- Voice Coil Diameter: 4", 101.6mm
- Magnet Weight: 109 oz.
- Power Rating.: 225W
- Sensitivity: 100
Eminence Commonwealth 12" Guitar Speaker
The Eminence Commonwealth 12" Guitar Speaker delivers warm and rich tone that is very clean and well defined. Great presence! Very full and smooth. Very little cone break-up, but likes Overdrive. Clean, warm, full, non-distorted, un-adulterated guitar tone for all genres.
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- Specification
- Nominal Basket Diameter: 12", 304.8mm
- Nominal Impedance*: 8 ohms
- Power Rating**: 225W
- 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
Thiele & Small Parameters - 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
Mounting Information - 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:
- 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
Materials of Construction - Aluminum voice coil
- Polyimide former
- Ferrite magnet
- Vented core
- Die-cast aluminum basket
- Paper Cone
- Cloth cone edge
- Aluminum dust cap
*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)
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