Barrios

Alpha12A Large Vented FR or Bass Guitar Cab
By Jerry McNutt, Eminence Speaker LLC 50 Watts Displacement Limit; F3 of 51 Hz. Box Properties
--Description-Name: Type: Vented Box Shape: Prism, square (optimum) --Box Parameters-Vb = 3.8 cu.ft V(total) = 3.883 cu.ft Fb = 62.88 Hz QL = 7 F3 = 50.77 Hz Fill = minimal --Vents-No. of Vents = 1 Vent shape = round Vent ends = one flush Dv = 7.508 in Lv =0.75 in
Normalized Amplitude Response (dB-SPL/Hz)
dB 6 0 -6 -12 -18 -24 -30 -36 5 Hz 10 50 100 500 1K 5K 10 K 20 K Eminence Designer

Driver Properties
--Description-Name: Alpha-12 Type: Standard one-way driver Company: Eminence Speaker LLC Comment: Revised OCT 2005 Piston: Paper cone. Suspension: Cloth surround. Dust Cap: Solid paper dust cap. Frame: Pressed steel basket. Voice Coil: 1.5inch (38.1 mm) copper. Magnet: 20 oz ferrite magnet. --Configuration-No. of Drivers = 1 --Driver Parameters-Fs = 49 Hz Qms = 6.53 Vas = 121.5 liters Xmax = 2.4 mm Sd = 519.5 sq.cm Qes = 0.88 Re = 6.3 ohms Le = 0.79 mH Z= 8 ohms Pe = 150 watts

Custom Amplitude Response (dB-SPL/Hz at 1 m) with 50 watts
dB 118 112 106 100 94 88 82 76 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 KMaximum Acoustic Power (dB-SPL/Hz at 1 m)
dB 122 116 110 104 98 92 86 80 5 Hz 10 50 100 500 1K

Eminence Designer

5K

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20 K

File: Alpha12ALargeVentedBassGuitarCab.bb6

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Cone Displacement (mm/Hz) with 50 watts
mm 16 14 12 10 8 6 4 2 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

Vent Air Velocity(m/sec/Hz) with 50 watts
m/s 48 42 36 30 24 18 12 6 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

System Impedance (ohms/Hz)
ohms 80 70 60 50 40 30 20 10 5 Hz 10 50 100 500 1K

Eminence Designer

5K

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Alpha12A Med Vented, High Pwr Sat or Low Pwr FR Use
By Jerry McNutt, Eminence Speaker LLC High Power Sat: 150 Watt Thermal Limit, use steep High Pass Filter150 Hz or above. Low Power Full Range use: 60 Watts Displacement Limit. Box Properties
--Description-Name: Type: Vented Box Shape: Prism, square (optimum) --Box Parameters-Vb = 2 cu.ft V(total) = 2.075 cu.ft Fb = 75 Hz QL = 7 F3 = 66.36 Hz Fill = minimal --Vents-No. of Vents = 1 Vent shape = round Vent ends = one flush Dv = 5.774 in Lv = 0.75 in
Normalized Amplitude Response (dB-SPL/Hz)
dB 6 0 -6-12 -18 -24 -30 -36 5 Hz 10 50 100 500 1K 5K 10 K 20 K Eminence Designer

Driver Properties
--Description-Name: Alpha-12 Type: Standard one-way driver Company: Eminence Speaker LLC Comment: Revised OCT 2005 Piston: Paper cone. Suspension: Cloth surround. Dust Cap: Solid paper dust cap. Frame: Pressed steel basket. Voice Coil: 1.5 inch (38.1 mm) copper. Magnet: 20 oz ferrite magnet.--Configuration-No. of Drivers = 1 --Driver Parameters-Fs = 49 Hz Qms = 6.53 Vas = 121.5 liters Xmax = 2.4 mm Sd = 519.5 sq.cm Qes = 0.88 Re = 6.3 ohms Le = 0.79 mH Z= 8 ohms Pe = 150 watts

Custom Amplitude Response (dB-SPL/Hz at 1 m) with 150 watts
dB 123 117 111 105 99 93 87 81 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

Maximum Acoustic Power (dB-SPL/Hz at 1 m)
dB 122 116 110104 98 92 86 80 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

File: Alpha12AMedVentedEnclosure.bb6

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Cone Displacement (mm/Hz) with 150 watts
mm 16 14 12 10 8 6 4 2 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

Vent Air Velocity (m/sec/Hz) with 150 watts
m/s 48 42 36 30 24 18 12 6 5 Hz 10 50 100 500 1KEminence Designer

5K

10 K

20 K

System Impedance (ohms/Hz)
ohms 80 70 60 50 40 30 20 10 5 Hz 10 50 100 500 1K

Eminence Designer

5K

10 K

20 K

Alpha12A Small Sealed Mid/High or Floor Monitor
By Jerry McNutt, Eminence Speaker LLC 150 Watt Thermal Limit; Use with a steep High Pass Filter set to 150 Hz or higher. Box Properties
--Description-Name: Type: Closed Box...