EMINENCE EA12A ALPHA-12 12” 150 W 8 Ohm Μεγάφωνο

ALPHA-12A Series Standard American

Recommended for professional audio mid-bass applications in a small sealed or medium vented enclosure.

• Nominal Basket Diameter 12“, 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 150 W / Music Program 450 W
• Resonance 49 Hz
• Usable Frequency Range 51 Hz - 4.3 kHz
• Sensitivity 95.6
• Magnet Weight 20 oz.
• Gap Height 0.25“, 6.35 mm
• Voice Coil Diameter 1.5“, 38.1 mm

• Resonant Frequency (fs) 49 Hz
• DC Resistance (Re) 6.3
• Coil Inductance (Le) 0.79 mH
• Mechanical Q (Qms) 6.53
• Electromagnetic Q (Qes) 0.88
• Total Q (Qts) 0.77
• Compliance Equivalent Volume (Vas) 121.5 liters / 4.3 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 125 cc
• Mechanical Compliance of Suspension (Cms) 0.32 mm/N
• BL Product (BL) 8.5 T-M
• Diaphragm Mass inc. Airload (Mms) 33 grams
• Efficiency Bandwidth Product (EBP) 56
• Maximum Linear Excursion (Xmax) 2.4 mm
• Surface Area of Cone (Sd) 519.5 cm²
• Maximum Mechanical Limit (Xlim) 6.6 mm

• Recommended Enclosure Volume
  Sealed 17-22.7 liters / 0.6-0.8 cu. ft.
  Vented 56.6-113.3 liters / 2-4 cu. ft.
• Overall Diameter 12.26“, 311.4 mm
• Baffle Hole Diameter 11“, 279.5 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.25“, 6.4 mm
• Mounting Holes B.C.D. 11.71“, 297.5 mm
• Depth 4.73“, 120 mm

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

Specification
Nominal Diameter 320 (12) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 7.5 Ohm
Nominal Power Handling (2) 450 W
Continuous Power Handling (3) 900 W
Sensitivity (1W/1m) (4) 95 dB
Frequency Range 40 - 1000 Hz
Voice Coil Diameter 76 (3) mm (in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 22 (0.9) mm (in)
Magnetic Gap Depth 10.5 (0.4) mm (in)
Flux Density 1.15 T

Thiele & Small Parameters
Fs 42 Hz
Re 6.1 Ohm
Qes 0.22
Qms 3.8
Qts 0.2
Vas 75 (2.6) dm3 (ft3)
Sd 522 (80.9) cm2 (in2)
Eta Zero 2.4 %
Xmax +/- 7 mm
Xvar +/- 9 mm
Mms 74 g
Bl 23.5 Txm
Le 2 mH

Mounting and Shipping Info
Overall Diameter 316 mm (12.4 in)
Bolt Circle Diameter 296 mm (11.6 in)
Baffle Cutout Diameter 282 mm (11.1 in)
Depth 140 mm (5.5 in)
Flange and Gasket Thickness 16 mm (5/8 in)
Net Weight 7.6 kg (16.7 lb)
Shipping Weight 8.4 kg (18.5 lb)
Shipping Box 340x340x170 mm
(13.4x13.4x6.7 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.

This classic guitar speaker actually started life as a radio speaker that was modified specifically for use in electric guitar amplifiers. In its original incarnation as the G12 T530 it appeared in several colour variations, but it was the Blue version, fitted as standard into Vox AC30 amps, that secured its place in guitar tone history.

The Blue found favour with notable guitarists like Brian May, due to its glorious dampened attack, warm lows, mellow upper-mids and brilliant belllike top-end. When coupled with a suitable amplifier it evokes rich definition and develops beautiful musical compression when pushed. According to tone enthusiasts worldwide, the Blue is the benchmark for guitar speaker perfection.

BETA-12LTA Series Standard American

Recommended for professional audio as a woofer in small sealed monitor, or as a PA woofer or monitor in a
vented enclosure.

• Nominal Basket Diameter 12“, 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 225 W / Music Program 450 W
• Resonance 45 Hz
• Usable Frequency Range 48 Hz - 8 kHz
• Sensitivity 97.7
• Magnet Weight 38 oz.
• Gap Height 0.312“, 7.92 mm
• Voice Coil Diameter 2“, 50.8 mm

• Resonant Frequency (fs) 45 Hz
• DC Resistance (Re) 7.37
• Coil Inductance (Le) 0.83 mH
• Mechanical Q (Qms) 6.44
• Electromagnetic Q (Qes) 0.55
• Total Q (Qts) 0.51
• Compliance Equivalent Volume (Vas) 136.3 liters / 4.8 cu. ft.
• Peak Diaphragm Displacement Volume (Vd) 170 cc
• Mechanical Compliance of Suspension (Cms) 0.34 mm/N
• BL Product (BL) 11.7 T-M
• Diaphragm Mass inc. Airload (Mms) 36 grams
• Efficiency Bandwidth (EBP) Product 82
• Maximum Linear Excursion (Xmax) 3.2 mm
• Surface Area of Cone (Sd) 532.4 cm²
• Maximum Mechanical Limit (Xlim) 8.0 mm

• Recommended Enclosure Volume
  Sealed 14-51 liters/0.5-1.8 cu.ft.
  Vented 56.6-116 liters/2-4.1 cu.ft.
• Overall Diameter 12.03“, 305.5 mm
• Baffle Hole Diameter 10.95“, 278.1 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.25“, 6.4 mm
• Mounting Holes B.C.D. 11.59“, 294.3 mm
• Depth 4.47“, 114 mm

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

DELTA-12LFA American Standard Series

Recommended for professional audio mid-bass or floor monitor applications in a sealed enclosure. Also suitable
Mas a woofer in vented, bass guitar or PA enclosures.

• Nominal Basket Diameter 12“, 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 500 W / Music Program 1000 W
• Resonance 51 Hz
• Usable Frequency Range 44 Hz - 3 kHz
• Sensitivity 94.6
• Magnet Weight 56 oz.
• Gap Height 0.375“, 9.53 mm
• Voice Coil Diameter 2.5“, 63.5 mm

• Resonant Frequency (fs) 51 Hz
• DC Resistance (Re) 6.06
• Coil Inductance (Le) 1.45 mH
• Mechanical Q (Qms) 7.28
• Electromagnetic Q (Qes) 0.51
• Total Q (Qts) 0.47
• Compliance Equivalent Volume 67.9 liters (Vas) 67.9 liters / 2.4 cu. ft.
• Peak Diaphragm Displacement Volume 243 cc
• Mechanical Compliance of Suspension 0.19 mm/N
• BL Product (BL) 14.1 T-M
• Diaphragm Mass inc. Airload (Mms) 51 grams
• Efficiency Bandwidth Product (EBP) 100
• Maximum Linear Excursion (Xmax) 4.8 mm
• Surface Area of Cone (Sd) 506.7 cm²
• Maximum Mechanical Limit (Xlim) 13.5 mm

• Recommended Enclosure Volume
  Sealed 19.8-28 liters/0.7-1.0 cu.ft.
  Vented 25.5-102 liters/0.9-3.6 cu.ft.
• Overall Diameter 12.03“, 305.5 mm
• Baffle Hole Diameter 10.95“, 278.1 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.25“, 6.4 mm
• Mounting Holes B.C.D. 11.59“, 294.3 mm
• Depth 5.35“, 136 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

DELTA-12A Standard American

Recommended for professional audio as a mid-bass or woofer (with high-pass filter) in vented enclosures.

*Good replacement for Yamaha 12″ JAY51200 (1216301A), JAY51100, JAY5120, JAY5110 woofers.
Or Loudspeakers C112V, SM12V, BR12, BR12M, S112V, S112IV, SM121V, SV12, SV12M & more

SPECIFICATION

• Nominal Basket Diameter 12“, 304.8 mm
• Nominal Impedance 8 ohms
• Power Rating Watts 400 W / Music Program 800 W
• Resonance 55 Hz
• Usable Frequency Range 54 Hz - 5 kHz
• Sensitivity 98.3
• Magnet Weight 56 oz.
• Gap Height 0.375“, 9.53 mm
• Voice Coil Diameter 2.5“, 63.5 mm

THIELE & Small Parameters

• Resonant Frequency (fs) 55 Hz
• DC Resistance (Re) 6.3
• Coil Inductance (Le) 0.74 mH
• Mechanical Q (Qms) 5.27
• Electromagnetic Q (Qes) 0.46
• Total Q (Qts) 0.43
• Compliance Equivalent Volume 81.3 liters (Vas) 81.3 liters / 2.9 cu. ft.
• Peak Diaphragm Displacement Volume 125 cc
• Mechanical Compliance of Suspension 0.21 mm/N
• BL Product (BL) 13.5 T-M
• Diaphragm Mass inc. Airload (Mms) 39 grams
• Efficiency Bandwidth Product (EBP) 120
• Maximum Linear Excursion (Xmax) 2.4 mm
• Surface Area of Cone (Sd) 519.5 cm²
• Maximum Mechanical Limit (Xlim) 9.9 mm

MOUNTING Information

• Recommended Enclosure Volume
  Sealed N/A
  Vented 25.5-85 liters/0.9-3 cu.ft.
• Overall Diameter 12.03“, 305.5 mm
• Baffle Hole Diameter 10.95“, 278.1 mm
• Front Sealing Gasket fitted as standard
• Rear Sealing Gasket fitted as standard
• Mounting Holes Diameter 0.25“, 6.4 mm
• Mounting Holes B.C.D. 11.59“, 294.3 mm
• Depth 5.35“, 136 mm 

MATERIALS of Construction

• Aluminum voice coil
• Polyimide former
• Ferrite magnet
• Vented core
• Pressed steel basket
• Paper Cone
• Cloth cone edge
• Solid composition felt dust cap