Peerless 850 571 Mid Woofer 4″ Hi – Fi CSC LINE (Pair)

Specifications Power (RMS): 110 Watt Impadence :
4 Ohm Megaphone Depth: 57mm Hole Diameter :
100 mm Sensitivity :
90 db Size :
4 Inches

• Nominal Basket Diameter: 5“, 127 mm
• Nominal Impedance*: 8 Ω
• Power Rating**
• Watts: 65 W
• Music Program: 130 W
• Resonance: 223 Hz
• Usable Frequency Range: 325 Hz - 20 kHz
• Sensitivity***: 93.1 dB
• Magnet Weight: 4 oz.
• Gap Height: 0.236“, 6 mm
• Voice Coil Diameter: 1“, 25 mm

• Resonant Frequency (fs): 223 Hz
• DC Resistance (Re): 5.45 Ω
• Coil Inductance (Le): 0.18m H
• Mechanical Q (Qms): 2.8
• Electromagnetic Q (Qes): 0.93
• Total Q (Qts): 0.7
• Compliance Equivalent Volume (Vas): 0.85 liters / 0.03 cu.ft.
• Peak Diaphragm Displacement Volume (Vd): 3.6 cc
• Mechanical Compliance of Suspension (Cms): 0.12 mm/N
• BL Product (BL): 5.84 T-M
• Diaphragm Mass Inc. Airload (MMs): 4 grams
• Efficiency Bandwidth Product (EBP): 239
• Maximum Linear Excursion (Xmax): 0.51 mm
• Surface Area of Cone (Sd): 71.3 cm2
• Maximum Mechanical Limit (Xlim): 5.0 mm

• Recommended Enclosure Volume
• Sealed: 0.85-1.56 liters / 0.03-0.06 cu.ft.
• Vented: - liters / - cu.ft.
• Driver Volume Displaced: 0.494 cu.ft. / 14 liters
• Overall Diameter: 5.25“, 133.4 mm
• Baffle Hole Diameter: 4.28“, 108.7 mm
• Front Sealing Gasket: Yes
• Rear Sealing Gasket: Yes
• Mounting Holes Diameter: 0.18“, 4.6mm
• Mounting Holes B.C.D.: 4.79“, 121.7mm
• Depth: 2.16“, 54.8 mm
• Net Weight: 2 lbs, 0.91 kg
• Shipping Weight: 2.2 lbs, 1 kgs

• Coil Construction: Pure aluminum voice coil
• Coil Former: Kapton former
• Magnet Composition: Neodymium magnet
• Core Details: Vented and Extended core
• Basket Materials: Die-cast aluminum basket
• Cone Composition: Treated paper cone
• Cone Edge Composition: Cloth cone edge
• Dust Cap Composition: Treated paper dust cap

Nominal Specifications

    * Nominal Diameter 5“, 130 mm
    * Overall Diameter 6.02/5.51“, 153/140 mm
    * Bolt Circle Diameter 5.5“, 139 mm
    * Baffle Cutout Diameter 5.04“, 128 mm
    * Depth 3.1“, 79 mm
    * Flange and Gasket Thickness 0.29“, 7.5 mm


Electrical Specifications

    * Minimum Impedance 8.8 Ohm
    * Nominal Impedance 12 Ohm
    * Nominal Power Handling*** 80 W
    * Maximum Power Handling**** 160 W
    * Sensitivity (1W/1m) 99 dB
    * Frequency Range 180 - 6300 Hz
    * Voice Coil Diameter 1.26“, 32 mm
    * Winding Material Copper
    * Former Material Kapton
    * Winding Depth 0.29“, 7.5 mm
    * Magnetic Gap Depth 0.24“, 6 mm
    * Flux Density 1.65 T


THIELE & Small Parameters

    * Resonant Frequency (fs) 180 Hz
    * DC Resistance (Re) 7.2 Ohm
    * Coil Inductance (Le) 0.15 mH
    * Mechanical Q (Qms) 2.70
    * Electromagnetic Q (Qes) 0.59
    * Total Q (Qts) 0.48
    * Compliance Equivalent Volume (Vas) 0.033 ft³, 0.93 dm³
    * Mechanical Compliance of Suspension (Cms) 0.075 mm/N
    * Rms 3.93 Kg/s
    * BL Product (BL) 11.3 N/A
    * Diaphragm Mass inc. Airload (Mms) 8.4 grams
    * Maximum Linear Excursion (Xmax)* 2.75 mm
    * Xdamage** 15.2 mm
    * Surface Area of Cone (Sd) 14.6“², 94.3 cm²
    * Diaphragm mass (Mmd) 7.5 g
    * Eta Zero 1.23 %


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

• 91 dB sensitivity 1 W / 1 m
• 130 W + 60 W Power Handling
• 1.5" + 1.5“ Copper Voice Coil
• Single Point Source providing coherent Wave Front
• 90° conical Dispersion
• Optimal for compact 2-way Systems