplifier matching, or getting the most from a floorstanding tower? Visit our Learning Center for guides, tips, and expert advice.