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The Definitive Technology StudioMonitor 450 is a compact, high-performance bookshelf speaker with an elegant piano-gloss black lacquer finish. Despite its size, its 10-inch pressure-coupled Low Bass radiator delivers the deep, impactful bass of a floor-standing speaker.

Sonic performance is stunning, providing razor-sharp, three-dimensional imaging, incredible detail, and a ruler-flat frequency response. Utilizing a 6.5-inch high-definition cast basket bass/midrange driver and a 1-inch pure aluminum dome tweeter, the speaker achieves smooth, extended response beyond 30kHz, reduced distortion, and high power handling. They perform well stand-alone or with a subwoofer.

As a user, I found these speakers fantastic for a home theater setup, delivering a big, powerful, and sweet sound. They are full-range but benefit from a subwoofer for heavy bass. Cosmetic condition is rated 8.5/10 due to a small tear (≤¼ inch above the front decal) and minor scuffs on the gloss ends, though they polish up nicely and look great from a distance.

Product Specs:

• Frequency Response: 24–30,000 Hz
• Sensitivity: 90 dB
• Impedance: 8 ohms
• Power Handling: Up to 225 watts
• Drivers: 1" aluminum dome tweeter, 6-1/2" woofer, 10" passive bass radiator
• Features: Keyhole slots, 5-way binding posts, high-gloss piano black finish
• Dimensions: 8-3/8" W x 13-1/8" H x 11-7/16" D
• Weight: 20 lbs (each)