Electro-Voice EVID Series Owner's Manual page 14

Installation Examples Installation Examples
The EVID™ Series is a product family with The EVID™ Series is a product family with
the flexibility to fit the requirements of the flexibility to fit the requirements of
many different applications. Listed below many different applications. Listed below
are some suggested combinations for are some suggested combinations for
systems using the 12.1. systems using the 12.1.
• • Rich, f Rich, full-so ull-soundin
music and paging in a quiet restaurant, music and paging in a quiet restaurant,
office, or retail space: two EVID™ 3.2s office, or retail space: two EVID™ 3.2s
in parallel on each output of a 12.1. in parallel on each output of a 12.1.
• • Moderate-le Moder ate-level mu
sports bar/restaurant or upbeat retail sports bar/restaurant or upbeat retail
space: two EVID™ 4.2s in parallel on space: two EVID™ 4.2s in parallel on
each output of a 12.1. each output of a 12.1.
• • Higher-leve Highe r-level fore
heavy applications such as dance floors, heavy applications such as dance floors,
amusement arcades, or loud bars: use amusement arcades, or loud bars: use
one EVID™ 6.2 on each output of 12.1. one EVID™ 6.2 on each output of 12.1.
EVID™ systems may be used together. EVID™ systems may be used together.
For example, a large hotel might use eight For example, a large hotel might use eight
3.2s and two 12.1s in the dining room, 3.2s and two 12.1s in the dining room,
eight 4.2s and two 12.1s in the lounge, eight 4.2s and two 12.1s in the lounge,
four 6.2s with two 12.1s surrounding the four 6.2s with two 12.1s surrounding the
dance floor, 6.2s around the pool, 6.2s or dance floor, 6.2s around the pool, 6.2s or
4.2s with or without 12.1s in the lobby, and 4.2s with or without 12.1s in the lobby, and
3.2s in the corridors. 3.2s in the corridors.
Crossover Frequency and Crossover Frequency and
Impedance Impedance
The EVID™ 12.1 is designed to be used The EVID™ 12.1 is designed to be used
as a as a passive subwoofer passive
amplifiers or signal processors are amplifiers or signal processors are
required to achieve full benefit of the required to achieve full benefit of the
12.1's performance. The built-in passive 12.1's performance. The built-in passive
stereo crossover sends the lowest notes stereo crossover sends the lowest notes
of both stereo channels to the 12" dual-coil of both stereo channels to the 12" dual-coil
bass driver and reduces the amount of low bass driver and reduces the amount of low
frequencies sent to the satellite speakers. frequencies sent to the satellite speakers.
This allows them to play louder and This allows them to play louder and
cleaner while presenting a more even, cleaner while presenting a more even,
amplifier-friendly impedance load than if all amplifier-friendly impedance load than if all
the speakers were connected in parallel. the speakers were connected in parallel.
The EVID™ 12.1's crossover tunes a The EVID™ 12.1's crossover tunes a
combination of electrical and acoustic combination of electrical and acoustic
characteristics to complement the characteristics to complement the
response of the full-range EVID™ models. response of the full-range EVID™ models.
The crossover point is set electrically in The crossover point is set electrically in
the 160Hz range with a topology that the 160Hz range with a topology that
enables the nominal system impedance to enables the nominal system impedance to
be determined by the number of satellites be determined by the number of satellites
per channel. per channel.
12 12
Appendix A: Integrating the Subwoofer Appendix A: Integrating the Subwoofer
unding low-l g low-level b evel backgr ackground
vel music a sic and p nd paging aging
l foregroun ground mus d music in ic in
subwoofer. No . No additional additional
Using a Using a
Channel for the 12.1 Channel for the 12.1
In certain specialized applications, it may In certain specialized applications, it may
be desirable to drive the subwoofer with a be desirable to drive the subwoofer with a
separate amplifier channel. In these separate amplifier channel. In these
applications the active crossover point applications the active crossover point
ound
must be at or below 160Hz so as not to must be at or below 160Hz so as not to
interfere with the built-in passive cross- interfere with the built-in passive cross-
over. Both sections (left and right inputs) over. Both sections (left and right inputs)
must be connected in parallel (4 ohm must be connected in parallel (4 ohm
in a in a
system impedance) when operating as a system impedance) when operating as a
mono device. No load resistors are mono device. No load resistors are
necessary on the hi-pass outputs. necessary on the hi-pass outputs.
Characteristics of All Characteristics of All
bass- bass -
Subwoofers Subwoofers
While subwoofers do radiate sound While subwoofers do radiate sound
omnidirectionally (in all directions) and the omnidirectionally (in all directions) and the
sound is generally non-localizable (one sound is generally non-localizable (one
can't hear exactly where it comes from), can't hear exactly where it comes from),
subwoofer sound level still drops off the subwoofer sound level still drops off the
farther one moves from the subwoofer. farther one moves from the subwoofer.
The highest output and best room loading The highest output and best room loading
are accomplished with the subwoofer are accomplished with the subwoofer
mounted in a corner at a three-boundary mounted in a corner at a three-boundary
junction (wall/wall/ceiling junction (wall/wall/ceiling
an arrangement also referred to as 1/8 an arrangement also referred to as 1/8
space). Mounting at a two-boundary space). Mounting at a two-boundary
junction (wall/ceiling, junction (wall/ceiling,
produces three dB less output, and produces three dB less output, and
mounting in the middle of a room in the mounting in the middle of a room in the
ceiling (1/2 space) reduces output still ceiling (1/2 space) reduces output still
another three dB. another three dB.
Subwoofers produce large amounts of Subwoofers produce large amounts of
long-wavelength low-frequency long-wavelength low-frequency
Every object has its own resonant Every object has its own resonant
frequency, and frequency
excite large objects (like walls, floors, excite large objects (like walls, floors,
doors and ceiling panels). Anything loose doors and ceiling panels). Anything loose
in or on a ceiling or wall will buzz or rattle in or on a ceiling or wall will buzz or rattle
as a subwoofer's level is increased. Most as a subwoofer's level is increased. Most
of these can be isolated and fixed with of these can be isolated and fixed with
small, strategically placed bits of foam small, strategically placed bits of foam
tape. Others may require driving additional tape. Others may require driving additional
nails or screws and perhaps some nails or screws and perhaps some
caulking to dampen their sympathetic caulking to dampen their sympathetic
movement. Be aware that as bass levels movement. Be aware that as bass levels
increase, so does the likelihood of rattles increase, so does the likelihood of rattles
and buzzes. and buzzes.
Separate Separate Amplifier Amplifier
or wall/wall/floor, or wall/wall/floor,
or 1/4 or 1/4 space) space)
, and long wavelengths tend to long wavelengths tend to
TM TM
EVID EVID Owner's Manual Owner's Manual
energy. energy .