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- Birmingham 1275 - 12" Guitar Speaker, 75 Watt, 8 Ohm
Birmingham 1275 - 12" Guitar Speaker, 75 Watt, 8 Ohm
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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 |
