Eminence Eric Johnston Signature EJ1240 12" Speaker 40 Watts 8 Ohm

Eric Johnson, George Alessandro and Eminence have teamed up once again to reinvent vintage tone. Through a reformulated paper cone and optimized basket design, the 40 watt EJ-1240 offers vintage Alnico tone with tight, punchy lows, nice lower-mid growl.

SPECIFICATION
Nominal Basket Diameter	12", 305 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	N/A
Watts	40 W
Resonance	75 Hz
Usable Frequency Range	80 Hz - 5 kHz
Sensitivity*	100.7 dB
Magnet Weight	35 oz.
Gap Height	0.313", 8 mm
Voice Coil Diameter	1.75", 44 mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)	75 Hz
DC Resistance (Re)	7 Ω
Coil Inductance (Le)	0.6m H
Mechanical Q (Qms)	20.09
Electromagnetic Q (Qes)	0.54
Total Q (Qts)	0.53
Compliance Equivalent Volume (Vas)	71.19 liters / 2.51 cu.ft.
Peak Diaphragm Displacement Volume (Vd)	64.4 cc
Mechanical Compliance of Suspension (Cms)	0.19 mm/N
BL Product (BL)	12.08 T-M
Diaphragm Mass Inc. Airload (MMs)	24 grams
Efficiency Bandwidth Product (EBP)	140
Maximum Linear Excursion (Xmax)	1.24 mm
Surface Area of Cone (Sd)	519.5 cm2
Maximum Mechanical Limit (Xlim)	N/A
MOUNTING INFORMATION
Recommended Enclosure Volume
Sealed	Acceptable
Vented	Acceptable
Driver Volume Displaced	0.079 cu.ft. / 2.24 liters
Overall Diameter	12.17", 309.1 mm
Baffle Hole Diameter	11.13", 282.7 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.24", 6.1mm
Mounting Holes B.C.D.	11.75", 298.5mm
Depth	6.25", 158.8 mm
Net Weight	8.4 lbs, 3.81 kg
Shipping Weight	10.2 lbs, 4.63 kgs
MATERIALS OF CONSTRUCTION
Coil Construction	Copper voice coil
Coil Former	Paper former
Magnet Composition	Alnico magnet
Core Details	Non-vented core

Basket Materials	Pressed steel basket
Cone Composition	Paper cone
Cone Edge Composition	Paper cone edge
Dust Cap Composition	Zurette dust cap

Eminence Eric Johnston Signature EJ1240 12" Speaker 40 Watts 8 Ohm

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