C-SUR – In-Ceiling Speaker

One speaker, multiple applications

Like all PSB speakers, the CustomSound C-SUR is prized for its true-to-nature sound. It is also highly versatile, offering several placement options for creating an immersive home theatre experience. Capable of handling 150 watts of amplifier power, the C-SUR is the robust yet discreet in-ceiling speaker your high-end home theatre system deserves.

  • Two 5¼” (133mm) clay/ceramic reinforced polypropylene cone woofers
  • Two 1″ (25mm) titanium-done, ferrofluid-cooled tweeters

Bring big sound to small rooms
The CustomSound C-SUR in-ceiling speaker uses two 5¼” (133mm) woofers and two 1″ (25mm) tweeters in a unique 5.1/7.1 dual-mode configuration that allows for an unusual installation option. Because each woofer/tweeter pair has its own crossover and input, a single C-SUR can be used for both the surround and surround-back channels, providing an ideal solution for a 7.1 theatre in smaller rooms.

Create the ideal soundstage
The CustomSound C-SUR is also an excellent height-channel speaker because of its diffuse soundfield. This speaker helps pull the sound “off the walls” to create a truly immersive experience. Combine the C-SUR with other speakers in the CustomSound line, such as the C-LCR and W-LCR2, to create a superb home theatre surround sound system.

Designed for acoustic integrity
Housed inside a meticulously engineered enclosure that ensures the acoustic integrity of the design in any installation, the CustomSound C-SUR is uncompromising in its performance, both visually and sonically. As an added benefit, the enclosure reduces sound transmission into adjoining rooms. This is the concealed-speaker system your home is waiting for.

  • Two 5¼” (133mm) clay/ceramic reinforced polypropylene cone woofers
  • Two 1″ (25mm) titanium done, ferrofluid-cooled tweeters
  • Frequency response: 70-23,000Hz (±3dB)
  • Dual-input design features dedicated speaker-wire inputs for each woofer and tweeter pair
  • Includes magnetic “frameless” grille with fabric scrim

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More Information
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Frequency Response

On Axis @ 0° ±3dB 70-23,000Hz
On Axis @ 0° ±1 1/2dB


LF Cutoff -10dB 65Hz


Anechoic Chamber 89dB
Listening Room



Nominal 6 Ohms

4 Ohms

Input Power

Recommended 20 - 150 Watts

150 Watts

Acoustic Design

Tweeter (Nominal)

2 x 1” (25mm) Titanium Dome with Ferrofluid

Woofer (Nominal)

2 x 5 1/4” (133mm) Clay/Ceramic reinforced Polypropylene Cone

Rubber Surround


1500Hz, LR4

Internal Volume

0.4 cu ft (11.2L)

Design Type


Dimensions / Weights / Finish

Size (W x H x D)

Cutout Dimensions - 13 3/16 x 13 3/16” * (335 x 335mm)

Mounting Depth - 7 3/4” * (196mm) *

Grille Dimensions - 14 3/4 x 14 3/4 x 3/8” * (373 x 373 x 7mm)

Net Weight

Net - 17.6lb (8.8kg)/each

Shipping - 24lb (10.9kg)/each




* Non-metric measurements are approximate.

All specifications are subject to change without notice.


Owners Manual - English

Owners Manual (English) (PDF) (7.05 MB)

Owners Manual - Russian

Owners Manual (Russian) (PDF) (7.11 MB)

Owners Manual - Spanish

Owners Manual (Spanish) (PDF) (7.03 MB)

Owners Manual - German

Owners Manual (German) (PDF) (7.03 MB)

Owners Manual - Italian

Owners Manual (Italian) (PDF) (7.03 MB)

Owners Manual - Portuguese

Owners Manual (Portuguese) (PDF) (7.03 MB)

Owners Manual - Dutch

Owners Manual (Dutch) (PDF) (7.03 MB)

Owners Manual - French

Owners Manual (French) (PDF) (7.03 MB)

Quick Start Guide

PSB CustomSound Series QSG (PDF) (1.99 MB)