Krell Industries MASTER REFERENCE SUBWOOFER manual Krell Core Technologies

(SECTION ONE: About Krell continued)

(Drivers continued)

Two 80 oz. strontium ferrite magnets are affixed to the custom-made, cast magnesium speaker frame. The magnet assembly has been contoured to produce a powerful, focused, magnetic field. A robust, doped (reinforced) paper cone, chosen for its high strength and low weight, is affixed at one end to the speaker frame via a special rubber surround. This surround has a unique geometry that resists cavitating (turning inside out) under high pressures. At the other end of the cone, Krell utilizes a dual-spider arrangement in order to maintain the superi- or alignment of the concentric mechanical assembly under all performance con- ditions. An extra-long voice coil controls the drivers even at maximum excursion.

Krell Core Technologies

Krell CAST and Krell Current Mode

These circuit topologies combine to transmit audio waveforms between compo- nents in the current rather than the voltage domain. Krell components using Krell Current Mode circuitry and CAST technology perform as if they are part of a single circuit. The resulting speed and bandwidth produce outstanding accuracy and realism in music reproduction.

Krell Proprietary Output Devices

Loudspeaker control is paramount in any audio system. Control is even more critical in subwoofers, in which the audio band is limited to the extreme low frequencies. Krell amplifiers are known for the control they exert on even the most complex loudspeaker loads. Part of this capacity is a result of the proprietary output devices used in all Krell amplifiers. These devices, manufactured for Krell by Motorola, allow for high gain and low output impedance. These circuits enable the amplifier to deliver enormous amounts of current with relative ease and with less distortion.

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