Speaker - Eminence®, 12", EJ-1240, 40W, 8Ω, Alnico

Speaker - Eminence®, 12", EJ-1240, 40W, 8Ω, Alnico image 1
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Speaker - Eminence®, 12", EJ-1240, 40W, 8Ω, Alnico

Note: special order items require additional lead time. See our page on special order items.

Special Order Item

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 grow

Item ID:
Part Numbers
ImpedanceOur Part Number
8 ΩP-A-EJ-1240-8
16 ΩP-A-EJ-1240-16
Product Measurements
Baffle Hole Diameter11.13 in.
Basket MaterialPressed Sheet Steel
Coil Constructioncopper voice coil
Coil FormerPaper former
Coil Inductance (le)0.6 mH
Cone CompositionPaper cone
Cone Edge CompositionPaper cone edge
Core DetailsNon-vented core
D.C. Resistance (Re) 7 Ω
Depth6.25 in.
Driver Volume Displaced2.24 liters
Dust Cap CompositionZurette dust cap
Efficiency Bandwidth Product (ebp)140
Electrical Q Factor (Qes)0.54
Equivalent Acoustic Volume (VAS)71.19 liters
Force Factor (BxL)12.08 Wb/m
Front Sealing GasketYes
Gap Height8 mm
Linear Displacement, maximum (XMAX)1.24 mm
Magnet CompositionAlnico magnet
Magnet Weight35 oz.
Mechanical Compliance (CMS)0.19 mm/N
Mechanical Moving Mass (MMS)24 g
Mechanical Q Factor (QMS)20.09
Mounting Hole Bolt Circle Diameter298.5 mm
Mounting Hole Diameter6.1 mm
Nominal Basket Diameter12 in.
Nominal Impedance8 Ω
Overall Diameter309.1 mm
Peak Diaphragm Displacement Volume (vd)64.4 cm3
Power Rating40 W
Rear Sealing GasketYes
Recommended Enclosure Volume, sealedAcceptable
Recommended Enclosure Volume, ventedAcceptable
Resonance75 Hz
Resonance Frequency (ƒS)75 Hz
Sensitivity100.7 dB
Surface Area Of Cone (sd)519.5 cm2
Total Q Factor (QTS)0.53
Usable Frequency Range80 Hz - 5 kHz
Voice Coil Diameter1.75 in.
Packaging Information
Packaging Dimensions13 in. × 13 in. × 6.5 in.
Weight (Packaging)10.2 lbs.

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