Eminence Legend BP 122 - 8 ohm 12" 250W Bass Guitar Speaker

A 12" bass guitar driver that delivers warm, rich tone and deep bass. A big brother to the popular 10" Legend BP102, this 250 watt driver is at home in small sealed enclosures, and also works well in Pro Audio and Home Hi-Fi applications.

Manufacturer Spec Sheet

Example Cabinet Designs

Speaker Detail

Specification
Nominal Basket Diameter	12", 305 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	500 W
Watts	250 W
Resonance	35 Hz
Usable Frequency Range	35 Hz - 2.3 kHz
Sensitivity*	94.1 dB
Magnet Weight	38 oz.
Gap Height	0.31", 7.9 mm
Voice Coil Diameter	2", 51 mm
Thiele & Small Parameters
Resonant Frequency (fs)	35 Hz
DC Resistance (Re)	5.66 Ω
Coil Inductance (Le)	0.84m H
Mechanical Q (Qms)	9.26
Electromagnetic Q (Qes)	0.57
Total Q (Qts)	0.54
Compliance Equivalent Volume (Vas)	157.4 liters / 5.56 cu.ft.
Peak Diaphragm Displacement Volume (Vd)	330.1 cc
Mechanical Compliance of Suspension (Cms)	0.4 mm/N
BL Product (BL)	10.55 T-M
Diaphragm Mass Inc. Airload (MMs)	50 grams
Efficiency Bandwidth Product (EBP)	62
Maximum Linear Excursion (Xmax)	6.2 mm
Surface Area of Cone (Sd)	532.4 cm2
Maximum Mechanical Limit (Xlim)	12.4 mm
Mounting Information
Recommended Enclosure Volume
Sealed	Acceptable
Vented	Acceptable
Driver Volume Displaced	0.071 cu.ft. / 2 liters
Overall Diameter	12.26", 311.4 mm
Baffle Hole Diameter	11.08", 281.4 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.25", 6.4mm
Mounting Holes B.C.D.	11.71", 297.4mm
Depth	5.33", 135.3 mm
Net Weight	9 lbs, 4.08 kg
Shipping Weight	11 lbs, 4.99 kgs
Materials of Construction
Coil Construction	Copper voice Coil
Coil Former	Polyimide former
Magnet Composition	Ferrite magnet
Core Details	Non-vented core
Basket Materials	Pressed Steel basket
Cone Composition	Paper cone
Cone Edge Composition	Cloth cone edge
Dust Cap Composition	Solid composition felt dust cap