Plays Well With OthersThe R-40PM powered speakers connect via Bluetooth for music streaming, phono (with ground screw terminal) for turntables, plus digital and analog for everything in between. And because Klipsch engineers built in a customized amplifier, you get perfectly tuned sound experiences - no audio/video receiver (AVR) required.Bigger Horn, Wider SoundstageExperience legendary Klipsch Reference sound with larger edge-to-edge Tractrix horns mated to 1" aluminum LTS tweeters for a wider listening area and perfect clarity. Crank up the volume without compromising sound quality and tell your neighbors we're not sorry!Happiness Is Copper And BlackThe R-40PM's copper-spun TCP woofers use steeply angled cones for improved rigidity and accuracy. Low-profile magnetic grilles give you flexibility to show off the classic Klipsch cones or switch things up with a sleek black exterior.Linear Travel Suspension (LTS) Aluminum TweeterA hallmark of Klipsch speakers, the exclusive 1" LTS aluminum tweeter with Kapton Suspension minimizes distortion for more detailed performances. Aluminum is an extremely light and rigid material used in the tweeter assembly to provide high efficiency.All Of The Inputs, None Of The FussPlug & Play SetupBasking in the glow of your favorite movies, games, and albums doesn't have to be complicated. Plug your R-40PMs into a power outlet, then each other, and add any additional lines you'd like (or simply stream via Bluetooth).Small But MightyThe R-40PMs feature a small but mighty cabinet that can produce bass as deep as 60Hz thanks to bass-reflex rear-firing ports. Expertly engineered with extra cabinet depth, you'll experience warmer, more impactful sound without connecting to a sub, but...Got Bass On The Brain We've included an RCA line level output on the R-40PMs so you can add a subwoofer to your stereo system to enhance low frequencies even further.