SICA Z004931 8 M 1,5 CS 4Ω 200W MIDRANGE 8”

• 97.1 dB sensitivity
• όλα τα υπόλοιπα χαρακτηριστικά κατασκευής είναι ίδια με το Z004930

Woofer from JBL for control 28 speaker.

• JBL Control 28 Factory Speaker Woofer Part # 124-58001-00
• This is a complete brand new JBL, Control 28 woofer
• Voice coil: 1-1/2" (25mm)
• Diameter: 8-1/4" (210mm) 9-1/4" (235mm) diagonally
• Impedance: 8 ohm, DCR: 6 ohm
• Poly cone with rubber edge
• Fits JBL Driver and Cabinet Models:
  
  JBL: Control 28, Control 28T, Control 28T60, Control 28WH, 123-10002-00, 1231000200124-58001-00, 1245800100

• 93 dB sensitivity 1 W / 1 m
• 200 W + 80 W Power Handling
• 2" + 1.75" Sandwich Voice Coil
• Single Point Source providig coherent Wave Front
• 90° conical Dispersion
• Optimal for compact 2- or 3-way Systems

ALPHA- Serie 100W- 200W

Recommended for professional audio and bass guitar applications as a mid-range. Sealed basket makes this
woofer independent of enclosure design.

• Nominal Basket Diameter 8“, 203.2 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 125 W / Music Program 250 W
• Resonance 514 Hz
• Usable Frequency Range 400 Hz - 4.8 kHz
• Sensitivity 100.9
• Magnet Weight 20 oz.
• Gap Height 0.25“, 6.35 mm
• Voice Coil Diameter 1.5“, 38.1 mm

• Resonant Frequency (fs) 514 Hz
• DC Resistance (Re) 7.32
• Coil Inductance (Le) 0.34 mH
• Mechanical Q (Qms) 4.48
• Electromagnetic Q (Qes) 2.08
• Total Q (Qts) 1.42
• Compliance Equivalent Volume (Vas) 0.8 liters / 0.03 cu.ft.
• Peak Diaphragm Displacement Volume (Vd) 0cc
• Mechanical Compliance of Suspension (Cms) 0.01 mm/N
• BL Product (BL) 8.9 T-M
• Diaphragm Mass inc. Airload (Mms) 6.9 grams
• Efficiency Bandwidth Product(EBP) 247
• Maximum Linear Excursion (Xmax) 1.6 mm
• Surface Area of Cone (Sd) 205.9 cm²
• Maximum Mechanical Limit (Xlim) 3.0 mm

• Recommended Enclosure Volume
  Sealed N/A
  Vented N/A
• Overall Diameter 8.22“, 208.8 mm
• Baffle Hole Diameter 7.19“, 182.5 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.22“, 5.5 mm
• Mounting Holes B.C.D. 7.75“, 196.9 mm
• Depth 3.25“, 83 mm

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Pressed steel basket with closed back
• Paper Cone
• Paper cone edge
• Solid composition paper dust cap

Nominal Specifications

    * Nominal Diameter 8“, 200 mm
    * Overall Diameter 8.81/8.18“, 223.8/207.9 mm
    * Bolt Circle Diameter 8.27“, 210 mm
    * Baffle Cutout Diameter 7.24“, 184 mm
    * Depth 4.59“, 116.7 mm
    * Flange and Gasket Thickness 0.42“, 10.7 mm


Electrical Specifications

    * Minimum Impedance 6.5 Ohm
    * Nominal Impedance 8 Ohm
    * Nominal Power Handling*** 150 W
    * Maximum Power Handling**** 300 W
    * Sensitivity (1W/1m) 94 dB
    * Frequency Range 80 - 6300 Hz
    * Voice Coil Diameter 2“, 52 mm
    * Winding Material Aluminium
    * Former Material Glass Fiber
    * Winding Depth 0.53“, 13.5 mm
    * Magnetic Gap Depth 0.31“, 8 mm
    * Flux Density 1 T


THIELE & SMALL Parameters

    * Resonant Frequency (fs) 76 Hz
    * DC Resistance (Re) 5.8 Ohm
    * BL Product (BL) 9.86 N/A
    * Diaphragm Mass inc. Airload (Mms) 20.9 grams
    * Mechanical Compliance of Suspension (Cms) 0.2 mm/N
    * Rms 2.11 Kg/s
    * Electromagnetic Q (Qes) 0.59
    * Mechanical Q (Qms) 4.72
    * Total Q (Qts) 0.53
    * Compliance Equivalent Volume (Vas) 0.42 ft³, 11.9 dm³
    * Surface Area of Cone (Sd) 31“², 200 cm²
    * Maximum Linear Excursion (Xmax)* 5.42 mm
    * Xdamage** 12 mm
    * Coil Inductance (Le) 0.55 mH
    * Diaphragm mass (Mmd) 19.4 g
    * Eta Zero 0.85 %

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

• 96 dB Sensitivity 1 W / 1 m
• 200 W Power Handling
• 2" Aluminium Sandwich Voice Coil
• Double treated Cone for Water Protection
• Triple Aluminum demodulating Rings for ultra low Distortion
• Optimal for compact 2-way Systems