DELTA PRO-12A




SPECIFICATION




Nominal Basket Diameter
12", 304.8mm


Nominal Impedance*
8 ohms


Power Rating



Watts
400W


Music Program
800W


Resonance
51Hz


Usable Frequency Range
52Hz-4.5kHz


Sensitivity***
99.2


Magnet Weight
80 oz.


Gap Height
0.375", 9.53mm


Voice Coil Diameter
2.5", 63.5mm






THIELE & SMALL PARAMETERS



Resonant Frequency (fs)
51Hz





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Download PDF Cabinet Design



 



DC Resistance (Re)
5.71


Coil Inductance (Le)
0.84mH


Mechanical Q (Qms)
7.56


Electromagnetic Q (Qes)
0.37


Total Q (Qts)
0.35


Compliance Equivalent Volume (Vas)
81.7 liters / 2.9 cu.ft.


Peak Diaphragm Displacement Volume (Vd)
242cc


Mechanical Compliance of Suspension (Cms)
0.21mm/N


BL Product (BL)
15.3 T-M


Diaphram Mass inc. Airload (Mms)
48 grams


Efficiency Bandwidth Product (EBP)
138


Maximum Linear Excursion (Xmax)
4.6mm


Surface Area of Cone (Sd)
532.4 cm2



Maximum Mechanical Limit (Xlim)
13.7mm








MOUNTING INFORMATION




Recommended Enclosure




Sealed
28-35 liters/1-1.25 cu.ft.



Vented
31-91 liters/1.1-3.2 cu.ft.



Overall Diameter
12.38", 314.5mm



Baffle Hole Diameter
11.07", 281mm



Front Sealing Gasket
Fitted as standard



Rear Sealing Gasket
Fitted as standard



Mounting Holes Diameter
0.27", 6.9mm



Mounting Holes B.C. D.
11.57", 293.8mm



Depth
6.22", 158mm



Net Weight
16.3 lbs., 7.4 kg



Shipping Weight
18 lbs., 8.2 kg








MATERIALS OF CONSTRUCTION




Coil Construction
Aluminum voice coil



Coil Former
Polyimide former



Magnet Composition
Ferrite magnet



Core Details
Vented and extended core



Basket Materials
Die-cast aluminum basket



Cone Composition
Paper Cone



Cone Edge Composition
Cloth cone edge



Dustcap Composition
Solid composition paper dust cap