System Acoustic Design Considerations - Electro-Voice Sx600 User Manual

System Acoustic Design
Considerations
Direct radiator acoustic systems can offer great vocal band clarity but
don’t usually offer the efficiency and directivity of horn loaded systems.
Horn loaded systems, if the overall dimensions are large enough, can
offer great directivity control, but typical multi-way horn designs,
particularly high Q co-axial designs, are also naturally resonant.
Resonant systems suffer from poor time domain response and, as a
consequence, can have poor intelligibility. The EV solution is to combine
a two element critically spaced midbass line array with ultra-efficient
neodymium magnetics. This produces the high SPL levels and vertical
directivity of a properly horn loaded low/mid section while maintaining the
clear vocal reproduction of a well damped direct radiator system. The
Electro-Voice ND12A neodymium midbass driver developed for X-Array
has been optimized for ultra high level, high intelligibility 300Hz to 2kHz
response. The ND12A incorporates EV’s Ring Mode Decoupling (RMD)
technology to dampen mechanical domain resonances that “color” vocal
fundamentals in normal direct radiator systems. RMD, found in most EV
drivers, ensures level independent tonal response and produces a level
of intelligibility unique to EV systems. The second 12 inch driver, a
specially modified DL series, works with its own crossover section and
critical spacing to the ND12A to greatly improve midband vertical
directivity and system output below 300Hz. The result is clear, clean
vocals, with the SPL capabilities required for large spaces.
The SX600 also features EV’s DH2T medium format compression driver
coupled to our unique Varipath constant directivity high frequency horn.
The HF horn pattern is optimized to a 65° horizontal by 65° vertical
included angle to produce both long throw and wide front to back
audience coverage. The high power handling and low distortion
performance of the DH2T assures excellent vocal articulation with
extended high frequency coverage to beyond 16kHz.
Electro-Voice
® 3
Sx600 User Manual