YORKVILLE TX2P, Owner'S Manual, Page: 8 / 24

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processor inputs are female XLR’s and the outputs are male XLR’s. Most mixers now have
balanced outputs using 1/4-inch TRS (tip-ring-sleeve) jacks or XLRs. Power amp inputs
tend to be balanced these days too, but many of the old amplifiers still in use have unbal-
anced inputs. As well, certain older mixers may have unbalanced outputs. This is not a
problem because TX processors are electronically balanced with a special “Remote Ground
Reference” feature. With this feature, you can achieve the noise rejection of a totally bal-
anced mixer-processor-amplifier setup even when the amp inputs or mixer outputs are
unbalanced, usually just by employing the right type of patch cables. To achieve balanced-
type noise rejection when connecting a TX processor to an unbalanced mixer or amplifier,
use balanced, 3-element (2 centre leads plus shielding) patch or mic cables. In some cases,
just doing this will provide balanced-type noise rejection. This is because manufacturers in
the past have often used stereo input or output jacks, even though their amplifiers or mixers
were unbalanced, and interconnected the ring and ground tabs internally. This is enough for
the RGR system to work using regular balanced cables. However, if the mixer or amp does
not have this feature and you find that simply using a balanced patch cord does not cut
down on the hum or hiss, try rigging the following special cable:
Start with a balanced patch cord or mic cable with the appropriate male or female XLR
on the TX end. Keep in mind that the TX processor’s XLR wiring configuration is; pin 2 = tip
(hot), pin 3 = ring (hot, reverse phase) & pin 1 = ground. Remove the stereo 1/4” plug or
XLR from the other end being sure to twist the wire previously from pin 3 and the ground
shield wire together. Solder the “hot” in-phase wire from XLR pin 2 to the plug’s hot tab (the
shorter one). Now solder the twisted wires to the plug’s ground lug and screw on the jacket.
Finally, mark that cable with tape for future use.
Speakers - Phased Arrays:
In addition to wiring up a TX system correctly, you need to be concerned with proper setup
of the enclosures.
No more than the usual care need be taken if you are running a small system, say two
TX3’s and a TX9S on each side of the stage. However, if the system is larger and high sound
pressure is the order of the day, perhaps at an outdoor concert or in a very large venue, you
will need to array the enclosures so that their acoustic outputs are in phase.
Creating in-phase speaker arrays is basically a matter of keeping similar enclosures close
together, facing in the same direction and aligned on the same horizontal plane. This is
referred to as close-coupling. TX enclosures are trapezoidal so that similar ones, when close-
coupled, create a semicircular array and thus provide a wide coverage angle. The TX9S
subwoofers should also be close-coupled when used in multiples - although they are not
trapezoidal, low frequencies tend to be omni-directional and so they automatically have
a wide coverage angle. The TX9S subwoofers may be flown or freestanding and should be
close coupled as well.
It is not generally advisable to close-couple dissimilar enclosures when they are reproduc-
ing the same frequency range. For example, you would probably not mix TX3’s and TX4’s
close-coupled. The reason for this is that you will lose some of the potential additional
sound pressure due to the enclosures’ slightly different phase characteristics causing acous-
tic cancellations at various frequencies. This applies to all speaker systems. Subwoofers also
should not be mixed, and for the same reason. Mixing very different subwoofers, for exam-
ple horn-loaded and non-horn-loaded, can often result in a loss of low-frequency sound
pressure because the phase characteristics are so very different. Once again, array similar
enclosures for maximum reinforcement.
Flying Hardware:
TX8 3-way enclosures and the TX9S subwoofers come with slots to take 30-degree angled
bars called BAR30s which lock in place with QUICKPINs to close-couple the enclosures
side by side and hold them solidly together when flown in arrays. Other flying hardware
includes SWIVLE-RINGs which lock into the upper and lower tracks for quick setup and
teardown. They accept the cable eyes or shackles (our model SHACKLE3/8A). And for per-
manent installations, the upper and lower tracks will accept an EYEBOLT3/8A. To install this,
simply remove the large Allen-head screw located in the bottom of the track about the mid-
way mark and replace it with the eyebolt.