3
Product Description
The QBx 25 (“Quiet Box”) Tower is a compact and slim floorstanding loudspeaker providing
exceptional performance and value. The QBx 25 features unique cabinet construction, superior
drive units, 2
1
/
2
way design and a complex crossover, which contribute to its superior sound
quality.
QBx Technology
In an ideal speaker, the speaker cabinet is inert and resonance free. It should have smooth
contours without projections that cause reflections which degrade high frequency response. In
short, the cabinet should not negatively affect the sound of the loudspeaker. QBx (Quiet box)
refers to a number of techniques that reduce the detrimental effects that typically come from
the resonances and reflections of ordinary cabinets.
“Butterfly” grille cutout
The necessary cutout area around the tweeter is given a highly irregular contour to prevent the
irregular high frequency response that would otherwise occur. The contour expands and
contracts around the perimeter of the tweeter, creating a “butterfly” shape.
Elliptical baffle edges
The grille is mounted flush into the baffle. The baffle edges have large elliptical radiuses. This
smooths the cabinet termination, greatly reducing the edge reflections. High frequency
smoothness is preserved.
High-Loss Sandwich Baffle
The unique high loss baffle is constructed from multiple layers of wood and a high tech
adhesive. The “lossy” adhesive that laminates the two layers of speaker baffle greatly reduces
cabinet resonances, resulting in purer midrange and clean, crisp bass.
Hand-Tuned Crossover
The crossover networks were designed using sophisticated computer simulation. Final system
balance is determined by exhaustive listening tests. These networks adhere to an “in-phase” or
Linkwitz-Reilly design: time alignment and coherency are maintained through the transition
region from driver to driver. In production, each crossover is individually tuned by technicians
to within
±
0.5dB of the Master Reference, ensuring predictable performance in your home.
Drive Units
This 2
1
/
2
way tower uses a 1-inch black-anodized aluminum dome tweeter with a multifinned
aluminum heatsink and dual 6
1
/
2
-inch bass units with High Definition Aerogel cones. The
video-shielded driver complement provides unlimited placement options.
