The Eminence EJ1250 Eric Johnson Signature Guitar Speaker provides 50 watts of pure vintage alnico tone with a modern twist. American and British characteristics, punchy lows, warm throaty mids, and articulate highs are what you can expect from the EJ1250 Eric Johnson Signature speaker from Eminence. Made by hand right here in the USA.

MPN: EJ-1250

• Nominal Basket Diameter: 12 inch
  
• Nominal Impedance: 16 ohms
  
• Power Rating: 50 watts
  
• Resonance: 84.78Hz
  
• Usable Frequency Range: 80Hz - 5.1kHz
  
• Sensitivity: 100.8dB
  
• Magnet Weight: 35 oz.
  
• Gap Height: 0.31 inch, 7.95mm
  
• Voice Coil Diameter: 1.75 inches, 44.45mm
  
• Thiele and Small Parameters:
  
• Resonant Frequency (fs): 84.78Hz
  
• DC Resistance (Re): 14.4
  
• Coil Inductance (Le): 0.98mH
  
• Mechanical Q (Qms): 20.1
  
• Electromagnetic Q (Qes): 0.73
  
• Total Q (Qts): 0.71
  
• Compliance Equivalent Volume (Vas): 48.71 liters / 1.72 cu.ft.
  
• Peak Diaphragm Displacement Volume (Vd): 62.34cc
  
• Mechanical Compliance of Suspension (Cms): 0.13mm/N
  
• BL Product (BL): 16.95 T-M
  
• Diaphragm Mass Inc. Airload (MMs): 27.45 grams
  
• Efficiency Bandwidth Product (EBP): 115.6
  
• Maximum Linear Excursion (Xmax): 1.2mm
  
• Surface Area of Cone (Sd): 519.5 cm2
  
• Maximum Mechanical Limit (Xlim): N/A
  
• Mounting Information:
  
• Driver Volume Displaced: 136.7 cu.in. / 2.24 liters
  
• Overall Diameter: 12.02 inches, 305.31mm
  
• Baffle Hole Diameter: 10.97 inches, 278.64mm
  
• Front Sealing Gasket: Fitted as standard
  
• Mounting Holes Diameter: 0.25 inch, 6.35mm
  
• Mounting Holes B.C.D.: 11.63 inch, 295.4mm
  
• Depth: 6.22 inches, 157.98mm
  
• Weight: 8.5 lbs, (3.86 kg)
  
• Materials Of Construction:
  
• Coil Construction: Copper
  
• Coil Former: Paper
  
• Magnet Composition: Alnico
  
• Core Details: Non-vented
  
• Basket Materials: Pressed steel
  
• Cone Composition: Paper
  
• Cone Edge Composition: Paper
  
• Dust Cap Composition: Zurette