Specification Nominal Basket Diameter Nominal Impedance* Power Rating** Watts Music Program Resonance Usable Frequency Range*** Sensitivity Magnet Weight Gap Height Voice Coil Diameter Thiele & Small Parameters Resonant Frequency (fs) DC Resistance (Re) Coil Inductance (Le) Mechanical Q (Qms) Electromagnetic Q (Qes) Total Q (Qts) Compliance Equivalent Volume (Vas) Peak Diaphragm Displacement Volume (Vd) Mechanical Compliance of Suspension (Cms) BL Product (BL) Diaphragm Mass inc. Airload (Mms) Efficiency Bandwidth Product (EBP) Maximum Linear Excursion (Xmax) Surface Area of Cone (Sd) Maximum Mechanical Limit (Xlim) Mounting Information 1, 254mm 8 ohms 25W 5W 53Hz 51Hz-3.8kHz 97 34 oz.3, 7.92mm 2, 5.8mm 53Hz 5.75.7mH 8.14.52.49.1 ltr/2.1 cu. ft. cc.3mm/n 9. T-M 25 grams 13 3.mm 344.9cm 2 8.mm BETA-1A American Standard Series The Art and Science of Sound Recommended for professional audio, bass guitar, mid-bass or floor monitor applications in sealed enclosures. Also works well as a mid-bass or woofer in vented enclosures. Recommended Enclosure Volume Sealed Vented Overall Diameter Baffle Hole Diameter Front Sealing Gasket Rear Sealing Gasket Mounting Holes Diameter Mounting Holes B.C.D. Depth Net Weight Shipping Weight 8.5-14.2 ltr/.3-.5 cu. ft. 19.8-7.8 ltr/.7-2.5 cu. ft. 1.11, 25.8mm 9.13, 231.8mm Fitted as Standard Fitted as Standard.23, 5.7mm 9., 243.8mm 3.98, 11mm.8 lbs, 3.1 kg 7.8 lbs, 3. kg Materials of Construction Coil Construction Coil Magnet Composition Core Details Basket Materials Cone Composition Cone Edge Composition Dust Cap Composition Aluminum Polyimide Ferrite Vented Pressed Steel Paper Cloth Solid Composition Paper * Please inquire about alternative impedances. ** Multiple units exceed published rating evaluated under EIA 42A noise source and test standard while in a free-air, nontemperature-controlled environment. *** The average output across the usable frequency range when applying 1W/1m into the nominal impedance. Ie: 2.83 V/8 ohms, 4 V/1 ohms. Eminence response curves are measured under the following conditions: All speakers are tested at 1W/1m using a variety of test set-ups for the appropriate impedance LMS using.25 supplied microphone (software calibrated) mounted 1m from wall/baffle 2 ft. X 2 ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction Hafler P15 Trans-Nova amplifier 27 cu.ft. chamber with fiberglass on all six surfaces (three with custom-made wedges)
Beta1A Med Vented Cab, Bass Guitar/ Low Pwr FR By Jerry McNutt, Eminence Speaker LLC Displacement limited to 5 Watts; F3 51 Hz. Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square (optimum) --Box Parameters-- Vb = 2.1 cu.ft V(total) = 2.1 cu.ft Fb = 55 Hz QL = 7 F3 = 59.9 Hz Fill = minimal --Vents-- No. of Vents = 2 Vent shape = round Vent ends = one flush Dv = 3 in Lv = 2.7 in Driver Properties --Description-- Name: Beta-1 (8 ohm) Type: Standard one-way driver Company: Eminence Speaker LLC Comment: Revised Sep-22 Piston: Paper cone. Suspension: Cloth surround. Dust Cap: Solid composition paper dust cap. Frame: Pressed steel basket. Voice Coil: 2 inch (5.8 mm) AL Wire. Kapton former. Magnet: 34 oz ferrite magnet. --Configuration-- No. of Drivers = 1 --Mechanical Parameters-- Fs = 53 Hz Qms = 8.14 Vas =.1 liters Cms =.3 mm/n Mms = 25 g Rms = 1.3 kg/s Xmax = 3 mm Xmech = 8.4 mm P-Dia = 28.9 mm Sd = 344.9 sq.cm P-Vd =.14 liters --Electrical Parameters-- Qes =.52 Re = 5.75 ohms Le =.7 mh Z = 8 ohms BL = 9. Tm Pe = 25 watts --Electromech. Parameters-- Qts =.49 no = 1.59 % 1-W SPL = 94.35 2.83-V SPL = 95.78 File: Beta1MedVentedCabinet5Watts.bb
Page Two -- Beta1MedVentedCabinet5Watts.bb Normalized Amplitude Response (-SPL/Hz) - - -18-24 -3-3 Custom Amplitude Response (-SPL/Hz at 1 m) with 5 watts 119 113 17 11 95 89 83 77 Maximum Acoustic Power (-SPL/Hz at 1 m) 4 118 1 1 1 94 88 82
Page Three -- Beta1MedVentedCabinet5Watts.bb Maximum Electric Input Power (W/Hz) watts 2 1 2 1 2 Cone Displacement (mm/hz) with 5 watts mm 1 14 1 8 4 2 Vent Air Velocity (m/sec/hz) with 5 watts m/s 48 42 3 3 24 18
Page Four -- Beta1MedVentedCabinet5Watts.bb System Impedance (ohms/hz) ohms 8 7 5 4 3 2 1 Phase Response (deg/hz) deg 9-9 ±18 9-9 ±18 msec 24 Group Delay (msec/hz) 2 1 8 4-4 -8
Beta1A Sm Vented Mid/High or Low Pwr Public Address By Jerry McNutt, Eminence Speaker LLC High Power Mid/High Cabinet: 25 Watt THermal limit; use above 2 Hz. Public Address (Semi-Full Range): 1 Watt Displacement Limit; use above 8 Hz Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square (optimum) --Box Parameters-- Vb =.7 cu.ft V(total) =.757 cu.ft Fb = 5.39 Hz QL = 7 F3 = 82.55 Hz Fill = minimal --Vents-- No. of Vents = 1 Vent shape = round Vent ends = one flush Dv = 3 in Lv = 3.2 in Driver Properties --Description-- Name: Beta-1 (8 ohm) Type: Standard one-way driver Company: Eminence Speaker LLC Comment: Revised Sep-22 Piston: Paper cone. Suspension: Cloth surround. Dust Cap: Solid composition paper dust cap. Frame: Pressed steel basket. Voice Coil: 2 inch (5.8 mm) AL Wire. Kapton former. Magnet: 34 oz ferrite magnet. --Configuration-- No. of Drivers = 1 --Mechanical Parameters-- Fs = 53 Hz Qms = 8.14 Vas =.1 liters Cms =.3 mm/n Mms = 25 g Rms = 1.3 kg/s Xmax = 3 mm Xmech = 8.4 mm P-Dia = 28.9 mm Sd = 344.9 sq.cm P-Vd =.14 liters --Electrical Parameters-- Qes =.52 Re = 5.75 ohms Le =.7 mh Z = 8 ohms BL = 9. Tm Pe = 25 watts --Electromech. Parameters-- Qts =.49 no = 1.59 % 1-W SPL = 94.35 2.83-V SPL = 95.78 File: Beta1ASmallVented25Watts.bb
Page Two -- Beta1ASmallVented25Watts.bb Normalized Amplitude Response (-SPL/Hz) - - -18-24 -3-3 Custom Amplitude Response (-SPL/Hz at 1 m) with 25 watts 114 18 9 9 84 Maximum Acoustic Power (-SPL/Hz at 1 m) 4 118 1 1 1 94 88 82
Page Three -- Beta1ASmallVented25Watts.bb Maximum Electric Input Power (W/Hz) watts 2 1 2 1 2 Cone Displacement (mm/hz) with 25 watts mm 1 14 1 8 4 2 Vent Air Velocity (m/sec/hz) with 25 watts m/s 48 42 3 3 24 18
Page Four -- Beta1ASmallVented25Watts.bb System Impedance (ohms/hz) ohms 8 7 5 4 3 2 1 Phase Response (deg/hz) deg 9-9 ±18 9-9 ±18 msec 24 Group Delay (msec/hz) 2 1 8 4-4 -8
Beta1A Sealed Mid/High or Floor Monitor Box By Jerry McNutt, Eminence Speaker LLC Displacement Limited to 15 Watts; use above 5 Hz. Box Properties --Description-- Name: Type: Closed Box Shape: Prism, square --Box Parameters-- Vb =.295 cu.ft V(total) =.334 cu.ft Qtc =.979 QL = 2 F3 = 113.3 Hz Fill = heavy Normalized Amplitude Response (-SPL/Hz) - - -18-24 -3-3 Driver Properties --Description-- Name: Beta-1 (8 ohm) Type: Standard one-way driver Custom Amplitude Response (-SPL/Hz at 1 m) with 15 watts Company: Eminence Speaker LLC Comment: Revised Sep-22 Piston: Paper cone. Suspension: Cloth surround. 4 118 Dust Cap: Solid composition paper dust cap. 1 Frame: Pressed steel basket. Voice Coil: 2 inch (5.8 mm) AL Wire. Kapton 1 former. Magnet: 34 oz ferrite magnet. --Configuration-- No. of Drivers = 1 --Mechanical Parameters-- 1 94 88 Fs = 53 Hz 82 Qms = 8.14 Vas =.1 liters Cms =.3 mm/n Mms = 25 g Maximum Acoustic Power (-SPL/Hz at 1 m) Rms = 1.3 kg/s Xmax = 3 mm Xmech = 8.4 mm 4 P-Dia = 28.9 mm 118 Sd = 344.9 sq.cm 1 P-Vd =.14 liters --Electrical Parameters-- 1 Qes =.52 1 Re = 5.75 ohms 94 Le =.7 mh 88 Z = 8 ohms 82 BL = 9. Tm Pe = 25 watts --Electromech. Parameters-- Qts =.49 no = 1.59 % 1-W SPL = 94.35 2.83-V SPL = 95.78 File: Beta1ASealed15Watts.bb
Page Two -- Beta1ASealed15Watts.bb Maximum Electric Input Power (W/Hz) watts 2 1 2 1 2 Cone Displacement (mm/hz) with 15 watts mm 1 14 1 8 4 2 System Impedance (ohms/hz) ohms 8 7 5 4 3 2 1
Page Three -- Beta1ASealed15Watts.bb Phase Response (deg/hz) deg 9-9 ±18 9-9 ±18 msec 24 Group Delay (msec/hz) 2 1 8 4-4 -8