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Birmingham 1275 - 12" Guitar Speaker, 75 Watt, 8 Ohm
![Birmingham 1275 - 12" Guitar Speaker, 75 Watt, 8 Ohm Birmingham 1275 - 12" Guitar Speaker, 75 Watt, 8 Ohm](https://mcbrideloudspeaker.com/images/P/birmingham_01.png)
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Classic British rock tone, inspired by tones from the ‘60s and ‘70s.
This speaker has a personality all its own, with balance from top to bottom and rich harmonic complexity. Good punch and definition in the lows that won’t get flabby, a warm, throaty, and broad midrange, and nice grit with soaring articulation in the highs.
- 12” speaker
- 75 watts
- 8 ohm
- 50 oz. magnet
- 1.75” voice coil diameter
- Nomex voice coil former
ToneSpeak guitar speakers are the result of years and years of the deep-dive for the perfect tone. Decades of testing, field experience and conversations with elite tone-chasers have all been poured into these fine products. When you play ToneSpeak, you play the best.
Brand Name | ToneSpeak |
---|---|
Size, Nominal (inch & mm) | 12" (305 mm) |
Shape of Speaker | Round |
Speaker Type | Guitar Speaker |
Application | Musical Instruments |
Environment | Indoor |
RoHS Compliant | Yes |
Nominal Impedance (Z) (Ω) | 8 |
Rated Power IEC268-5 (W) | 75 Watts |
Frequency Range (Hz) | 80 - 5,000 |
Sensitivity (dB SPL) ¹ | 100 |
Resonant Frequency (Fs) (Hz) | 93 |
DC Resistance (Re) (Ω) | 7.1 |
Voice Coil Inductance (Le) (mH) | 0.37 |
Mechanical Q Factor (Qms) | 20.81 |
Electrical Q Factor (Qes) | 0.71 |
Total Q Factor (Qts) | 0.69 |
Mechanical Resistance (Rms) (kg/s) | 0.84 |
Compliance Equivalent Volume (Vas) (L) | 40.2 |
Suspension Compliance (Cms) (mm/N) | 0.1 |
Surface Area of Diaphragm (Sd) (cm²) | 539.1 |
Moving Mass (Mms) (gm) | 29.9 |
Motor Force Factor (BL) (T•M) | 13.09 |
Efficiency (η₀) (%) | 4.35 |
Efficiency Bandwidth Product (EBP) (Fs/Qes) | 130.15 |
Basket Type | Stamped Steel with black powder coat painting |
Terminal Size (mm) | 5.2 x 0.5 |
Voice Coil Diameter (mm) | 44 |
Voice Coil Wire Material | High temperature copper |
Voice Coil Former Material | Nomex |
Voice Coil Winding Style | Single Layer |
Magnet Material | Ferrite |
Magnet Weight (gm) | 1417 |
Cone Body Material | Felted paper |
Cone Surround Material | Felted paper with damping edge treatment |
Dust Cap Material | Open cloth |
Spider Material | Cotton |
Net Weight (kg) | 5.9 |