Atlas Sound 70.7V Speaker User Manual


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1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333
FAX (800) 765-3435
©2008 Atlas Sound L.P. All rights reserved. Atlas Sound and Strategy Series are trademarks of Atlas Sound L.P. All other trademarks are property of their respective owners. ATS002219 RevB 10/08
General Description
TheFAPSUBconsistsofahighlyefficient8”subwooferdesignedfor
optimal performance in its included enclosure system. The woofer fea-
turesanextended,ventedpolepieceforhigherexcursionandbetterheat
dissipation and a Kapton
®
voice coil former for increased power handling.
Ahighlyefficient,3-polefilteringnetworkeliminatesunwantedhigh
frequencies from the woofer, while the 937 in
3
, tuned and ported, deep
drawn steel enclosure provides frequency response down to 45Hz
(±10dB).Aspeciallydesignedrippledspeakerdustcaphelpseliminate
nearly all frequency artifacts emanating from the center of the woofer
cone.
A special low saturation 70.7V / 100V transformer is included with pri-
mary taps at 1.9, 3.8, 7.5, 15, 30, and 60 watts (@70.7V) to match and
balancethesubwooferwithfullrangespeakerswithouttheneedforsep-
arate amplification. A convenient front mounted selector switch allows
tapselectionwithouttheneedtoremovethespeakerfromtheceiling.
Thistapselectorswitchalsoincludesatransformerbypasssettingfor8Ω
/ direct coupled applications.
Mounting is simplified with Strategy Series
®
style"DogLeg"tabsthat
allow easy installation into drop tile or drywall ceilings with the provided
tilebridgeassembly.Thetilebridgeconsistsoftwo“V”shapedformed
mountingrailsandaC-Ringassembly.TheC-Ringcanbeattachedtothe
railswiththescrewsprovidedtoextendsupporttotheT-Bargridinsus-
pended ceiling applications. Multiple hole locations are provided to allow
theC-Ringtobepositionedtotheouteredgethetileifnecessary.
Forexistingdry-wallapplications,thetilebridgeC-Ringandsupportrails
canbeinsertedintotheholecutfortheFAPSUB.Foreasypositioning,
the“V”shapedsupportrailsmatchtheshapeoftheC-Ringtabsforeasy
maneuveringandlocationwhenworking"blindly"abovethedeck.
For new construction drywall ceiling applications, the optional FAP82-TR
trimringisavailable.Thisunitprovidesamarkedlocationfordrywall
installers to cut around, essentially reserving the desired location in the
ceilinguntilfinalinstallationofFAPSUB.Mountingholesareprovidedto
accommodate 16" or 24" OC stud / joist mounting.
AsupportringisalsoprovidedonthetopoftheFAPSUBenclosureto
facilitateanauxiliarysupportcable.
NOTE: IT IS MANDATORY THAT THIS SECONDARY SUPPORT
BE UTILIZED IN DROP CEILINGS FOR SAFETY AND SEISMIC
CONSIDERATIONS.
System Design Considerations
Howmanysubwooferstouse,wheretoplacethem,andatwhat
wattagetotapthemwillbedifferentinalmosteverysituation.
Variablesinclude:
Size of the Room
SpeakerMounting(Ceiling)Height
AmbientNoiseLevel
Type of Music
AvailableSpeakerLocations
Generallyspeaking,separateelectroniccrossoversandamplification
arenotnecessaryfortheFAPSUB.However,incertainhighSPLsitua-
tionstheincreasedefficiencygainedbyusinganactivecrossoverand
dedicatedamplifierisbeneficial.Manyamplifiermanufacturersoffer
plug-in cards to provide this function on their products. A very cost effec-
tivein-lineelectroniccrossoverisalsoavailablefromRDLLabs(Model
ST-CX1W) for use with dedicated amplifiers.
Forcontemporarymusicreproduction,theminimumsubwooferlevel
shouldbesettomatchthevolumeofthefullrangespeakers;however,
forsomehighenergymusicapplicationsthemaximumlevelcouldbeas
muchas10dBlouderthanthefullrangespeakers.
Likeanyspeaker,useoftheboundaryeffectwillincreasetheoutputof
theFAPSUB.Placingtheloudspeakerwithin3'ofawallwillincreasethe
outputby3dB.Placementwithin3'ofacornerwillincreasethelevel
another 3dB (6dB total).
FAPSUB
C-Ring / V-Rails
FAP82-TR
MITEK CORP. © 2008
(preliminary)
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