Appendix; Enhanced Hf Neodym Speakers; Tuned Resonance™ Cabinets - Hughes & Kettner QC 421 Manual De Instrucciones

TM
Quantum -combo Manual

9. Appendix

9.1 Enhanced HF Neodym Speakers

All Quantum™ amps are loaded with advanced speakers sporting
Neodym magnets. Not only does this technology reduce weight
significantly, it also creates a more concentrated magnetic field for
improved impulse response. Speakers trigger faster and with greater
precision, ensuring truer response to the player's touch and enhan-
cing loudness. Our developers developed these rigs to render the
crucial overtone spectrum with utmost uniformity. The projection
pattern of conventional amps' high-frequency horns is a tight cone.
Because these horns are driven by crossovers, phase shifting is in-
evitable. This is why Quantum™ series loudspeakers were designed
with integrated HF systems. While the 10" speakers use parallel
membranes (that is, a dual cone design) to this end, the 12" and
15" woofers feature a completely new technology. A machined
aluminum cone (DuraDome™) renders the voice coil's high fre-
quency output. Both of these technologies deliver true response,
a wide pattern of throw, and a rich overtone spectrum that blends
perfectly with the main membrane's low and midrange frequency
response.
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9.2 Tuned Resonance™ Cabinets
Many years experience designing, tuning and manufacturing loud-
speaker enclosures enabled the Quantum™ development team to
build cabinets that – like fine acoustic instruments - make the most
of resonances. Intelligently engineered and arrayed panels and
bracings, and the housing's robust, six-ply okumé plywood (weighing
about half as much as standard cabinet woods), deliver punchy
low-end projection and finely balanced, crisp midrange resonance.
Because the enclosure projects these resonances uniformly across its
entire surface area, the bass signal can be localized precisely from
any position on the stage.