CST56 Refurbished

Proprietary, dual 5" (130mm) PolyPlas™ woofers

Stiffer cones deliver more uniform pistonic motion for deeper, tighter bass and improved midrange tones. PolyPlas™ coating gives the JBL® CST56’s cones maximum-impact JBL® audio. You’ll experience serious, feel-it-in-your-bones bass and cinema sound that does justice to a great HDTV picture.

A massive JBL® HeatScape™ motor structure

The HeatScape™ motor structure envelops the JBL® CST56’s voice coil with a large ceramic magnet and a steel frame. It protects the voice coil by dissipating heat away from it to increase power handling and give you extremely low levels of harmonic distortion.

Titanium-laminate dome tweeter

The JBL® CST56’s thin but rigid titanium-laminate tweeter delivers accurate high-frequency response, even when the volume is way up. The end result is full, clear, tight reproduction of sound. And there’s a seamless transition between the middle and high frequencies.


CST56 Elliptical Oblate SpheroidalTM (EOS) waveguides - Image

Elliptical Oblate SpheroidalTM (EOS) waveguides

Elliptical Oblate Spheroidal TM (EOS) waveguides, originally developed for JBL® Professional LSR studio monitors, disperse the JBL® CST56’s clean high-frequency sound precisely across a wide listening area. There’s no “sweet spot.” Sit wherever you want.

CST56 Proprietary Straight-Line Signal Path™ (SSP) crossover design - Image

Proprietary Straight-Line Signal Path™ (SSP) crossover design

By providing the shortest possible route from the input terminals to the transducers, the JBL® CST56’s proprietary crossover design minimizes noise and signal loss. So you’ll hear everything your TV and music sources can dish out.

CST56 Accurate frequency response - Image

Accurate frequency response

At 55Hz to 30kHz, with 90dB sensitivity, nothing is over- or under-emphasized by the JBL® CST56. You get a true, full sound range from deep bass tones to ultrahigh frequencies.

CST56 Cinema Sound performance - Image

Cinema Sound performance

With 50 watts of continuous power handling and 300 peak, the JBL® CST56 performs like a pro. It uses technology derived directly from JBL® Professional products and gives your home theater audio the unparalleled spaciousness and definition it wants.

CST56 Magnetically shielded speakers for video proximity - Image

Magnetically shielded speakers for video proximity

Put the JBL® CST56 anywhere that makes sense in your home theater setup. It’s magnetically shielded for placement on the floor wherever you want, including right near your TV or video display.

Specs & Downloads

Item# CST56-Z


The JBL® Cinema Sound CST56 looks great with the latest flat-screen and plasma television sets: silver enclosure, high-gloss black front panel, black grille. But the big deal is how it integrates and completes your experience, pounding out big, crisp, clear, glorious audio that’s worthy of today’s high-definition pictures. JBL® Professional audio standards come home in this speaker, with proprietary technology like PolyPlas™ reinforced woofers and titanium-laminate tweeters mounted in Elliptical Oblate Spheroidal™ waveguides. And that’s just the start. Your favorite music and movies will have sound that washes over you, as its creators intended.

General Specifications

Cinema Sound Series

Audio Specifications

(2.83V@1m) 90dB
Power Handling (Recommended)
Frequency Response
(-6dB) 55Hz-30kHz
Maximum Recommended Amplifier Power
Power Handling (Peak)
Nominal Impedance
8 ohms

Speaker Specifications

High-Frequncy Transducer
3/4" (19mm) titanium-laminate dome, video shielded
Low-Frequency Transducer
Dual 5" (130mm) transducers with PolyPlas cones, neodymium magnets and HeatScape motor structure, video-shielded


Weight (lb)
Width (in)
Depth (mm)
Height (in)
Weight (kg)
Width (mm)
Depth (in)
Height (mm)

Documents & Downloads

Reviews and Q&A

Customer Reviews

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Product Q&A

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