TODD'S BEATS

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A compact 2-way bookshelf speaker with a 1-inch titanium dome tweeter and a 5.25-inch woven carbon fibre woofer. PSB lists a frequency response of 45Hz to 23,000Hz (on axis, ±3dB) and a rear-facing slot port. Sold as a pair in Satin Black or Satin White.

PSB describes the Imagine B50 as a compact bookshelf speaker with true-to-nature sound and bass that belies its size. It says the B50 can be used in multi-channel or surround setups on AST-25 floor stands.

Design

2-way, bass reflex, rear slot port

Drivers

1" tweeter, 5.25" woofer

Frequency response

45 - 23,000Hz (on axis, ±3dB)

Sensitivity

85dB anechoic, 87dB in room

Impedance

8 ohms nominal, 4 ohms minimum

Size (W × H × D)

171 × 300 × 251 mm

Why you will love it

Tweeter and woofer

The B50 pairs a 1-inch (25mm) titanium dome tweeter with ferrofluid and a neodymium magnet with a 5.25-inch (133mm) woven carbon fibre woofer with a rubber surround. The crossover is at 2,200Hz (LR4).

PSB says the 2-way bass reflex design with a rear-facing slot port delivers bass well beyond what the cabinet size suggests.

PSB Imagine B50 bookshelf speaker pair in white

Placement flexibility

PSB says the components are built for placement flexibility, wider bandwidth, higher output, efficiency, power handling and low distortion. It recommends 20 to 150 watts of amplifier power and lists 150 watts of program power.

Sensitivity is 85dB in an anechoic chamber and 87dB in a listening room. Impedance is 8 ohms nominal with a 4 ohm minimum.

Design and connections

PSB describes a slim, compact cabinet in Satin Black or Satin White, with aluminium trim and chamfered edges that match the PWM Series.

There are dual 5-way gold-plated binding posts with gold-plated jumpers, and the speaker is bi-wireable and bi-ampable. Black bumpers are fitted for shelf use.

PSB Imagine B50 bookshelf speaker pair in black

Is it right for you?

A great fit if you…

Want a compact speaker for stereo music on a shelf or stand
Want a front or surround pair for a home theatre
Like the look of the PSB PWM Series and want speakers that match
Have an amplifier or receiver that is comfortable at 4 ohms

Worth knowing

Sold as a pair
Each speaker is about 30 cm tall and weighs 5.13kg net
PSB mentions AST-25 floor stands for surround use
The slot port faces the rear, so allow some space behind the speakers

Build your system

Add an amplifier or receiver, and a subwoofer for more low end.

Matching tower: See the PSB Imagine T54 tower speakers from the same range
Subwoofer: Add a PSB Alpha S8 subwoofer or browse subwoofers
Stands: Browse speaker stands
Amplifier: Drive them from a stereo amplifier
Receiver: Or use an AV receiver for home theatre

Specifications

Performance

Frequency response, on axis 0° ±3dB	45 - 23,000Hz
Frequency response, on axis 0° ±1.5dB	60 - 20,000Hz
Frequency response, off axis 30° ±1.5dB	60 - 10,000Hz
LF cutoff (-10dB)	36Hz
Sensitivity (anechoic / listening room)	85dB / 87dB
Impedance	8 ohms nominal, 4 ohms minimum
Recommended amplifier power	20 - 150 watts
Program power	150 watts

Acoustic design

Tweeter	1" (25mm) titanium dome with ferrofluid, neodymium magnet
Woofer	5.25" (133mm) woven carbon fibre cone, rubber surround
Crossover	2,200Hz, LR4
Design type	2-way bass reflex, rear slot port

Physical

Dimensions (W × H × D)	171 × 300 × 251 mm
Weight	5.13kg net each
Finish	Satin Black or Satin White
Features	Dual 5-way gold-plated binding posts, bi-wireable and bi-ampable, rear-facing slot port, black bumpers, gold-plated jumpers

Specifications from PSB Speakers' Imagine B50 Bookshelf page, checked November 2026. PSB says specifications are subject to change without notice.

Questions people ask

Are the B50 speakers sold as a pair?

Yes. The listing is for a pair.

What drivers does it use?

A 1-inch titanium dome tweeter and a 5.25-inch woven carbon fibre woofer.

How low does it go?

PSB lists 45Hz on axis (±3dB) and a -10dB cutoff of 36Hz.

Can I use them for surround sound?

PSB says the B50 can be used in multi-channel or surround setups, placed on AST-25 floor stands.

Can I bi-wire or bi-amp it?

Yes. PSB lists dual 5-way gold-plated binding posts and says it is bi-wireable and bi-ampable.

What finishes are available?

Satin Black and Satin White.