The Eminence Commonwealth 15" Guitar Speaker delivers warm and rich tone, very clean and well defined. Great presence! Very full and smooth. Very little cone break-up, but likes overdrive.
Good for all genres
Nominal Basket Diameter: 15", 381mm
Nominal Impedance*: 4 ohms
Power Rating**: 225W
Usable Frequency Range: 50Hz-4kHz
Magnet Weight: 109 oz.
Gap Height: 0.29", 7.2mm
Voice Coil Diameter: 4", 101.6mm
Thiele & Small Parameters
Resonant Frequency (fs): 52Hz
DC Resistance (Re): 3.72
Coil Inductance (Le): 0.22mH
Mechanical Q (Qms): 6.75
Electromagnetic Q (Qes): 0.57
Total Q (Qts): 0.53
Compliance Equivalent Volume (Vas): 163 liters / 5.8 cu. ft.
Peak Diaphragm Displacement Volume (Vd): 29cc
Mechanical Compliance of Suspension (Cms): 0.15mm/N
BL Product (BL): 11.8 T-M
Diaphragm Mass inc. Airload (Mms): 65 grams
Efficiency Bandwidth Product (EBP): 91
Maximum Linear Excursion (Xmax): 0.3mm
Surface Area of Cone (Sd): 889.6 cm2
Recommended Enclosure Volume:
Overall Diameter: 15.28", 388.0mm
Baffle Hole Diameter: 14.06", 357.0mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket:
Mounting Holes Diameter: 0.26", 6.5mm
Mounting Holes B.C.D.: 14.57", 370.0mm
Depth: 6", 152mm
Net Weight: 22.6 lbs., 10.3 kg
Shipping Weight: 24.8 lbs., 11.3 kg
Materials of Construction
Aluminum voice coil
Die-cast aluminum basket
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)
7 year parts and labor warranty against defects on all speakers sold under Eminence name.