GHE 1000V (serv.man2) - JBL Audio User Guide / Operation Manual. Page 4

B) 160 watts RMS into 4 ohms, both
channels driven, 20–20kHz with less than
0.02% THD.
2. 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 com-
bination 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.

Caution: Before attempting a Bi-Wire
hook-up, take a few minutes to read
through this section and follow the instruc-
tions 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. This configuration is
called 

bi-wiring.

Bi-wiring can provide several sonic advan-
tages 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 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 

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. 4 & Fig. 6),
unwanted treble modulation is avoided.
Bass flows through one, treble through
another.

Amplifier Flexibility
Bi-wiring also allows you the option of
using separate stereo power amplifiers for
your left and right speakers. Using two
stereo amplifiers (Fig. 5) can not only add
sonic improvements but upgrade conve-
nience 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. 

4

Fig. 4 – One Amp Bi-Wire.

Fig. 5 – Two Amp Bi-Wire.

GHE Series Owners Manual  7/28/98 11:32 AM  Page 4