GHE Series Owners Manual 7/28/98 11:32 AM Page 4
B) 160 watts RMS into 4 ohms, bothAmplifier Flexibility
channels driven, 20�20kHz with less thanBi-wiring also allows you the option of
0.02% THD.using separate stereo power amplifiers for
2.The nominal impedance of the secondyour left and right speakers. Using two
set of speakers. A pair of GHE Seriesstereo amplifiers (Fig. 5) can not only add
speakers when combined with anothersonic improvements but upgrade conve-
pair of 8 ohm speakers will present annience as well. From a sound standpoint,
impedance to the receiver/amplifier that isdual amplifiers reduce intermodulation
approximately 4 ohms. This speaker com-between left and right channels, since a
bination can be used with the receiver/complete set of input and power supply
amplifier cited in B above. If the receiver/circuits are devoted to each speaker.
amplifier has a specification similar to thatDual amps also provide an easy power
shown in A above, or if your second set ofupgrade path: you can start out with one
speakers has an impedance other than stereo amplifier then add a second one
8 ohms, you must consult the receiver/later to quadruple power reserves.
amplifier manufacturer for clarification.
BI-WIRING
Caution: Before attempting a Bi-Wire
hook-up, take a few minutes to read
through this section and follow the instruc-PREAMP
tions carefully.
The GHE Series speaker terminals areHFHF
designed so that separate sets of speakerLFLF
cable can be attached to the woofer (LF)
and midrange/ treble (HF) portions of theSTEREO AMP
crossover network. This configuration is
called bi-wiring.Fig. 4 � One Amp Bi-Wire.
Bi-wiring can provide several sonic advan-
PREAMP
tages and considerably more flexibility inw/Y-corded output
power amplifier selection.
Reduction of Intermodulation
HFHF
The majority of current flowing between
LFLF
an amplifier and speaker is devoted to the
reproduction of bass. In fact, 60% or more
STEREO AMPSSTEREO AMPS
of an amp's power is destined for the
woofers. When current flows through a
Fig. 5 � Two Amp Bi-Wire.
wire, it produces a magnetic field (EMF)
which expands and collapses at a rate
equal to that of the music's complex fre-
quency components. If a single speaker
wire must conduct the full musical fre-
quency spectrum, this preponderance of
low frequency information can interact
with or modulatehigh frequencies. The
resulting intermodulationcan create
audible changes to treble even before it
reaches your loudspeakers.
By using separate conductors for high
and low frequencies (Fig. 4 & Fig. 6),
unwanted treble modulation is avoided.
Bass flows through one, treble through
another.
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ACEC
JBL
