Pioneer CST LCR 5.25" In-Wall Speaker (Each)

  • Coherent Source Transducer (CST) Technology
  • 1.5" Aluminum Tweeter
  • 5.25" Mica-filled IMPP Woofer (2)
  • 120 Watt Power Handling*
  • 5 Year Limited Warranty


Creating the ultimate home theater experience demands a level of performance that goes beyond the conventional.

That pursuit of perfection has always been a mission for our professional and Elite lines, and the results of that pursuit can now be experienced with our Pioneer CST line as well.

With the immediate installation benefit of virtually disappearing into any environment, the quality of the sound that follows certainly makes its presence known.

And with Coherent Source Transducer (CST) driver technology offering an even wider “sweet spot” than competing pivoting driver designs, a more consistent and uniform auditory experience is now possible for any home theater.

With a smoother response and greater vocal clarity found in its 3-way design and high performance materials, the S-IW551L brings you even closer to the ultimate home theater experience in a form factor designed to be used in front left/center/right installation.

Featuring CST technology and anchored by two 5.25”mica-filled Injected Molded Polypropylene (IMPP) woofers, a 6.5” mica-filled IMPP midrange and a 1.5” aluminum tweeter, this model also includes a thermal resetting protection circuit for a stable home theater application. Add a treble control and the resulting experience is delivered to perfection.


All Architectural Loudspeakers are backed by a 5 year limited warranty. Details are provided on the Limited Warranty Sheet included with the product.