Definitive Technology STUDIOMONITOR-55 BookShelf Loudspeaker. FREE SHIPPING!

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Definitive Technology STUDIOMONITOR-55 BookShelf Loudspeaker. FREE SHIPPING!
Definitive Technology StudioMonitor 55 7.88" Ultra-Performance Shelf or Stand Monitor Loudspeaker with second generation patented 5-1/4" BDSS mid/bass drivers with Linear Response Waveguide technology for flat, accurate response with micro-detail retrieval and three-dimensional


Each SM 55 features a D'Appolito array consisting of two cast-basket 6-1/2" (17cm) second generation BDSS midrange drivers surrounding a 1" (25mm) pure aluminum dome tweeter. The drivers feature Definitive's patented Balanced Double Surround System (BDSS) technology that supports the speaker cone at both the inner and outer edges allowing longer, more linear excursion for greater clarity and finely textured inner detail. A new patent pending Linear Response Waveguide™ smoothes off-axis frequency response and disperses sound over a wider area for crystal clear intelligibility for every listener in the room. The tweeter is a pure aluminum dome, which has been heat-treated to relax the crystal structure and then coated with a ceramic to produce extended highs that reveal nuance and shimmer without a trace of edginess.

Slim Elegant Styling with Rambo-Like Brawn 
  • All the driver and crossover technology in the world would be wasted if housed in a resonance-prone box. We devoted as much Design and Engineering attention to the styling and construction of the StudioMonitor 55's enclosure as any other part of its design
  • The specially shaped high gloss baffle around the drivers and the tapered enclosure sides enhance sound quality by minimizing diffraction distortion. The decorative high gloss grille and cabinet accents add elegance to the matte black tower the way satin piping adds dash to a tuxedo
  • But the enclosure's most important job is to be totally inert and resonance free so as not to color the sound. And that's just we did in engineering the SM enclosures. Internal MDF cross braces further stiffen the system. Tap on the side panel of a StudioMonitor 65 enclosure to hear the solid "thud" of a solid, well-damped cabinet instead of the hollow ring of a poorly constructed speaker
Phase-Coherent Crossover Networks
  • The crossover network is the real heart of a loudspeaker as it is responsible for perfectly blending together the sound of the various drivers into a musically seamless whole. The sophisticated design used in the SM55 features premium audiophile-grade components such as oversized inductors, Mylar capacitors for linear phase and frequency response. An integrated Zobel network flattens the impedance of the system so that even budget amplifiers will be able to drive the SM65 (although a premium amplifier will bring out all the performance this remarkable speaker has to offer). This preserves the phase coherence, transient response and dynamic integrity of the signal for absolutely lifelike music and home theater reproduction in your home
The Proof is in the Listening
  • This extraordinary speaker sets a new reference standard for high-accuracy loudspeakers in its class and achieves equally superb performance with both music and movies. The StudioMonitor 55 reproduces a silky smooth, incredibly detailed sonic image at lifelike volume levels with a sense of ease which is truly remarkable. Movies and music are reproduced with unequaled purity, transparency and lifelike realism

Warranty Information

  • Electronic components- 3 Years Parts and Labor
  • Drivers and Cabinet- 5 Years Parts and Labor




Connector TypeBinding Posts
Crossover TypeSmall (60 Hz)
Enclosure TypeInternally Braced with Top Mounted Pressure Coupled Bass Radiator
Impedance8 ohms
Maximum Power Handling225
Sensitivity90 dB
Speaker TypeDurably-Constructed Bookshelf Speaker
Tweeter CompositionAluminum
Tweeter Size1
Warranty3 Years Parts and Labor. See store for full details.
Bass CompositionFiber-composite
Bass Size10 X 6 in.
Depth12.38 in.
Height13 in.
Midrange CompositionFiber-Composite
Midrange Size6.25
Shipping Weight16.5 lbs.
Width7.88 in.