ULTRA BOOKSHELF
Frequency Response and Electro-Acoustic Data:
• Rated bandwidth: 45 Hz-32 kHz (± 3 dB).
• Nominal impedance: 8 ohms.
• Sensitivity: 87 dB (2.83V @ 1 meter full-space, 300-3kHz).
• Recommended amplifier power: 20-150 watts
Loudspeaker Physical Description:
• Dimensions (HxWxD): 14.9" x 8.5" x 10", 37.8 x 21.6 x 25.4 cm.
• Weight: 19 lbs., 8.6 kgs.
• Dual gold-plated 5-way binding posts.
• 1.7” rear-firing port.
• Cloth grille with pin/cup retention system.
Driver Array and Technical Highlights:
• 1" tweeter features FEA-optimized diffuser and aluminum dome.
• 6.5" woofer features composite glass-fiber cone, aluminum shorting ring, cast aluminum
basket and vented voice coil former.
SoundMatch Crossover Network:
• 2-way crossover with premium-grade capacitors, air-core inductors and heavy-trace
printed circuit boards.
• Crossover frequency and slopes optimized for excellent off-axis polar response, outstand-
ing phase coherency, and total radiated sound power.
• Tweeter-to-woofer crossover: 2 kHz.
Cabinet Construction Technical Highlights:
• Precision CNC-manufactured cabinet with extensive internal blocking and bracing,
resulting in no resonances and excellent rigidity.
• Acoustically transparent and FEA optimized grilles, wedge-shaped front baffle and
flush-mounted drivers all contribute to reduced edge diffraction and improved on-axis high
frequency response.
ULTRA SPEAKER FEATURES & SPECIFICATIONS
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