|
20882 |
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|
| Materials of construction |
 |
Kapton coil former |
| |
Polyamide-imide coated copper voice coil |
| |
APS ferrite magnet |
| |
Closed-back pressed steel chassis |
| |
Paper cone |
| |
Plasticised cloth (linen) cone edge |
| |
Solid composition paper dust dome |
| Ideal for building into bass enclosures to extend the range of a cabinet, creating an economical two-way system. The closed-back chassis does not need a separate enclosure. |
| Eminence Model No. |
Alpha 8MR |
| Nominal Chassis Diameter: |
8 . 203.2mm |
| Impedance: |
8 |
| Usable Frequency Range: |
500Hz to 5kHz |
| Average Sensitivity 1W @ 1m: |
102dB |
| Magnet Gap Depth: |
0.25 , 6.35mm |
| Voice Coil Diameter: |
1.5 , 38.1mm |
| Overall Diameter: |
8 , 203.2mm |
| Baffle Hole Diameter: |
7.375 , 187.3mm |
| Front Sealing Gasket: |
fitted as standard |
| Rear Sealing Gasket: |
fitted as standard |
| Fixing Holes Diameter (8 off): |
0.275 , 7mm |
| Fixing Hole P.C.D.: |
7.75 , 196.9mm |
| Shipping Weight: |
4.4lbs, 2.00kg |
| Resonant Frequency |
(fs): |
547.40Hz |
| Impedance |
(Re): |
7.08 |
| Coil Inductance |
(Le): |
0.14mH |
| Electromagnetic Q |
(Qes): |
2.06 |
| Compliance Equivalent Volume |
(Vas): |
21.5 litres |
| Displacement Volume |
(Vd): |
0.00cc |
| of Suspension |
(Cms): |
0.0119mm/N |
| BL Product |
(BL): |
9.18 T-M |
| Diaphragm Mass inc. Airload |
(Mms): |
7.13grams |
| Mechanical Suspension Loss |
(Rms): |
3.5918N*sec/M |
| Efficiency Bandwidth Product |
(EBP): |
65.0 |
| Voice Coil Overhang |
(Xmax): |
0.00mm |
| Surface Area of Cone |
(Sd): |
218.08cm2 |
| Impedance at Resonance |
(Zmax): |
30.5 |
|
