one guitarist defines vintage tone. One speaker delivers it.

one guitarist defines vintage tone.
One speaker delivers it.
the Eminence EJ1250.
Vintage alnico tone for the purist in you. Made by hand in the USA.
mounting information
Nominal Basket Diameter
12”, 304.8 mm
Nominal Impedance*
8 ohm
Power Rating**
50 W
89.98 Hz
Driver Volume Displaced
136.70 / 2.24 liters
Usable Frequency Range
80 Hz - 5.1 kHz
Overall Diameter
12.02’’ / 305.31mm
100.9 dB
Baffle Hole Diameter
10.97’’ / 278.64mm
Magnet Weight
35 oz.
Front Sealing Gasket
Fitted as standard
Gap Height
0.31”, 7.95 mm
Rear Sealing Gasket
Voice Coil Diameter
1.75”, 44.45 mm
Mounting Holes Diameter
0.25’’ / 6.35mm
Mounting Holes B.C.D.
11.63’’ / 295.40mm
6.22” / 157.98mm
materials of construction
Recommended Enclosure Volume
Coil Construction
Copper voice coil
Net Weight
8.50 lbs / 3.86 kg
Coil Former
Paper former
Shipping Weight
11.10 lbs / 5.00 kg
Magnet Composition
Alnico magnet
Core Details
Non-vented core
Basket Material
Pressed steel basket
Cone Composition
Paper cone
Cone Edge Composition
Paper cone edge
Dust Cap Composition
Zurette dust cap
eric johnson
Thiele & small parameters
Resonant Frequency
(fs) 89.98 Hz
DC Resistance
(Re) 7.19
Coil Inductance
(Le) 0.62 mH
Mechanical Q
(Qms) 12.41
Electromagnetic Q
(Qes) 0.65
Total Q
(Qts) 0.62
Compliance Equivalent Volume
(Vas) 44.96 liters / 1.59 cu.ft.
Peak Diaphragm Displacement Volume
(Vd) 62.34 cc
Mechanical Compliance of Suspension
(Cms) 0.12 mm/N
BL Product
(BL) 12.91 T-M
Diaphragm Mass Inc. Airload
(Mms) 26.55 grams
Efficiency Bandwidth Product
(EBP) 139.05
Maximum Linear Excursion
(Xmax) 1.20 mm
Surface Area of Cone
(Sd) 519.50 cm2
Maximum Mechanical Limit
* Please inquire about alternative impedances.
** Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, non-temperature controlled environment.
*** The average output across the usable frequency range when applying 1W/1M into the nominal impedance. Ie: 2.83V/8ohms, 4V/16ohms.
Eminence response curves are measured under the following conditions: All speakers are tested at 1w/1m using a variety of test set-ups for the appropriate impedance | LMS using 0.25” supplied microphone (software calibrated) mounted 1m from
wall/baffle | 2ft. X 2ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Hafler P1500 Trans-Nova amplifier | 2700 cu.ft. chamber with fiberglass on all six surfaces (three with custom-made wedges)
photo ©
max crace
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