| Content | The G12M Greenback has evolved over the decades but still retains its essential, sought-after tone.
This version exhibits all the classic G12M characteristics but is voiced with additional broad mid-range attack and restrained top-end to give a forward, punchy attitude to chords and a searing lead tone without fizz.
With its well-controlled low-end it can be used singly in low-powered amps, or in multiples for high-power rock heads. It's an ideal speaker to bring drive and definition to modern high gain amps.
The original G12M of the 1960s was Celestionʼs first guitar speaker to use a ceramic magnet and paved the way for high power guitar amplifiers. The G12M uses a medium weight magnet to produce a sound that is smooth and warm but bright enough to hold its own against any rock backline.
Known simply these days as the ʽGreenbackʼ, the G12Mʼs fabled ʽbrown toneʼ is characterised by a warm, controlled low-end, a rich, vocal mid-range and a delicate, detailed top-end. Loaded into a 4x12 and driven hard, these speakers exude warm, crunchy chords and sweet searing single-notes.
| General specifications |
| Nominal diameter |
12“, 309mm |
| Power Rating |
25W |
| Nominal impedance |
8Ω and 16Ω |
| Sensitivity |
96dB |
| Chassis type |
Pressed steel |
| Voice coil diameter |
1.75“, 44.5mm |
| Voice coil material |
Round copper |
| Magnet type |
Ceramic |
| Magnet weight |
35oz, 0.99kg |
| Frequency range |
75-5000Hz |
| Resonance frequency, Fs |
75Hz |
| DC resistance, Re |
6.57Ω & 12.3Ω |
| Mounting Information |
| Diameter |
12.2“, 309mm |
| Overall depth |
5.1“, 130mm |
| Magnet structure diameter |
5.9“, 150mm |
| 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 |
7.9lb, 3.6kg |
|
| 400 W continuous program power capacity |
| | 70° nominal coverage |
| | 60 – 18000 Hz response |
| | 96 dB sensitivity |
| | Single Neodymium magnet assembly |
| | XO-6 dedicated crossover network |
|
Originally created as a higher-power handling variant of the G12M Greenback, the G12-65 is widely regarded as one of the best speakers ever produced for use in a 4x12 cabinet.
With its fast attack and tightly controlled low-end, the G12-65 became a firm favourite in the ʼ80s with hard rock players. The precisely tuned midrange and crisp defined top-end contribute to an aggressive crunch sound that punches through the mix while the mid-range warmth and detail give weight and depth to single notes.
| General specifications |
|---|
| Nominal diameter | 12“, 305mm | | Power Rating | 65W | | Nominal impedance | 8Ω and 15Ω | | Sensitivity | 97dB | | Chassis type | Pressed steel | | Voice coil diameter | 1.75“, 44.5mm | | Voice coil material | Rounded copper | | Magnet type | Ceramic | | Magnet weight | 35oz, 0.99kg | | Frequency range | 80-5000Hz | | Resonance frequency, Fs | 85Hz | | DC resistance, Re | 6.9Ω & 11.8Ω | | Mounting Information | | Diameter | 12.2“, 309mm | | Overall depth | 5.0“, 128mm | | Magnet structure diameter | 5.7“, 145mm | | 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 | 12.1lb, 5.5kg |
| 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
|
| 700 W continuous program power capacity |
|
| 80° nominal coverage |
|
| 55 – 20000 Hz response |
|
| 99 dB sensitivity |
|
| XO-3 dedicated crossover network |
|
| 2000 W continuous program power capacity |
|
| 100 mm (4 in) copper voice coil |
|
| 45 – 1000 Hz response |
|
| 95 dB sensitivity |
|
| Aluminium demodulating ring allows a very low distortion figure |
|
| Double silicone spider with optimized compliance |
|
| Ventilated voice coil gap for reduced power compression |
|
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