TSB-12-250

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Elevate your bass performance with the TSB-12-250, a 12-inch bass guitar speaker designed to deliver deep, punchy lows with excellent clarity and responsiveness. Engineered with a 7 oz. neodymium magnet, this speaker provides rich, resonant tone while keeping the overall weight low for easy portability.

With 250 watts AES and 500 watts program power handling, the TSB-12-250 ensures tight, controlled bass, smooth mids, and articulate highs. Its 2.5-inch inside/outside copper voice coil, wound on a fiberglass former, enhances heat dissipation for consistent performance under demanding conditions. The paper cone with a cloth M-roll surround further refines the balance between warmth and precision.

Key Features:

  • 12-inch (304.8 mm) bass guitar speaker with pressed steel frame
  • 250 watts AES / 500 watts program power handling
  • 7 oz. neodymium magnet for high-powered, lightweight performance
  • 2.5-inch inside/outside wound copper voice coil with fiberglass former
  • Paper cone with cloth M-roll surround for deep, controlled bass
  • High sensitivity (98 dB SPL) for excellent projection

For bassists seeking power, clarity, and portability, the TSB-12-250 delivers a balanced, dynamic tone with the durability needed for any performance.

sensitivity & impedance curves

Input: 2.83 volts measured at 1 Meter

Input: 2.83 volts measured at 1 Meter

0 deg response
30 deg response
60 deg response
impedance

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general specifications

General Specifications
Nominal Diameter (in & mm)12" (305 mm)
Nominal Impedance (Z) (Ω)
Rated Power IEC268-5 (W)250
Program Power (W)500
Magnet Weight (g)198.4
Voice Coil Diameter (mm)63.5
Sensitivity (dB SPL)98
Frequency Range (Hz)50 -4000

small signal parameters

Small Signal Parameters
Resonant Frequency (Fs) (Hz) +/- 15%45
DC Resistance (Re) (Ω)5.6
Voice Coil Inductance (Le) (mH)0.53
Moving Mass (Mms) (gm)48.4
Suspension Compliance (Cms) (mm/N)0.26
Motor Force Factor (BL) (T•M)14.9
Mechanical Q Factor (Qms)8.54
Electrical Q Factor (Qes)0.34
Total Q Factor (Qts)0.33
Compliance Equivalent Volume (Vas) (L)104.23
Surface Area of Diaphragm (Sd) (cm²)530.93

material description

Material Description
Basket TypePressed steel
Magnet MaterialNeodymium
Cone Body MaterialPaper
Cone Surround MaterialCloth
Dust Cap MaterialFelt
Spider Material
Voice Coil Wire MaterialCopper
Voice Coil Former MaterialFiberglass
Voice Coil Winding StyleInside / Outside

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