Pioneer CST 8" In-Wall Speaker (Pair)

  • Coherent Source Transducer (CST) Technology
  • 1.5" Aluminum Tweeter
  • 8" Mica-filled IMPP Woofer
  • 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.

Designed to be used in home theater and distributed audio applications, the S-IW851-LR features our CST driver technology comprised of a 1.5” aluminum tweeter and 8” mica-filled Injection Molded Polypropylene (IMPP) woofer. Also included is a self-resetting protection circuit plus the added installation flexibility of treble and bass contour controls.


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