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Eminence :: Eminence Loudspeaker Drivers :: Eminence 12 Inch Drivers
Eminence Beta 12LT - 12" 225W 8 Ohm
SPL: 97.7 1W/1m Fs: 45 Hz Xmax: 3.2mm

was £70.48
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Each Eminence American Standard model can be identified by its economical Stamped Steel chassis. Although more affordable than cast aluminium, these frames provide an excellent and versatile chassis. Eminence coat each basket and all metal components with an epoxy-acrylic finish using their in-house e-coat process. The thickness of that coating is controlled to within 0.001"; critical when working with close tolerance transducer motor designs. They then add front and rear sealing gaskets on each model to accommodate front or rear loading.

There are 24 unique models available in the American Standard series. Each was designed for versatility in a range of applications. From 6.5-15" models with applications ranging from standard sub-woofers, two-way enclosures, and coaxials, to truncated line array models, monitor woofers, and high performance midranges setting records for output in car audio, no other loudspeaker line provides more choices, power handling, performance, and reliability for the price. With over 1,200 USA dealers and distributors worldwide you can easily find them in a store near you.

Application Notes: Twin Cone speaker for full range output in compact PA systems. The second cone gives extended high frequency response up to a useful 8Khz.

Also recommended for extended-range musical instrument systems, such as keyboards or acoustic guitar.


  • Nominal Basket Diameter 12", 304.8mm
  • Nominal Impedance* 8 ohms
  • Power Rating**
  • Watts 225W
  • Music Program 450W
  • Resonance 45Hz
  • Usable Frequency Range 48Hz - 8kHz
  • Sensitivity*** 97.7dB
  • Magnet Weight 38 oz.
  • Gap Height 7.92mm
  • Voice Coil Diameter 50.8mm

Thiele & Small Parameters:

  • Resonant Frequency (fs) 45Hz
  • DC Resistance (Re) 7.37
  • Coil Inductance (Le) 0.83mH
  • Mechanical Q (Qms) 6.44
  • Electromagnetic Q (Qes) 0.55
  • Total Q (Qts) 0.51
  • Compliance Equivalent Volume (Vas) 136.3 litres / 4.8 cu.ft.
  • Peak Diaphragm Displacement Volume (Vd) 170cc
  • Mechanical Compliance of Suspension (Cms) 0.34mm/N
  • BL Product (BL) 11.7 T-M
  • Diaphragm Mass Inc. Airload (MMs) 36 grams
  • Efficiency Bandwidth Product (EBP) 82
  • Maximum Linear Excursion (Xmax) 3.2mm
  • Surface Area of Cone (Sd) 532.4 cm2
  • Maximum Mechanical Limit (Xlim) 8mm

Mounting Information:

  • Recommended Enclosure Volume
  • Sealed 14-51 litres
  • Vented 56.6-116 litres
  • Driver Volume Displaced 2 litres
  • Overall Diameter 305.5mm
  • Baffle Hole Diameter 278.1mm
  • Front Sealing Gasket Fitted as standard
  • Rear Sealing Gasket Fitted as standard
  • Mounting Holes Diameter 6.4mm
  • Mounting Holes B.C.D. 294.3mm
  • Depth 114mm
  • Net Weight 3.7 kg
  • Shipping Weight 4.6 kgs

Materials of Construction:

  • Coil Construction Copper voice coil
  • Coil Former Polyimide former
  • Magnet Composition Ferrite magnet
  • Core Details Vented core
  • Basket Materials Pressed steel basket
  • Cone Composition Paper Cone
  • Cone Edge Composition Cloth cone edge
  • Dust Cap Composition Solid composition paper dust cap