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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.
SPECIFICATION - 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
THIELE & Small Parameters - 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
MOUNTING Information - 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
MATERIALS of Construction - Copper voice coil
- Polyimide former
- Ferrite magnet
- Pressed steel basket with closed back
- Paper Cone
- Paper cone edge
- Solid composition paper dust cap
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- 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
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Nominal Specifications
* Nominal Diameter 8“, 200 mm
* Overall Diameter 8.81/8.18“, 223.8/203.9 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 6.4 Ohm
* Nominal Impedance 8 Ohm
* Nominal Power Handling*** 200 W
* Maximum Power Handling**** 400 W
* Sensitivity (1W/1m) 95 dB
* Frequency Range 60 - 5000 Hz
* Voice Coil Diameter 2“, 52 mm
* Winding Material Aluminium
* Former Material Glass Fiber
* Winding Depth 0.76“, 19.3 mm
* Magnetic Gap Depth 0.35“, 9 mm
* Flux Density 1.15 T
THIELE & SMALL Parameters
* Resonant Frequency (fs) 58 Hz
* DC Resistance (Re) 5.1 Ohm
* BL Product (BL) 11.3 N/A
* Diaphragm Mass inc. Airload (Mms) 24 grams
* Mechanical Compliance of Suspension (Cms) 0.31 mm/N
* Rms 0.93 Kg/s
* Electromagnetic Q (Qes) 0.34
* Mechanical Q (Qms) 9.4
* Total Q (Qts) 0.35
* Compliance Equivalent Volume (Vas) 0.62 ft³, 17.6 dm³
* Surface Area of Cone (Sd) 30.8“², 199 cm²
* Maximum Linear Excursion (Xmax)* 8.15 mm
* Xdamage** 13.5 mm
* Coil Inductance (Le) 0.55 mH
* Diaphragm mass (Mmd) 22 g
* Eta Zero 1.02 %
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
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Nominal Specifications - Nominal Diameter 8“, 200 mm
- Overall Diameter 8.81/8.18“, 223.7/207.9 mm
- Bolt Circle Diameter 8.27“, 210 mm
- Baffle Cutout Diameter 7.20“, 183 mm
- Depth 3.88“, 98.5 mm
- Flange and Gasket Thickness 0.43“, 10.8 mm
Electrical Specifications - Minimum Impedance 6.4 Ohm
- Nominal Impedance 8 Ohm
- Nominal Power Handling*** 200 W
- Maximum Power Handling**** 400 W
- Sensitivity (1W/1m) 97 dB
- Frequency Range 80 - 6300 Hz
- Voice Coil Diameter 2“, 52 mm
- Winding Material Aluminium
- Former Material Glass Fiber
- Winding Depth 0.39“, 9.8 mm
- Magnetic Gap Depth 0.31“, 8 mm
- Flux Density 1.3 T
THIELE & SMALL Parameters - Resonant Frequency (fs) 90 Hz
- DC Resistance (Re) 5.3 Ohm
- BL Product (BL) 13 N/A
- Diaphragm Mass inc. Airload (Mms) 23 grams
- Mechanical Compliance of Suspension (Cms) 0.14 mm/N
- Rms 1.53 Kg/s
- Electromagnetic Q (Qes) 0.41
- Mechanical Q (Qms) 8.5
- Total Q (Qts) 0.39
- Compliance Equivalent Volume (Vas) 0.29 ft³, 8.26 dm³
- Surface Area of Cone (Sd) 32.09“², 207 cm²
- Maximum Linear Excursion (Xmax)* 3.57 mm
- Xdamage** 10.65 mm
- Coil Inductance (Le) 0.41 mH
- Diaphragm mass (Mmd) 21.2 g
- Eta Zero 1.44 %
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
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- 2'' voice coil Kapton former
- Ventilated magnet and voice coil to reduce power compression
- 94.6 dB sensitivity
Manual/Εγχειρίδιο
| The B&C Speakers 8NDL51-16 is an efficient and lightweight cast frame 8" neodymium driver. Its ventilated voice coil gap ensures long term power handling and reduced power compression, and a copper cap on the pole piece reduces inductance and extends high frequency response. The 8NDL51-16 is highly recommended for compact 2-way speaker systems or as the midbass/midrange element in high-output 3-way and 4-way designs.
- Great for line arrays and horn loading
- Neodymium magnet assembly
- Ventilated voice coil gap for reduced power compression
- Inductance-reducing copper cap on pole piece extends HF response
- 2" copper voice coil on polyimide former
- 400 watts continuous program power capacity
- 65 - 3,000 Hz response
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