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Definitive Technology StudioMonitor-55 High-Performance Shelf/Stand Monitor Loudspeaker- Black

Model #: StudioMonitor-55


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Definitive Technology StudioMonitor-55 High-Performance Shelf/Stand Monitor Loudspeaker 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. 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.


• 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.


Driver Complement
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
Oval Width 6" (15.24cm)
Oval Height 10" (25.40cm)
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 - 255 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 16.31 lbs
Drivers and Cabinet
Parts and Labor 5

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