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12" Neodymium Ultra low Distortion low Midrange Driver
Features
- 98 dB Sensitivity 1 W / 1 m
- 1000 W Power Handling
- 4" Copper Sandwich Voice Coil for low Power Compression
- Double treated Cone for Water Protection
- Neodymium Magnet System
- Triple Aluminum demodulating Rings for ultra low Distortion
- Optimal for compact 2- or 3-way Systems
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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. | BETA- 12A Series Standard American
Recommended for professional audio and bass guitar applications as a woofer in a vented enclosure. Also
works well for PA in a sealed or bandpass enclosure.
SPECIFICATION
- Nominal Basket Diameter 12", 304.8 mm
- Nominal Impedance 8 ohms
- Power Rating Watts 250 W / Music Program 500 W
- Resonance 47 Hz
- Usable Frequency Range 43 Hz - 3.8 kHz
- Sensitivity 98
- Magnet Weight 38 oz.
- Gap Height 0.312", 7.92 mm
- Voice Coil Diameter 2", 50.8 mm
THIELE & Small Parameters
- Resonant Frequency (fs) 47 Hz
- DC Resistance (Re) 5.0
- Coil Inductance (Le) 0.64 mH
- Mechanical Q (Qms) 6.00
- Electromagnetic Q (Qes) 0.50
- Total Q (Qts) 0.46
- Compliance Equivalent Volume (Vas) 120.1 liters / 4.2 cu. ft.
- Peak Diaphragm Displacement Volume (Vd) 237 cc
- Mechanical Compliance of Suspension (Cms) 0.29 mm/N
- BL Product (BL) 10.8 T-M
- Diaphragm Mass inc. Airload (Mms) 40 grams
- Efficiency Bandwidth Product (EBP) 94
- Maximum Linear Excursion (Xmax) 4.4 mm
- Surface Area of Cone (Sd) 538.9 cm²
- Maximum Mechanical Limit (Xlim) 11 mm
MOUNTING Information
- Recommended Enclosure Volume
Sealed 25.5-35.4 liters, 0.9-1.25 cu.ft.
Vented 36.8-139 liters/1.3-4.9 cu.ft.
- Overall Diameter 12.03", 305.5 mm
- Baffle Hole Diameter 10.95", 278.1 mm
- Front Sealing Gasket standard fitted as standard
- Rear Sealing Gasket standard fitted as standard
- Mounting Holes Diameter 0.25", 6.4 mm
- Mounting Holes B.C.D. 11.59", 294.3 mm
- Depth 4.57", 116 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 paper dust cap
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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.
| General specifications |
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| Nominal diameter | 12“, 305mm | | Power Rating | 15W | | 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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| 2000 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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| 95 dB sensitivity |
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| Aluminium demodulating ring allows a very low distortion figure |
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| Double silicone spider with optimized compliance |
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| Ventilated voice coil gap for reduced power compression |
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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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