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Definitive Technology StudioMonitor 55

Definitive Technology STUDIOMONITOR 55 Bookshelf Speaker featuring BDSS long-throw bass/midrange driver for flat, accurate response with micro-detail retrieval 

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€ 599.00

Definitive Technology STUDIOMONITOR 55 Bookshelf Speaker

Second generation patented 6-1/2" BDSS mid/bass driver with Linear Response Waveguide technology for flat, accurate response with micro-detail retrieval and three-dimensional imaging
Cast aluminum driver baskets
Second generation pure aluminum dome tweeter for smooth, extended highs
Top-mounted racetrack bass radiator for outstanding bass response
Non-resonant braced enclosure ensures pure, uncolored performance
High-gloss anti-diffraction baffle and shaped enclosures reduce diffraction for open and spacious imaging
Crossover network features oversize inductors and premium Mylar capacitors for audiophile-grade sound quality
Integrated Zobel network makes the SM55 easy for amplifiers to drive
Bi-amp/bi-wire all-metal 5-way binding posts

Redesigned From the Ground Up for Superior Performance, Utility and Beauty
The new Definitive StudioMonitor series is the culmination of over 20 years of research and development to create monitor-quality shelf speakers with the perfect balance of high style, utility and most of all performance.

The Most Advanced Technologies for the Most Advanced Performance
If you love great sound you must experience Definitive's StudioMonitor 55. Its combination of racetrack bass radiator technology, and our latest generation patented Balanced Double Surround System (BDSS) bass/midrange drivers, all housed in a rock-solid attractive enclosure, delivers unsurpassed sonic performance.

Each SM 55 features a cast-basket 6-1/2" (17cm) second generation BDSS midrange driver and a 1" (25mm)

The SM55 features a second-generation patented BDSS bass/midrange driver for best-in-class sonic performance
pure aluminum dome tweeter. The driver features 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.

The BDSS long-throw bass/midrange driver is pressure coupled to a top mounted racetrack bass radiator to extend and amplify bass frequencies. The total bass radiating area of a SM55 is substantially greater than that of a single 10-inch woofer but with far greater control, definition and speed than a single sluggish large woofer. The StudioMonitor's bass performance is nothing short of astonishing in its depth, detail and musicality.

Slim Elegant Styling with Rock-Solid Performance
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 contoured 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 55 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 SM55 loudly without distortion (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.

Now that you're thoroughly impressed with the technology and passion we've poured into the StudioMonitor 55 it is time to find a stocking dealer near you to audition this remarkable achievement of art and science.

Definitive Technology STUDIOMONITOR 55 Bookshelf Speaker

Driver Complement
Quantity 1 
Diameter 1" (2.54cm) 
Type Pure Aluminum Dome 
Mid / Woofer
Quantity 1 
Diameter 6 1/2" (16.51cm) 
Type BDSS 2nd Generation 
Tweeter/Mid Array
Type Direct Radiating 
Bass Radiator
Quantity 1 
Oval Height 10" (25.40cm) 
Oval Width 6" (15.24cm) 
Type Racetrack Planar Bass Radiator 
Audio Inputs
Speaker Level 2 Pair (Bi-wire Ready) 
Maximum Sensitivity
1 watt @ 1 Meter 90 dB
Total Frequency Response
Overall 32 Hz - 30 kHz 
Nominal Impedance
Compatible with 8 ohm
A/V Receiver Crossover Setting Small (60 Hz) 
Power Handling 20 - 225 watts per channel
Vertical Orientation On Shelf or On Stand 
Product Weight
Out of Box 15 lbs
Cabinet Dimensions
Height 13" (33.02cm) 
Width 7 7/8" (20.00cm) 
Depth 12 3/8" (31.43cm) 
Cabinet Type
Speaker Enclosure Internally Braced with Top Mounted Pressure Coupled Bass Radiator 
Included Accessories Bumpers (4) 
Optional Accessories StudioMonitor Stand (Not Included) 
Carton Size
Height 16 1/16" (40.80cm) 
Width 11 3/16" (28.42cm) 
Depth 15 3/4" (40.01cm) 
Shipping Weight
One per Carton 16.5 lbs
Manufacturer's Warranty
Parts and Labor 5


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