User manual JBL GHE1000V BLK

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Manual abstract: user guide JBL GHE1000V BLK

Detailed instructions for use are in the User's Guide.

[. . . ] Provides clean, lifelike, accurate reproduction of the human voice and other sounds revealed by midrange frequencies. Extends lowfrequency response, reduces distortion and improves power handling capacity. Fig. 1 For the best audio stereo reproduction, the two loudspeaker systems should be an equal distance from your listening position and separated so that the angle between them, at the listening position, is between 40 and 60 degrees (see Fig. For example, if your listening position is 8 to 12 feet (2. 5 to 4 m) from each speaker, the two systems should be about 8 feet (2. 5 m) apart. [. . . ] Before hooking up another set of speakers besides your GHE Series, check the following: 1. Your receiver or amplifier minimum load impedance. Impedance is always expressed in ohms and can be found in the owner's manual that came with your unit. For example, the following are typical entries in receiver/amplifier owner's manuals: A)100 watts RMS into 8 ohms, both channels driven, 20­20kHz with less than 0. 02% THD. B) 160 watts RMS into 4 ohms, both channels driven, 20­20kHz with less than 0. 02% THD. The nominal impedance of the second set of speakers. A pair of GHE Series speakers when combined with another pair of 8 ohm speakers will present an impedance to the receiver/amplifier that is approximately 4 ohms. This speaker combination can be used with the receiver/ amplifier cited in B above. If the receiver/ amplifier has a specification similar to that shown in A above, or if your second set of speakers has an impedance other than 8 ohms, you must consult the receiver/ amplifier manufacturer for clarification. Amplifier Flexibility Bi-wiring also allows you the option of using separate stereo power amplifiers for your left and right speakers. 5) can not only add sonic improvements but upgrade convenience as well. From a sound standpoint, dual amplifiers reduce intermodulation between left and right channels, since a complete set of input and power supply circuits are devoted to each speaker. Dual amps also provide an easy power upgrade path: you can start out with one stereo amplifier then add a second one later to quadruple power reserves. BI-WIRING Caution: Before attempting a Bi-Wire hook-up, take a few minutes to read through this section and follow the instructions carefully. The GHE Series speaker terminals are designed so that separate sets of speaker cable can be attached to the woofer (LF) and midrange/ treble (HF) portions of the crossover network. Bi-wiring can provide several sonic advantages and considerably more flexibility in power amplifier selection. Reduction of Intermodulation The majority of current flowing between an amplifier and speaker is devoted to the reproduction of bass. In fact, 60% or more of an amp's power is destined for the woofers. When current flows through a wire, it produces a magnetic field (EMF) which expands and collapses at a rate equal to that of the music's complex frequency components. If a single speaker wire must conduct the full musical frequency spectrum, this preponderance of low frequency information can interact with or modulate high frequencies. The resulting intermodulation can create audible changes to treble even before it reaches your loudspeakers. By using separate conductors for high and low frequencies (Fig. 6), unwanted treble modulation is avoided. Bass flows through one, treble through another. 4 PREAMP HF LF HF LF STEREO AMP Fig. 4 ­ One Amp Bi-Wire. PREAMP w/Y-corded output HF LF STEREO AMPS HF LF Fig. [. . . ] To replace grille, reposition it carefully and press gently at the corners. Do not push on the center area of the grille. The loudspeaker cabinet may be cleaned with a slightly damp cloth. To remove dust from the grille cloth, use a vacuum with a brush attachment. [. . . ]

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