Birmingham 1275 - 12 Inch Guitar Speaker, 75 Watt, 8 Ohm

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Classic British Rock Tone Inspired by the Iconic Sounds of the '60s and '70s

This speaker has a unique personality and delivers a well-balanced sound from top to bottom with rich harmonic complexity. It has a punchy and well-defined low end that stays tight, a warm and expansive midrange, and a gritty yet clear high end that soars with articulation.

  • British tone guitar speaker
  • 12 inch (305 mm) steel basket diameter
  • 75 watts, 8 ohm, 100 dB SPL
  • 1.75-inch copper voice coil, Nomex former
  • Kurt Müller speaker cone
  • 50 oz. ferrite magnet

For the 16 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 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.

More Information
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) +/- 15% 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 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