| Content | General
Product type
Loudspeaker Chassis
Overall diameter
314.45 mm
Pitch Circle Diameter
295.15 mm
Cut- out Measurement
280.92 mm
Diameter of fixing holes
6.5 mm
Nominal Impedance
8 Ohm(s)
Nominal Load Capacity
400 W
Sensitivity (1 W / 1 m)
95.4 dB
Frequency response
40 - 3200 Hz
Voice Coil Material
copper
Depth of the magnetic gap
9.27 mm
Thiele & Small Parameter
Fs (Resonance Frequency)
42 Hz
Re (DC resistance)
5.7 Ohm(s)
Qms (mechanical quality)
8.37
Le (inductance of the voice coil)
0.61 mH
Qes (electrical quality)
0.31
Qts (overall quality)
0.3
Vas (equivalent volume)
111.5
BL (power factor)
16.02 T/m
Xmax (maximum displacement)
7.47 mm
Cms (elasticity of the suspension)
0.27 mm/N
Sd (membrane area)
545.4 cm²
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| 700 W continuous program power capacity |
|
| 80° nominal coverage |
|
| 55 – 20000 Hz response |
|
| 99 dB sensitivity |
|
| XO-3 dedicated crossover network |
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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 |
|---|
| 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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KAPPA PRO-12A Professional SeriesRecommended for professional audio in a vented mid-bass, and vented bass enclosure incorporating a high-pass filter.
Product type
Loudspeaker Chassis
Nominal Diameter
304.8 mm
Overall diameter
314.5 mm
Pitch Circle Diameter
293.8 mm
Cut- out Measurement
281.1 mm
Diameter of fixing holes
6.5 mm
Nominal Impedance
8 Ohm(s)
Nominal Load Capacity
500 W
maximum rated load
1000 W
Sensitivity (1 W / 1 m)
97.1 dB
Frequency response
57 - 2800 Hz
Voice Coil Material
copper
Depth of the magnetic gap
9.53 mm
Fs (Resonance Frequency)
37 Hz
Re (DC resistance)
5.46 Ohm(s)
Qms (mechanical quality)
6.93
Le (inductance of the voice coil)
1.22 mH
Qes (electrical quality)
0.25
Qts (overall quality)
0.24
Vas (equivalent volume)
121
BL (power factor)
17.3 T/m
Xmax (maximum displacement)
4.8 mm
Cms (elasticity of the suspension)
0.32 mm/N
Sd (membrane area)
519.5 cm²
|
| 700 W continuous program power capacity |
| | 80° nominal coverage |
| | 45 – 18000 Hz response |
| | 99 dB sensitivity |
| | Single Neodymium magnet assembly |
|
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. |
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