Alpha T20 Tower

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A Symphony of Sound

The Alpha T20 Tower Speaker is the pinnacle of the Alpha Series, delivering a blend of exquisite performance and stylish design. It's designed to fill any room with lush, full-bodied sound. Enjoy an immersive listening journey with smooth transitions, impactful bass and unmatched clarity.

Customer Reviews

Customer Reviews
  1. Efficiency, smooth highs, and lots of great bass.
    Posted on
    Build Quality
    Sound Quality
    A couple of months ago I decided to buy some very efficient speakers for a new 10 watt tube amp. Not an easy thing to do. I saw that PSB had T-20 towers (90 db) for a very reasonable price. I decided to buy them till I could find a much better more expensive pair. I’ve since then been using them everyday. I’m so surprised of how good they are for that price range. They are good enough for serious listening with lots of bass. I will not be buying a better pair, and hope to have these for a long time. Keep up the good work!

    Review by

  2. Amazing
    Posted on
    Build Quality
    Sound Quality
    Just bought these Dec 2 2023 they arrived fast by Dec 8. After getting them all set up with the amp I put them to the test with some heavy base music such as Tone Loc, Funky Cold Medina and Notorious B.I.G Hypnotize. Wow did they ever perform clean rich sound no problem with heavy base and sound fantastic.
    This is my second set of PSB speakers my first set were Alpha A/V bookshelf speakers, I got 22 years out of them until one of the subs went kids eh. I asked staff at PSB if they could help me source some new subs for my old speakers and they were very helpful. Very satisfied all the way around, I'd recommend these to anyone and would buy PSB again without question!

    Review by

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More Information
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Frequency Response

On Axis @ 0° ±3dB 36 - 21,000Hz
On Axis @ 0° ±1 1/2dB

54 - 20,000Hz

Off Axis @ 30° ±1 1/2dB

54 - 10,000Hz

LF Cutoff -10dB



Anechoic Chamber 88dB
Listening Room 90dB


Nominal 8 Ohms
Minimum 6 Ohms

Input Power

Recommended 15 - 120 Watts
Program 60 Watts

Acoustic Design

Tweeter (Nominal) 3/4” (19mm)
Black Anodized Aluminium Dome with
Ferrofluid and Neodymium Magnet
Woofer (Nominal) 2 x 5 1/4” (133mm)
Textured Polypropylene Cone
with Rubber Surround
Crossover 2,500Hz, L4
Internal Volume 0.95 cu ft (27.0L)
Design Type Tuned Port Bass Reflex,
2 1/2” (63.5mm) Rear Port

Dimensions / Weights / Finish

Size (W x H x D)

6 3/4” x 32 1/2” x 9 3/8” *
(170 x 825 x 243mm)


26.15lb (11.9kg)/each
62.7lb (28.5kg)/pr


Black Ash


* Non-metric measurements are approximate.
** Some finishes may not be available in all models and/or all countries.
All specifications are subject to change without notice.


Data Sheet
Owner's Manual