Eminence DELTAPRO18A 18In Rawframe Speaker

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    Eminence DELTAPRO18A 18" Rawframe Speaker

    Long throw subwoofer for very small vented boxes. Over-sized top plate and large pole vent help keep the coil cool.

    • Nominal Basket Diameter: 18", 457mm
    • Nominal Impedance: 8 ohms
    • Power Rating: Watts: 500W; Music Program: 1000W
    • Resonance: 28Hz
    • Usable Frequency Range: 37Hz - 0.25kHz
    • Sensitivity: 96dB
    • Magnet Weight: 67 oz.
    • Gap Height: 0.38", 9.53mm
    • Voice Coil Diameter: 2.5", 63.5mm
    Thiele & Small Parameters
    • Resonant Frequency (fs): 28Hz
    • DC Resistance (Re): 5.3
    • Coil Inductance (Le): 3.43mH
    • Mechanical Q (Qms): 10.38
    • Electromagnetic Q (Qes): 0.33
    • Total Q (Qts): 0.32
    • Compliance Equivalent Volume (Vas): 493.2 liters / 17.41 cu.ft.
    • Peak Diaphragm Displacement Volume (Vd): 796cc
    • Mechanical Compliance of Suspension (Cms): 0.25mm/N
    • BL Product (BL): 18.9 T-M
    • Diaphragm Mass Inc. Airload (MMs): 128 grams
    • Efficiency Bandwidth Product (EBP): 84
    • Maximum Linear Excursion (Xmax): 6.7mm
    • Surface Area of Cone (Sd): 1188 cm2
    • Maximum Mechanical Limit (Xlim): 15mm
    Mounting Information
    • Recommended Enclosure Volume: Sealed: N/a; Vented: 85-297 liters / 3-10.5 cu.ft.
    • Driver Volume Displaced: 367 cu.in. / 6.01 liters
    • Overall Diameter: 18", 457.2mm
    • Baffle Hole Diameter: 16.57", 420.9mm
    • Front Sealing Gasket: Fitted as standard
    • Rear Sealing Gasket: Fitted as standard
    • Mounting Holes Diameter: 0.28", 7.1mm
    • Mounting Holes B.C.D.: 17.25", 438.2mm
    • Depth: 8.13", 207mm
    • Net Weight: 17 lbs, 7.7 kg
    • Shipping Weight: 20.5 lbs, 9.3 kgs
    Materials of Construction
    • Coil Construction: Copper voice coil
    • Coil Former: Polyimide former
    • Magnet Composition: Ferrite magnet
    • Core Details: Vented and extended core
    • Basket Materials: Die-cast aluminum basket
    • Cone Composition: Paper cone
    • Cone Edge Composition: Cloth cone edge
    • Dust Cap Composition: Solid composition paper dust cap


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