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APPENDIX D: SPECIFICATIONS
NOTE: Loudspeaker system predictions for coverage and SPL are available in Meyer Sound’s MAPP
prediction software.
LYON Specifications
LYON-MLYON-WLYON-WXT
ACOUSTICAL
Operating Frequency Range55 Hz – 16.5 kHz
Note: Recommended maximum operating frequency range. Response depends on load-
ing conditions and room acoustics.
Phase Response80 Hz to 16 kHz ±30°
Linear Peak SPL143.5 dB with crest factor
>17.5 dB (M-noise),
137.5 dB (Pink Noise),
140 dB (B-noise)
143.5 dB with crest factor
>17.5 dB (M-noise),
136.5 dB (Pink Noise),
138.5 dB (B-noise)
143.5 dB with crest factor
>17.5 dB (M-noise),
136.5 dB (Pink Noise),
138.5 dB (B-noise)
Note: Linear Peak SPL is measured in free-field at 4 m referred to 1 m. Loudspeaker SPL
compression measured with M-noise at the onset of limiting, 2-hour duration, and 50-
degree C ambient temperature is <2 dB.
M-noise is a full bandwidth (10 Hz–22.5 kHz) test signal developed by Meyer Sound to
better measure the loudspeaker’s music performance. It has a constant instantaneous
peak level in octave bands, a crest factor that increases with frequency, and a full band-
width Peak to RMS ratio of 18 dB. The presence of a greater-than (>) symbol with regard
to crest factor indicates it may be higher depending on EQ and boundary loading.
Pink noise is a full bandwidth test signal with Peak to RMS ratio of 12.5 dB.
B-noise is a Meyer Sound test signal used to ensure measurements reflect system
behavior when reproducing the most common input spectrum, and to verify there is still
headroom over pink noise.
COVERAGE
Horizontal Coverage90°110°110°
Vertical CoverageVaries, depending on array length and configuration; LYON-WXT has extended vertical
coverage.
TRANSDUCERS
Low FrequencyTwo 12-inch long-excursion cone drivers; 4 Ω nominal impedance
High FrequencyTwo 3-inch compression drivers coupled to a constant-directivity horn through a pat-
ented REM
®
manifold; 16 Ω nominal impedance.
AUDIO INPUT
TypeDifferential, electronically balanced
Maximum Common Mode Range±15 V DC, clamped to earth for voltage transient protection
ConnectorsXLR 5-pin female with male loop output; XLR 3-pin female connectors available to
accommodate only balanced audio (no RMS signals)
Input Impedance10 kΩ differential between pins 2 and 3
WiringPin 1: Chassis/earth through 1 kΩ, 1000 pF, 15 V clamped network to provide virtual
ground lift at audio frequencies
Pin 2: Signal (+)
Pin 3: Signal (–)
Pin 4: RMS (polarity insensitive)
Pin 5: RMS (polarity insensitive)
Case: Earth ground and chassis
Note: Pins 4 and 5 (RMS) included only with XLR 5-pin connector that accommodates
both balanced audio and RMS signals.
Nominal Input Sensitivity0.0 dBV (1.0 V rms) continuous is typically the onset of limiting for noise and music
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