The Resolution Series Subwoofer is a powered subwoofer that features the same elegant cabinet construction as its full range counterparts. A 15" driver operates in a sealed enclosure for superior transient attack. The Krell Class AB amplifier, built specially for the Resolution Subwoofer, has a rated output of 700 Watts. Free from the limitations imposed by the conventional Class D amplifier designs found in other subwoofers, the Class AB amplifier in the Resolution Subwoofer provides exceptional bass control, and tremendous low-frequency extension at high sound pressure levels. A custom crossover offers both low and high pass filters and selectable frequency. Balanced and single ended inputs are provided.

The Resolution Series includes five models for high performance music systems as well as high performance home theater systems, and uses the same design principles and techniques that are the foundation of the LAT Series.

Cabinet Design
The Krell Resolution Series features robust MDF construction. The external enclosures are 1- inch in wall thickness and the baffles are constructed of a unique 2-inch thick sandwich that eliminates baffle resonance. Midrange drivers are isolated within internally braced sub-enclosures. The curvature of the cabinets is designed to completely minimize the effects of internal standing waves. Internal bracing is aligned asymmetrically to increase cabinet rigidity while further reducing internal resonant modes.

"Starting with the most rigid enclosure possible," Mr. D'Agostino explains, "insures the sound emanating from the speaker is only from the drivers. Any interaction from the cabinet distorts the music and diminishes the listener's involvement."

High Performance Crossover Networks
All network components are mounted on 1/8-inch thick glass epoxy circuit boards with oversized 4-ounce copper traces. This design ensures superior linearity by minimizing circuit resistance and inductance. It also eliminates microphonics and assures high current handling capability. "Typical crossovers act as funnels," described Mr. D'Agostino. "Power delivered by the amplifier is choked off before it reaches the drivers. The breadth and dimension of the music is compressed by the crossover." Mr. D'Agostino continues, "Our experience in designing and manufacturing high power amplifiers is the underpinning of our crossover design. The crossovers behave as if they were extensions of our amplifiers, directing the power to the drivers unimpeded."

Network inductors are all air-core pure-copper designs; in the Resolution 1 the largest of these is formed of 10-gauge wire, measuring 5 inches in diameter. Multiple individually potted polypropylene capacitors are employed in parallel to minimize resistance and inductance while improving current handling.

In combination with the advanced drive units, the Resolution crossover networks are engineered to provide an extremely smooth impedance curve with high efficiency. They, therefore, present a predictable, nearly ideal load to the power amplifier.