System information

X-Array Touring Loudspeaker Systems – Applications Notes – Page 29
per personal preference. Because the compressor is pre output level, compressor gain reduction will not
be affected by output-level adjustments.
D.10 Gate (Expander) Parameters
The DN8000 provides an expander noise gate on each output. These noise gates allow the outputs to
fade to digital black for extremely low-noise performance when the drive signals drop below the gate
thresholds. The audibility of the gate settings are very much dependent upon the program material. The
gate-threshold settings and gate-range settings shown in the digital-parameter spreadsheets effectively
disable the gate function. The user should adjust the parameters as necessary based on program-
material dynamics and personal preference. Changes in gate settings will not affect loudspeaker protec-
tion or performance. The user should note that the gate is pre output level; therefore, output-level ad-
justments will not affect gate performance.
HELPFUL HINT: When tuning an X-Array system, the expander noise gates should be adjusted as per
personal preference to match the program material. Gate settings will not affect loudspeaker perform-
ance or protection. Because the gate is pre output level, gate performance will not be affected by output-
level adjustments.
D.11 Mute Parameters
The DN8000 settings in the included tables show the mutes turned off. As a safety precaution, the user
may prefer to program the controller to power up with the mutes turned on (in other words, with no signal
output). If the unit powers up with the mutes turned on, however, the mute buttons must be manually re-
set to the "Off" position on each output to send signal to the amplifiers.
HISTORY OF REVISIONS
APNote (January 1998): This was the original release of the X-Array applications notes.
APNote-2 (February 1998): The discussion of the calibration of the DN8000 limiters for use with amplifiers other
than the Electro-Voice P3000 was moved to from the main body of the text to the Appendix. Various minor typo-
graphic errors were corrected.
APNote-3 (May 1998): Based on field experience, the recommended systems setups were revised. Revisions were
made to the compressor threshold settings because of reports of field problems with the settings in the previous
revision. In the Options menu, the compressor-threshold reference was changed from "dB Below Limit" to "dBu."
The individual output compressor thresholds were then changed to +10dBu (which effective eliminates the com-
pressor function), with a note that the user should adjust the compressor settings as necessary. Slight EQ and level
changes were also made to the recommended settings. A note was added to the Digital Signal Processing section
indicating that the settings recommended in these notes may be more up to date than factory presets in DN8000
units. A caution was added to the Gain/Output Level section noting that the compressor and limiter thresholds must
be changed when the Output Drive Voltage setting is changed from the Options menu. Some additional Rigging
Accessories were added. The history of revisions (this section) was added as Appendix A. The DN8000 amplifier
calibration section, which was Appendix A, became Appendix B.
APNote3A (July 1998): The part number for the Xrhp pickup hinge in the Accessories Appendix was incorrect –
the correct number is 510-3000.
Revision 4.0 (August 1999): This was a substantial rewrite to improve clarity and add new information. The docu-
ment appearance format was changed and revision-level numbering system was changed. The Introduction section
was added. Sections on Wiring and Polarity were added. Amplifier recommendations were expanded upon and
cautions were added. Notes were added about substituting Xcb systems for Xb systems. Notes were added about
substituting Xcn systems for Xn MB and HF sections. Notes were added about turning the Xn LF amplifiers down
when they share the same drive signal as the Xb LF systems. The Xb, Xn & Xds Mono Max Output preset was in-
troduced. Sections on Signal Delay Parameters for component alignment, system alignment and enclosure mis-
alignment compensation were added. Limiter-threshold calibration for amplifiers is discussed in more detail. Signal
delay concepts for aligning the Xds subwoofer with the low-frequency sections of the Xn, Xb and Xcb were intro-
duced. A cautionary note was added about adjusting the infrasonic or ultrasonic filters. Brief notes about the Xw12
and Xw15 were added. Graphics were added. The differences in the DN8000 signal-delay display was discussed
for operating systems revisions 1.19 and earlier compared to 1.20 and later.