| Content | ALPHA-12A Series Standard American
Recommended for professional audio mid-bass applications in a small sealed or medium vented enclosure.
SPECIFICATION
- 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
THIELE & Small Parameters
- 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
MOUNTING Information
- 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
MATERIALS of Construction
- Copper voice coil
- Polyimide former
- Ferrite magnet
- Vented and extended core
- Pressed steel basket
- Paper Cone
- Cloth cone edge
- Solid composition felt dust cap
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Building on the platform of the Blue, the Gold is a higher-powered, Alnico-magnet speaker that recreates the unmistakable sonic signature of a ʽwell played-inʼ original. Over time, the high frequencies of a Blue soften and become less chalky as the cone becomes more flexible – a much sought after characteristic that the Gold exhibits straight out of the box. Also present in the Gold sound from the outset is an added warmth and complexity in the midrange which, coupled with the classic Alnico qualities of a laid-back attack, rounded low end and brilliant belllike highs, deliver huge rhythm voicings and saturated vocal lead tones.
The Gold is a wonderfully expressive and revealing loudspeaker, affording guitarists an unprecedented degree of dynamic control. It has already become a favourite for many working players worldwide whether picking and bending with Brad Paisley, or rocking hard with Danny Spitz of Anthrax.
| General specifications |
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| Nominal diameter | 12“, 305mm | | Power Rating | 50W | | Nominal impedance | 8Ω and 15Ω | | Sensitivity | 100dB | | Chassis type | Pressed steel | | Voice coil diameter | 1.75“, 44.5mm | | Voice coil material | Round copper | | Magnet type | Alnico | | Frequency range | 75-5000Hz | | Resonance frequency, Fs | 75Hz | | DC resistance, Re | 6.4Ω & 11.8Ω | | Mounting Information | | Diameter | 12.2“, 309mm | | Overall depth | 6.5“, 165mm | | Magnet structure diameter | 5.0“, 128mm | | Cut-out diameter | 11.1“, 283mm | | Mounting slot dimensions | 0.31“, 7.9mm Ø | | Number of mounting slots | 4 | | Mounting slot PCD | 11.7“, 297mm | | Unit weight | 9.3lb, 4.2kg |
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| 1400 W continuous program power capacity |
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| 100 mm (4 in) copper voice coil |
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| 45 – 1000 Hz response |
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| 93 dB sensitivity |
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| Double silicone spider with optimized compliance |
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- Neodymium Coaxial Transducer
- 98 dB Sensitivity 1 W / 1 m
- 500 W + 80 W Power Handling
- 3" Copper Sandwich Voice Coil
- Triple Aluminum demodulating Rings
- Elliptical 80° x 60° Waveguide for precise directivity
- Single Point Source providing coherent Wave Front
- Very high SPL, superb Quaity Sound
- Optimal for compact 2-way Systems
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For use in 2-way or compact 3-way systems, the 1225 bass and mid range driver has a high sensitivity and excellent power handling characteristics.
General specifications | Nominal diameter (mm/in) | 305/12 | | Power Rating (AES, W rms) | 250 | | Nominal impedance (Ω) | 8 | | Voice coil diameter (mm/in) | 63.5/2.5 | | Magnet type | Ceramic | | Magnet weight (kg/oz) | 1.2/42 | | Chassis type | Pressed steel | | Sensitivity (dB) | 97 | | Frequency range (Hz) | 40-4000 | | Coil material | Round copper | | Former material | Polyimide | | Cone material | Kevlar loaded paper | | Surround material | Cloth-sealed | | Suspension | Single | | Xmax (mm/in) | 2.4/0.09 | | Gap depth (mm/in) | 8.0/0.31 | | Voice coil winding width (mm/in) | 12.7/0.50 | Small Signal Parameters | D (m/in) | 0.26/10.24 | | Fs (Hz) | 63 | | Mmd (g/oz) | 39.60/1.40 | | Mair | | | Qms | 6.70 | | Qes | 0.54 | | Qts | 0.50 | | Re (Ω) | 5.13 | | Vas (lt/ft3) | 54.5/1.92 | | BI (Tm) | 13.20 | | Cms (mm/N) | 0.14 | | Rms (kg/s) | 2.76 | | Le (mH) | | Mounting Information | Overall diameter (mm/in) | 309/12.17 | | Overall depth (mm/in) | 130/5.12 | | Cut-out diameter (mm/in) | 283/11.14 | | Mounting slot dimensions (mm/in) | Ø 7.9/0.31 | | Number of mounting slots | 4 | | Mounting slot PCD range (mm/in) | 297/11.69 | | Unit weight (kg/lb) | 4.1/9.0 | Packed Dimensions and Weight | Single pack size W x D x H (mm/in) | 330 x 330 x 150/13.0 x 13.0 x 5.9 | | Single pack weight (kg/lb) | 3/6.6 | | Multipack (60) size W x D x H (mm/in) | 1080 x 980 x 880/42.5 x 38.6 x 34.6 | | Multipack (60) weight (kg/lb) | 190/419 |
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| 700 W continuous program power capacity |
| | 80° nominal coverage |
| | 45 – 18000 Hz response |
| | 99 dB sensitivity |
| | Single Neodymium magnet assembly |
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