Eminence ALPHA-6CBMRA: 6.5 Inch Closed Back Midrange
Recommended for pro audio, car audio, and bass guitar midrange applications. Sealed basket affords this speaker enclosure independence.
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| Specification | |
| Nominal Basket Diameter | 6″, 165 mm |
| Nominal Impedance* | 8 Ω |
| Power Rating* | |
| Program Power | 200 W |
| Watts | 100 W |
| Resonance | 407 Hz |
| Usable Frequency Range | 400 Hz – 5 kHz |
| Sensitivity* | 97.8 dB |
| Magnet Weight | 16 oz. |
| Gap Height | 0.25″, 6.4 mm |
| Voice Coil Diameter | 1.5″, 38 mm |
| Thiele & Small Parameters | |
| Resonant Frequency (fs) | 407 Hz |
| DC Resistance (Re) | 5.26 Ω |
| Coil Inductance (Le) | 0.38m H |
| Mechanical Q (Qms) | 6.04 |
| Electromagnetic Q (Qes) | 1.74 |
| Total Q (Qts) | 1.35 |
| Compliance Equivalent Volume (Vas) | 0.45 liters / 0.02 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 19 cc |
| Mechanical Compliance of Suspension (Cms) | 0.02 mm/N |
| BL Product (BL) | 7.86 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 8 grams |
| Efficiency Bandwidth Product (EBP) | 234 |
| Maximum Linear Excursion (Xmax) | 1.5 mm |
| Surface Area of Cone (Sd) | 126.7 cm2 |
| Maximum Mechanical Limit (Xlim) | 3 mm |
| Mounting Information | |
| Recommended Enclosure Volume | |
| Sealed | N/a |
| Vented | – liters / – cu.ft. |
| Driver Volume Displaced | 0.014 cu.ft. / 0.4 liters |
| Overall Diameter | 6.59″, 167.4 mm |
| Baffle Hole Diameter | 5.69″, 144.5 mm |
| Front Sealing Gasket | Yes |
| Rear Sealing Gasket | Yes |
| Mounting Holes Diameter | 0.23″, 5.8mm |
| Mounting Holes B.C.D. | 6.06″, 153.9mm |
| Depth | 2.2″, 55.9 mm |
| Net Weight | 3.7 lbs, 1.68 kg |
| Shipping Weight | 4.4 lbs, 2 kgs |
| Materials of Construction | |
| Coil Construction | Copper voice coil |
| Coil Former | Polyimide former |
| Magnet Composition | Ferrite magnet |
| Core Details | Non-vented core |
| Basket Materials | Pressed steel basket |
| Cone Composition | Paper cone |
| Cone Edge Composition | Cloth cone edge |
| Dust Cap Composition | Solid composition paper dust cap |
