EMINENCE EPCOPPERA Copperhead – 10″ Speaker 75 W 8 Ohms

Extremely balanced vintage tone with a little country honk and a touch of classic blues tone.

Genre : Country, Blues, Bluegrass, and Funk

SPECIFICATION

• Nominal Basket Diameter 10“, 254 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 75 W / N/A
• Resonance 105 Hz
• Usable Frequency Range 70 Hz - 5 kHz
• Sensitivity 99
• Magnet Weight 20 oz.
• Gap Height 0.312“, 7.92 mm
• Voice Coil Diameter 1.5“, 38.1 mm

THIELE & Samll Parameters

• Resonant Frequency (fs) 105 Hz
• DC Resistance (Re) 7.59
• Coil Inductance (Le) 0.37 mH
• Mechanical Q (Qms) 13.27
• Electromagnetic Q (Qes) 1.05
• Total Q (Qts) 0.98
• Compliance Equivalent Volume (Vas) 27.0 liters / 1.0 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 0cc
• Mechanical Compliance of Suspension (Cms) 0.14 mm/N
• BL Product (BL) 8.8 T-M
• Diaphragm Mass inc. Airload (Mms) 16 grams
• Efficiency Bandwidth Product (EBP) 100
• Maximum Linear Excursion (Xmax) 0.0 mm
• Surface Area of Cone (Sd) 366.1 cm²
• Maximum Mechanical Limit (Xlim) N/A

MOUNTING Information

• Recommended Enclosure Volume
  Sealed Acceptable
  Vented Acceptable
• Overall Diameter 10.11“, 256.8 mm
• Baffle Hole Diameter 9.13“, 231.8 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.23“, 5.7 mm
• Mounting Holes B.C.D. 9.6“, 243.8 mm
• Depth 4.2“, 107 mm

MATERIALS of Construction

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Non-vented core
• Pressed steel basket
• Paper Cone
• Paper cone edge
• Zurette dust cap

• Category of diameter 10 inch / 25 cm
• Magnet type Neodymium
• Shape Cylindrical
• External diametre 261 mm
• Mounting diametre 230 mm
• Basket front tickness 12.5 mm
• Depth 109.5 mm
• Znom 8 ohm
• Brand B&C Speakers
• Type Cone driver
• Impedance 8 ohm
• Voice coil diameter 2.5“
• Sensitivity 98.5dB
• Nominal power handling 200W
• Max power handling 400W
• Fs 61Hz
• Re 5.4ohm
• Zmin 6.2ohm
• Qts 0.31
• Qms 5
• Qes 0.33
• Vas 32L
• Sd 320cm²
• Xmax 4mm
• Mms 29gr
• Le 0.5mH
• Efficiency 3%
• EBP 185
• Frequency range 60-4000 Hz
• Forme suspension Double roll
• Forme membrane Exponential
• Spider Single
• Fil bobine Aluminium
• Voice coil former Glass fiber
• Winding depth 12 mm
• Magnetic gap depth 8 mm
• Recommended load 26 L (tuned ar 67 Hz)
• Shipping weight 2.65kg

Nominal Diameter     250 mm (10 in)
Overall Diameter     256.8 mm (10.1 in)
Bolt Circle Diameter     243.8 mm (9.60 in)
Baffle Cutout Diameter     233.8 mm (9.20 in)
Depth     102 mm (4.02 in)
Flange and Gasket Thickness     8 mm (0.31 in)
Net Weight     2.25 Kg (4.96 lb)
Shipping Box
(Single Carton Box)     140x280x282 mm (5.51x11.02x11.10 in)
Shipping Weight     2.6 Kg (5.73 lb)

Nominal Impedance     8 Ohm
Minimum Impedance     6.8 Ohm
Nominal Power Handling ***     150 W
Maximum Power Handling ****     300 W
Sensitivity (1W/1m)     96 dB
Frequency Range     50÷4500 Hz
Voice Coil Diameter     37 mm (1.46 in)
Winding Material     Al
Former Material     Kapton
Winding Depth     12 mm (0.47 in)
Magnetic Gap Depth     8 mm (0.31 in)
Flux Density     1 T


Fs     55 Hz
Re     5.9 Ohm
Qes     0.7
Qms     9
Qts     0.6
Vas     44 dm^3 (1.55 ft^3)
Sd     327.7 cm^2 (50.79 in^2)
Xmax *     4.67 mm
Xdamage **     10.4 mm
Mms     22.5 g
Bl     8.2 N/A
Le     0.42 mH
Mmd     20 g
Cms     0.3 mm/N
Rms     0.9 Kg/s
Eta Zero     1.4 %
EBP     79 Hz

Nominal Specifications

    Nominal Diameter 10“, 250 mm
    Overall Diameter 10.28“, 261 mm
    Bolt Circle Diameter 9.69“, 246 mm
    Baffle Cutout Diameter 9.06“, 230 mm
    Depth 5.56“, 141.3 mm
    Flange and Gasket Thickness 0.49“, 12.5 mm


Electrical Specifications

    Minimum Impedance 7.3 Ohm
    Nominal Impedance 8 Ohm
    Nominal Power Handling*** 700 W
    Maximum Power Handling**** 1,400 W
    Sensitivity (1W/1m) 96 dB
    Frequency Range 60 - 4000 Hz
    Voice Coil Diameter 4“, 100 mm
    Winding Material Aluminium
    Former Material Glass Fiber
    Winding Depth 0.87“, 22 mm
    Magnetic Gap Depth 0.47“, 12 mm
    Flux Density 1.3 T


THIELE & SMALL Parameters

    Resonant Frequency (fs) 60 Hz
    DC Resistance (Re) 5.5 Ohm
    BL Product (BL) 25.7 N/A
    Diaphragm Mass inc. Airload (Mms) 72.5 grams
    Mechanical Compliance of Suspension (Cms) 0.096 mm/N
    Rms 4.58 Kg/s
    Electromagnetic Q (Qes) 0.22
    Mechanical Q (Qms) 6.01
    Total Q (Qts) 0.23
    Compliance Equivalent Volume (Vas) 0.55 ft³, 15.65 dm³
    Surface Area of Cone (Sd) 52.5“², 339 cm²
    Maximum Linear Excursion (Xmax)* 9 mm
    Xdamage** 12.5 mm
    Coil Inductance (Le) 0.85 mH
    Diaphragm mass (Mmd) 69 g
    Eta Zero 1.46 %

Notes

    *Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
    **Maximum excursion before permanent damage
    ***2 Hours Test According to AES 2-1984 Rev. 2003
    ****Maximum power is defined as 3dB greater than nominal power