MASTER AUDIO MA16BT/4 FERRITE 165 mm (6,5″) woofer 150W 4ohm

• Fiberglass cone - rubber edge
• Output power: 150 watt
• Impedance: 4 Ohm
• Sensitivity: 91 dB
• Frequency response: 60-6000 Hz
• Magnet weight: 20 oz
• Voice coil diameter: 30 mm.

ALPHA- Serie 100W- 200W

Recommended for professional audio mid-range applications in a sealed cabinet, or as a mid-bass in a vented
satellite enclosure.

• Nominal Basket Diameter 6.5“, 165 mm
• Nominal Impedance 4 ohms
• Power Rating Watts 100 W / Music Program 200 W
• Resonance 118 Hz
• Usable Frequency Range 85 Hz - 6 kHz
• Sensitivity 93.6
• Magnet Weight 20 oz.
• Gap Height 0.25“, 6.35 mm
• Voice Coil Diameter 1.5“, 38.1 mm

• Resonant Frequency (fs) 118 Hz
• DC Resistance (Re) 7.2
• Coil Inductance (Le) 0.19 mH
• Mechanical Q (Qms) 5.68
• Electromagnetic Q (Qes) 0.60
• Total Q (Qts) 0.54
• Compliance Equivalent Volume (Vas) 5.8 liters / 0.2 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 44cc
• Mechanical Compliance of Suspension (Cms) 0.26 mm/N
• BL Product (BL) 8.0 T-M
• Diaphragm Mass inc. Airload (Mms) 7 grams
• Efficiency Bandwidth Product (EBP) 197 Maximum Linear Excursion (Xmax) 3.5 mm
• Surface Area of Cone (Sd) 126.7 cm²
• Maximum Mechanical Limit (Xlim) 4.0 mm

• Recommended Enclosure Volume
  Sealed 2.8-5.7 liters / 0.1-0.2 cu. ft.
  Vented 3.4-15.6 liters / 0.12-0.55 cu. ft.
• Overall Diameter 6.59“, 167.4 mm
• Baffle Hole Diameter 5.69“, 144.5 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. 6.06“, 154 mm
• Depth 2.8“, 71 mm

• Copper voice coil
• Polyimide former
• Ferrite magnet
• Vented and extended core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition paper dust cap

Nominal Diameter     160 mm (6 in)
Overall Diameter     167.4 mm (6.59 in)
Bolt Circle Diameter     154 mm (6.06 in)
Baffle Cutout Diameter     144 mm (5.67 in)
Depth     77 mm (3 in)
Flange and Gasket Thickness     8 mm (0.31 in)
Net Weight     2 Kg (4.41 lb)
Shipping Box
(Single Carton Box)     103x190x185 mm (4.06x7.48x7.28 in)
Shipping Weight     2.6 Kg (5.73 lb)
       

Nominal Impedance     8 Ohm
Minimum Impedance     6.8 Ohm
Nominal Power Handling ***     130 W
Maximum Power Handling ****     260 W
Sensitivity (1W/1m)     95 dB
Frequency Range     85÷6000 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     120 Hz
Re     5.9 Ohm
Qes     0.5
Qms     7.3
Qts     0.47
Vas     3.56 dm^3 (0.13 ft^3)
Sd     118 cm^2 (18.29 in^2)
Xmax *     4.67 mm
Xdamage **     10.4 mm
Mms     11 g
Bl     8.2 N/A
Le     0.4 mH
Mmd     9.5 g
Cms     0.18 mm/N
Rms     1 Kg/s
Eta Zero     1 %
EBP     240 Hz

• 93 dB Sensitivity 1 W / 1 m
• 130 W Power Handling
• 1.5" Sandwich Voice Coil
• Double treated Cone for Water Protection
• Neodymium Magnet System
• Twin Aluminum demodulating Rings for ultra low Distortion
• Optimal for compact 2- or 3-way Systems

Nominal Diameter     160 mm (6 in)
Overall Diameter     181.2/164 mm (7.13/6.46 in)
Bolt Circle Diameter     167 mm (6.57 in)
Baffle Cutout Diameter     147 mm (5.79 in)
Depth     84.5 mm (3.33 in)
Flange and Gasket Thickness     8 mm (0.31 in)
Net Weight     1.2 Kg (2.64 lb)
Shipping Box
(Single Carton Box - 4 units)     380x393x128 mm (14.9x15.47x5.03 in)
Shipping Weight (4 units)     5.6 Kg (13.82 lb)

Nominal Impedance     8 Ohm
Minimum Impedance     5.9 Ohm
Nominal Power Handling ***     100 W
Maximum Power Handling ****     200 W
Sensitivity (1W/1m)     91 dB
Frequency Range     63÷5000 Hz
Voice Coil Diameter     32 mm (1.26 in)
Winding Material     Cu
Former Material     Kapton
Winding Depth     12.5 mm (0.49 in)
Magnetic Gap Depth     6 mm (0.24 in)
Flux Density     1 T

Fs     61 Hz
Re     5.4 Ohm
Qes     0.6
Qms     6
Qts     0.54
Vas     14.8 dm^3 (0.52 ft^3)
Sd     137 cm^2 (21.23 in^2)
Xmax *     5.25 mm
Xdamage **     13.15 mm
Mms     14 g
Bl     6.8 N/A
Le     0.5 mH
Mmd     13 g
Cms     0.56 mm/N
Rms     0.84 Kg/s
Eta Zero     0.46 %
EBP     102 Hz

Woofer 6" 300w program/94dB/W/m-70-
5000Hz.

300 W continuous program power capacity
38 mm (1.5 in) aluminium voice coil
70 - 5000 Hz response
94 dB sensitivity

Specification
Nominal Diameter 170 (6.5) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 6.6 Ohm
Nominal Power Handling (2) 150 W
Continuous Power Handling (3) 300 W
Sensitivity (1W/1m) (4) 94 dB
Frequency Range 70 - 5000 Hz
Voice Coil Diameter 38 (1.5) mm (in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 12.5 (1/2) mm (in)
Magnetic Gap Depth 6 (0.25) mm (in)
Flux Density 1.4 T

Thiele & Small Parameters
Fs 75 Hz
Re 5.4 Ohm
Qes 0.31
Qms 11.7
Qts 0.3
Vas 8 (0.28) dm3 (ft3)
Sd 132 (20.5) cm2 (in2)
Eta Zero 1 %
Xmax +/- 6 mm
Xvar +/- 7.5 mm
Mms 14 g
Bl 10.8 Txm
Le 0.6 mH

Mounting and Shipping Info
Overall Diameter 187 mm (7.4 in)
Bolt Circle Diameter 172 mm (6.7 in)
Baffle Cutout Diameter 145 mm (5.7 in)
Depth 82 mm (3.2 in)
Flange and Gasket Thickness 9 mm (0.35 in)
Net Weight 2.2 kg (4.8 lb)
Shipping Weight (4 units) 10.1 kg (22.2 lb)
Shipping Box (4 units) 405x225x210 mm
(15.9x8.8x8.3 in)
1For different impedances, please ask.
22 hours test made with continuous pink noise signal (6 dB crest factor).
Power calculated on rated minimum impedance.
3Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.
4Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance.