audio art 254SW II Service manual

254SW II 10" Subwoofer
Technical Hot Line [phone]
Monday - Friday 9:00 AM-5:00 PM P.S.T.
Audio Art, Inc.
152 S. Brent Circle
City of Industry, CA 91789
[phone] Fax [phone]
Installation Instructions / Owner's Manual
www.audioart.net

INTRODUCTION
Congratulations on your purchase of an Audio Art state-of-the-art subwoofer component.
YourselectionofanAudioArtcaraudioproductindicatesatrueappreciationoffinemusical
reproduction. WhetheraddingtoanexistingsystemorincludingaAudioArtsubwooferina
newsystem,youarecertaintonoticeimmediateperformancebenefits.
KEEP YOUR SALES RECEIPT
Takethis timeto attachyour salesreceipt tothe manualand putin asafe place.In caseof any
unforeseen reason this product may need warranty service, your receipt will be necessary to
establish purchase date. For detailed warranty information please refer to the enclosed
warrantycard.
RECOMMENDATION
A speaker's performance is only as good as it's enclosure. Proper installation, enclosure size
and crossover frequency will maximize the overall performance of the subwoofer. To
properly design and build an enclosure, knowledge of woodworking as well as the proper
toolsarerequired.Wehighlyrecommendthatyouhaveyourenclosurebuiltbyanauthorized
Audio Art retailer. However, if you decide to install it yourself, we have included the
parameters of each driver and recommended enclosure sizes. If after reviewing the enclosed
informationyouhaveanyadditionalquestions,pleasefeelfreetocontactourtechnicaldept.
Technical Hot Line [phone]
Monday - Friday 9:00 AM-5:00 PM P.S.T.
WARNING!
Exposure to high sound pressure levels can cause hearing loss or damage.
Listeningto yoursystem atloud levelswhile driving,will impairyour ability
to hear traffic sounds and emergency vehicles. Use common sense when
listeningtoyoursystem.
When installing your subwoofer enclosure in the vehicle, securely fasten it
to the frame or floorpan. If the enclosure is not secured properly, there is
danger of it becoming a projectile in a collision.
Audio Art 254SW II
Due to continuing product improvement, specifications and design are subject to change without notice.

CALCULATING ENCLOSURES
It is difficult to give exact box dimensions that are universal for all cars and trucks. It is for
this reason that you must be able to calculate the space in which you have available in order
toachievetheproperairvolumerequired.
It is recommended to build your enclosure from 3/4" thick MDF (medium density
fiberboard).Makesuretheenclosureissealedairtight.
CalculatingExternalVolume
1.) To calculate box volume, measure the outside Width x Height x Depth of the
enclosure.Example12"x14"x9"=1512".
2.) Next you must convert cubic inches into cubic feet. To do this, you must divide
thecubicinchtotalby1728".Example1512÷1728=.875Cubicfeet
CalculatingInternalVolume
1.) To calculate the internal (net) volume of the above box you must first multiply
the thickness of the wood you are using by Two (2). Example 3/4" x 2 = 1.5".
2.) Nextsubtract1.5fromeachoftheoutsidemeasurementsofthebox.
Width Height Depth
12-1.5=10.5 14-1.5=12.5 9-1.5=7.5
3.) Multiplythenewtotals(HxWxD)Example:10.5x12.5x7.5=984.375
4.) Next you must convert cubic inches into cubic feet. To do this, you must divide
thecubicinchtotalby1728"Example984.375÷1728=.5696Cubicfeet.
PRODUCT SPECIFICATIONS
Free Air Resonance. (FS) 23
Total Q of driver @ FS including all resistances. (Qts) .45
Q of driver @ FS including non electrical resistance only. (Qms) 7.69
Q of driver @ FS including electrical resistance only. (Qes) .48
The driver's compliance expressed as an equivalent volume
of air (Cubic Ft.). (Vas) 3.78
The driver's linear displacement (inches). (Xmax) .34
The DC resistance of the driver's voice coil (ohms). (Re) 3.8
Thermal power rating of driver (R.M.S./Peak). (Pe) 100 / 200
The driver's voice coil inductance (millihenries). (Le) 1.15
The drivers sensitivity (dB). (Sens) 87
Audio Art 254SW II

254SW II Amplitude Response (dB/Hz)254SW II Amplitude Response (dB/Hz) Ported EnclosurePorted Enclosure
5050 100100 500500 10001000
FrequencyFrequency
5 Hz5 Hz 1010
00
dBdB
66
1212
-6-6
-12-12
-18-18
-24-24
F3 = 34.5F3 = 34.5
Ported Enclosure
Box Volume *1.59 Cu Ft.
Port Frequency (Fb) 30.6 Hz
Port Diameter 2.5 Inches
Port Length 7.5 Inches
* Box is given as internal air volume including port and driver displacement.
FrequencyFrequency
254SW II Amplitude Response (dB/Hz)254SW II Amplitude Response (dB/Hz) Sealed EnclosureSealed Enclosure
5 Hz5 Hz 1010 5050 100100 500500 10001000
00
dBdB
66
1212
-6-6
-12-12
-18-18
-24-24
F3 = 42.6F3 = 42.6
RECOMMENDED ENCLOSURES
PleaseNote:Oursuggestedboxvolumesaregivenasinternalairrequirements
Sealed Enclosure
Box Volume * .75 Cu Ft.
* Box is given as internal air volume including driver
displacement.
Audio Art 254SW II