BIRMINGHMA 1275  - 12" GUITAR SPEAKER 

THE TONE SPEAK BIRMINGHAM 1275 HAS A COMPLEX RICH HARMONICS FOR THAT CLASSIC BRITISH TONE!

ToneSpeak Birmingham 1275ToneSpeak Birmingham 1275

Birmingham 1275-8

 

Item Price: $159.99

Birmingham 1275-16

 

Item Price: $159.99

SPEAKER MODEL BIRMINGHAM 1275

SPECIFICATIONS

Nominal Basket Diameter

12" / 305mm

Impedance

8 & 16 ohms

RMS Power Rating 75 Watts
Peak Power Rating 150 Watts
Usable Frequency Response 80Hz - 5kHz
Voice Coil Diameter 1.73" / 44mm

Sensitivity (1W/1m)

100dB

Magnet Weight

50 oz.

Net Weight 12.98 lbs. / 5.9 kg.

MOUNTING INFORMATION

Overall Diameter 12.18" / 309.4mm
Bolt Circle Diameter 11.58" / 294.2mm
Baffle Cutout Diameter 10.85" / 275.5mm
No. Of Mounting Holes 8
Mounting Hole Diameter 0.26" / 6.5mm
Magnet Diameter 6.14" / 155.96mm
Overall Depth 5.16" / 131.06mm

MATERIALS

Basket Stamped Steel
Voice Coil High Temperature Copper
Coil Former Material Nomex
Dust Cap Open Cloth
Cone Felted Paper
Surround Felted Paper & Damping Edge Treated
Spider Cotton
Magnet Ferrite

THIELE-SMALL PARAMETERS

Resonant Frequency (fs) 93Hz
Impedance (Re) 7.1 ohms
Coil Inductance (Le) 0.37mH
Electromagnetic Q (Qes) 0.71
Mechanical Q (Qms) 20.81
Total Q (Qts) .69
Compliance Equiv. Vol. (Vas) 40.2Liters / 1.42 cu. ft.
BL Product (BL) 13.09 T-M
Diaphragm Mass (Mms) 29.9 Grams
Reference Efficiency 4.35%
Surface Area of Cone (Sd) .05391m2

Frequency Response

ToneSpeak Birmingham 1275 Frequency
Mounting Dimensions

ToneSpeak Birmingham 1275 Drawing

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