Eminence GA-SC64: 12″ Guitar Speaker by George Alessandro
Vintage American ceramic magnet tone approved by legendary amp builder, George Alessandro. Well-balanced from top to bottom with tight, full lows, warm mids, and warm, but open highs.
Eminence and George Alessandro have teamed up once again to develop a 12” guitar speaker with vintage sounds circa 1964, the GA-SC64.Well-balanced from top to bottom, the GA-SC64’s warm, dynamic character lends itself to vintage amps as well as modern gain and distortion. The traditional build materials offer warmth, dynamics, low note articulation and proper distorted harmonic content layering. “The early 1960’s was a time when things were simpler. Studios were recording with one or two analog tape tracks. Stereo records were high tech, and hum canceling pickups were still awaiting a patent.” said George Alessandro, President, Alessandro High-End Products. “The warm, full character of the GA-SC64 brings you back to those days when used in vintage amps. While many things have advanced in 50 years, the tone of 1964 still rings true with this unique guitar speaker.”
Click Here to Download PDF Spec Sheet
| SPECIFICATION | |
| Nominal Basket Diameter | 12″, 305 mm |
| Nominal Impedance* | 8 Ω |
| Power Rating* | |
| Program Power | N/A |
| Watts | 40 W |
| Resonance | 88 Hz |
| Usable Frequency Range | 80 Hz – 5.3 kHz |
| Sensitivity* | 100.5 dB |
| Magnet Weight | 38 oz. |
| Gap Height | 0.313″, 8 mm |
| Voice Coil Diameter | 1.75″, 44 mm |
| THIELE & SMALL PARAMETERS | |
| Resonant Frequency (fs) | 88 Hz |
| DC Resistance (Re) | 7.63 Ω |
| Coil Inductance (Le) | 0.67m H |
| Mechanical Q (Qms) | 16.82 |
| Electromagnetic Q (Qes) | 0.6 |
| Total Q (Qts) | 0.58 |
| Compliance Equivalent Volume (Vas) | 44.96 liters / 1.59 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 83.8 cc |
| Mechanical Compliance of Suspension (Cms) | 0.12 mm/N |
| BL Product (BL) | 13.8 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 27 grams |
| Efficiency Bandwidth Product (EBP) | 146 |
| Maximum Linear Excursion (Xmax) | 1.23 mm |
| Surface Area of Cone (Sd) | 519.5 cm2 |
| Maximum Mechanical Limit (Xlim) | N/A |
| MOUNTING INFORMATION | |
| Recommended Enclosure Volume | |
| Sealed | Acceptable |
| Vented | Acceptable |
| Driver Volume Displaced | 0.071 cu.ft. / 2 liters |
| Overall Diameter | 12.17″, 309.1 mm |
| Baffle Hole Diameter | 11.13″, 282.7 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | N/A |
| Mounting Holes Diameter | 0.24″, 6.1mm |
| Mounting Holes B.C.D. | 11.75″, 298.5mm |
| Depth | 5.13″, 130.2 mm |
| Net Weight | 7.5 lbs, 3.4 kg |
| Shipping Weight | 8.4 lbs, 3.81 kgs |
| MATERIALS OF CONSTRUCTION | |
| Coil Construction | Copper voice coil |
| Coil Former | Paper former |
| Magnet Composition | Ferrite magnet |
| Core Details | Non-vented core |
| Basket Materials | Pressed steel basket |
| Cone Composition | Paper cone |
| Cone Edge Composition | Paper cone edge |
| Dust Cap Composition | Solid composition felt dust cap |
