EMINENCE EPCOM12A Commonwealth – 12″ Speaker 225 W 8 Ohms

COMMONWEALTH™ 12

common-wealth n. clean, warm, full, non-distorted, un-adulterated guitar tone.
Coloration : Warm and rich, but also very clean and well defined. Great presence! Very full and smooth. Very little cone
break-up, but likes Overdrive.
Genre : All Genres

• Nominal Basket Diameter 12“, 304.8mm
• Nominal Impedance* 8 ohms
• Power Rating** Watts 225W / Music Program N/A
• Resonance 50Hz
• Usable Frequency Range*** 50Hz-4kHz
• Sensitivity 100
• Magnet Weight 109 oz.
• Gap Height 0.29“, 7.2mm
• Voice Coil Diameter 4“, 101.6mm

• Resonant Frequency (fs) 50Hz
• DC Resistance (Re) 6.34
• Coil Inductance (Le) 0.46mH
• Mechanical Q (Qms) 6.61
• Electromagnetic Q (Qes) 0.35
• Total Q (Qts) 0.33
• Compliance Equivalent Volume (Vas) 90 liters / 3.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 36cc
• Mechanical Compliance of Suspension (Cms) 0.24mm/N
• BL Product (BL) 15.7 T-M
• Diaphragm Mass inc. Airload (Mms) 43 grams
• Efficiency Bandwidth Product (EBP) 143
• Maximum Linear Excursion (Xmax) 0.7mm
• Surface Area of Cone (Sd) 519.5 cm2
• Maximum Mechanical Limit (Xlim) N/A

• Recommended Enclosure Volume
  Sealed Acceptable
  Vented Acceptable
• Overall Diameter 12.28“, 312.0mm
• Baffle Hole Diameter 11.08“, 281.3mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket as standard
• Mounting Holes Diameter 0.27“, 6.8mm
• Mounting Holes B.C.D. 11.69“, 297.0mm
• Depth 5“, 127mm
• Net Weight 21.5 lbs., 9.8 kg
• Shipping Weight 23.2 lbs., 10.5 kg

• Aluminum voice coil
• Polyimide former
• Ferrite magnet
• Vented core
• Die-cast aluminum basket
• Paper Cone
• Cloth cone edge
• Aluminum dust cap

Originally created as a higher-power handling variant of the G12M Greenback, the G12-65 is widely regarded as one of the best speakers ever produced for use in a 4x12 cabinet.

With its fast attack and tightly controlled low-end, the G12-65 became a firm favourite in the ʼ80s with hard rock players. The precisely tuned midrange and crisp defined top-end contribute to an aggressive crunch sound that punches through the mix while the mid-range warmth and detail give weight and depth to single notes.

• Nominal Basket Diameter 12", 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 250 W / Music Program 500 W
• Resonance 47 Hz
• Usable Frequency Range 43 Hz - 3.8 kHz
• Sensitivity 98
• Magnet Weight 38 oz.
• Gap Height 0.312", 7.92 mm
• Voice Coil Diameter 2", 50.8 mm

• Resonant Frequency (fs) 47 Hz
• DC Resistance (Re) 5.0
• Coil Inductance (Le) 0.64 mH
• Mechanical Q (Qms) 6.00
• Electromagnetic Q (Qes) 0.50
• Total Q (Qts) 0.46
• Compliance Equivalent Volume (Vas) 120.1 liters / 4.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 237 cc
• Mechanical Compliance of Suspension (Cms) 0.29 mm/N
• BL Product (BL) 10.8 T-M
• Diaphragm Mass inc. Airload (Mms) 40 grams
• Efficiency Bandwidth Product (EBP) 94
• Maximum Linear Excursion (Xmax) 4.4 mm
• Surface Area of Cone (Sd) 538.9 cm²
• Maximum Mechanical Limit (Xlim) 11 mm

• Recommended Enclosure Volume Sealed 25.5-35.4 liters, 0.9-1.25 cu.ft. Vented 36.8-139 liters/1.3-4.9 cu.ft.
• Overall Diameter 12.03", 305.5 mm
• Baffle Hole Diameter 10.95", 278.1 mm
• Front Sealing Gasket standard fitted as standard
• Rear Sealing Gasket standard fitted as standard
• Mounting Holes Diameter 0.25", 6.4 mm
• Mounting Holes B.C.D. 11.59", 294.3 mm
• Depth 4.57", 116 mm

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Vented and extended core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition paper dust cap

This classic guitar speaker actually started life as a radio speaker that was modified specifically for use in electric guitar amplifiers. In its original incarnation as the G12 T530 it appeared in several colour variations, but it was the Blue version, fitted as standard into Vox AC30 amps, that secured its place in guitar tone history.

The Blue found favour with notable guitarists like Brian May, due to its glorious dampened attack, warm lows, mellow upper-mids and brilliant belllike top-end. When coupled with a suitable amplifier it evokes rich definition and develops beautiful musical compression when pushed. According to tone enthusiasts worldwide, the Blue is the benchmark for guitar speaker perfection.