We Speak Your Tone 
Birmingham 1275 - 12 Inch Guitar Speaker, 75 Watt, 16 Ohm
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.
- British tone guitar speaker
- 12" (305 mm) steel basket diameter
- 75 watts, 16 ohm, 100 dB SPL
- 1.75" copper voice coil, nomex former
- Kurt Müller guitar cone
- 50 oz. ferrite magnet
For the 8 Ohm Birmingham 1275, CLICK HERE.
A flat shipping fee of $15 is applied to US customers.
For international customers, CHECK OUR DISTRIBUTORS PAGE to see what is available near you.
AVAILABLE NOW: Birmingham 1275 Impulse Response
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) | 16 |
| Rated Power IEC268-5 (W) | 75 Watts |
| Frequency Range (Hz) | 80 - 5,000 |
| Sensitivity (dB SPL) ¹ | 100 |
| Resonant Frequency (Fs) (Hz) +/- 15% | 104 |
| DC Resistance (Re) (Ω) | 13.9 |
| Voice Coil Inductance (Le) (mH) | 0.54 |
| Mechanical Q Factor (Qms) | 12.72 |
| Electrical Q Factor (Qes) | 0.91 |
| Total Q Factor (Qts) | 0.85 |
| Mechanical Resistance (Rms) (kg/s) | 1.49 |
| Compliance Equivalent Volume (Vas) (L) | 34.8 |
| Suspension Compliance (Cms) (mm/N) | 0.1 |
| Surface Area of Diaphragm (Sd) (cm²) | 551.6 |
| Moving Mass (Mms) (gm) | 29.0 |
| Motor Force Factor (BL) (T•M) | 17.0 |
| Efficiency (η₀) (%) | 4.12 |
| Efficiency Bandwidth Product (EBP) (Fs/Qes) | 114.18 |
| 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 (g) | 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 |
| Technical Notes | ¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance |