JBL Synthesis SCL-4 In-Wall Speaker

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Model: SCL4 UPC: 050036330398 Item: 171345

JBL Synthesis SCL-4 In-Wall Speaker Overview

With the Synthesis surround system – a direct descendant of the Pro Cinema industrial line – JBL redefines the home cinematic experience. Individually, the components of the custom line are exemplary enough to fit into any top-shelf installation. But together, JBL’s Synthesis speakers and electronics form a single, scalable end-to-end solution designed to transform any size or shape environment into an unparalleled soundstage. The SCL-4 in-wall speaker is ideal in any location – as front, center, surround or overhead. This flush-mount marvel starts with a 7-inch Advanced Aluminum Matrix cone woofer with efficient, low-distortion neodymium magnet structure, for wide dynamic range and extended low frequencies. The 1-inch compression tweeter features a Teonex diaphragm firing through a geometrically precise, patented High Definition Imaging waveguide horn for accurate localization and dispersion. The flush-mount installation with magnetic, paintable white grille disappears in any room, and the sealed in-wall wood enclosure provides proper acoustic isolation. Mix and match the SCL-4 with its Synthesis siblings SCL-2s and SCL-3s, plus a superior sub such as the S2S-EX, for a sonic signature that satisfies the most discerning ear.

Product Information

Product highlights

  • 7-inch cast-frame, aluminum matrix woofer with neodymium motor for high efficiency and wide dynamic range
  • 1-inch Teonex compression tweeter with integrated HDI waveguide horn for maximum dispersion and accurate localization
  • Mountable in any orientation, ideal in any surround location, from front to surround to Atmos above
  • Sonic signature complements other speakers in JBL Synthesis line
  • Sealed MDF wood in-wall enclosure for optimal acoustic performance
  • Matte-black molded baffle with zero-bezel white paintable grille
  • Bi-amp or bi-wire capabilities with dual gold-plated binding posts
  • Maximum 200 watts continuous @ 6 ohms
  • Installation dimensions: 25" high x 16.1" wide x 3.7" deep
  • Weight: 27.6 lbs.
  • Warranty: 5 years – World Wide Stereo is an authorized dealer for every brand we sell
  • Included: World Wide Stereo 60-day guarantee and expert product support

Maximum sound

The entire JBL Synthesis line is designed for fine reproduction. The SCL-4 starts with a 7-inch woofer with rugged cast frame, a cone of Advanced Aluminum Matrix material for low-mass stiffness, and powerful neodymium magnet assembly for reduced distortion and high power-handling capability. And with a power capacity of 200 watts, the SCL-4 supplies the wide dynamic range that today’s cinema soundtracks demand.

Maximum soundstage

JBL’s unique 1-inch compression tweeter, derived from its professional D2 design, has a diaphragm of tough, durable Teonex polyester film. It fires out via a patented High Definition Imaging (HDI) waveguide horn, of the type found in JBL’s professional monitors, for maximum controlled dispersion and pinpoint soundstaging.

Maximum flexibility

The SCL-4 can be mounted in any orientation, and plays well at just about any position, from left-right mains to over-the-head Atmos. And the paintable magnetic grille means the SCL-4 blends into any décor, or disappears when installed, sans grille, behind an acoustically transparent projection screen.

Maximum synergy

The SCL-4 stands alone in any fine home theater setup. But it really shines when combined with the similarly sonic-signatured SCL-2s and SCL-3s, and one or more S2S-EX subwoofers. And when you build a custom, scalable Synthesis system, adding in the extravagant SDA-4600 multichannel amp, SDEC-4500P equalizer, and SDP-75 16- to 32-channel digital surround processor – oh my, you have to hear to believe.

Listen and be amazed

We at World Wide urge you to stop in if you’re in the neighborhood of our Ardmore, PA showroom, for a theatrical demonstration of the full Synthesis system. It’s guaranteed to leave you breathless. And as always, you can count on our unmatched product support and 60-day guarantee.

WWS: What we say

“It’s a different experience. There’s watching television, there’s going to the movie theaters, then watching theater in a JBL Synthesis room is the next level up. It’s that much of a difference, better than a theater by far.” – Robert Marcoccia, World Wide Stereo Ardmore Sales & Systems Designer

Prop 65 Warning

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.



  • Speaker type: 2-way in-wall loudspeaker
  • Low frequency transducer: 7" cast-frame, advanced aluminum matrix cone woofer
  • Mid/High frequency transducer: D2-derived 1" 2409H annular ring, Teonex diaphragm compression driver
  • Maximum recommended amplifier power: 200W RMS
  • Frequency response (-6dB on-axis): 45Hz - 33kHz
  • Coverage area (-6dB @ 20kHz): 100 x 100 degrees (horizontal x vertical)
  • Sensitivity (2.83V @ 1m): 91dB
  • Nominal impedance: 6 ohms
  • Crossover frequencies: 1.3kHz
  • Enclosure type: Sealed in-wall mount with included back box
  • Inputs: Dual gold-plated five-way binding posts
  • Dimensions (H x W x D): 25" x 16.1" x 3.7"
  • Weight: 27.6 lbs.

What's in the Box

What's in the Box:

  • SCL-3 In-Wall Speaker
  • JBL logo set
  • 2x Center baffle screw
  • 13x Baffle screws
  • Set of 4 security plates
  • Grille
  • User manual
  • Back box with mounting brackets attached



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Prop 65 Warning

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.