Input: 2.83 volts measured at 1 Meter
Dartford 1220













Since the earliest days of electric guitar amplification, alnico magnets have shaped the warm, dynamic tones that define blues, rock, and jazz. The Dartford 1220 continues this tradition, offering players a vintage-inspired sound with modern reliability.
This 12-inch speaker pairs a powerful 34 oz. alnico magnet with a proprietary British paper cone, delivering warm, resonant mids, punchy lows, and a signature chime in the highs. With its naturally responsive and expressive character, the Dartford 1220 enhances the depth and detail of your playing, making it an essential upgrade for musicians seeking tonal perfection.
Key Features:
- 12-inch (305 mm), 20-Watt power handling at 8 Ω impedance
- 99 dB SPL sensitivity for rich projection
- 34 oz. alnico ring magnet for vintage warmth and dynamics
- 1.75-inch copper voice coil with a paper former for authentic tone
- Full paper cone with proprietary edge doping for enhanced response
Crafted for those who crave classic tone and expressive articulation, the Dartford 1220 transforms your amplifier into a vehicle for timeless sound.
sensitivity & impedance curves
Input: 2.83 volts measured at 1 Meter
Where to buy
Canada
germany
japan
general specifications
parameter | value |
---|---|
Nominal Diameter (in & mm) | 12" (305 mm) |
Nominal Impedance (Z) (Ω) | |
Rated Power IEC268-5 (W) | 20 |
Program Power (W) | 40 |
Magnet Weight (g) | 964 |
Voice Coil Diameter (mm) | 45 |
Sensitivity (dB SPL) | 99 |
Frequency Range (Hz) | 75 - 5000 |
small signal parameters
parameter | value |
---|---|
Resonant Frequency (Fs) (Hz) +/- 15% | 91 |
DC Resistance (Re) (Ω) | 5.8 |
Voice Coil Inductance (Le) (mH) | 0.32 |
Moving Mass (Mms) (gm) | 30.17 |
Suspension Compliance (Cms) (mm/N) | 0.1 |
Motor Force Factor (BL) (T•M) | 9.66 |
Mechanical Q Factor (Qms) | 18.78 |
Electrical Q Factor (Qes) | 1.07 |
Total Q Factor (Qts) | 1.01 |
Compliance Equivalent Volume (Vas) (L) | 36.55 |
Surface Area of Diaphragm (Sd) (cm²) | 502.7 |
material description
parameter | value |
---|---|
Basket Type | Stamped steel |
Magnet Material | Alnico |
Cone Body Material | Paper (Kurt Muller) |
Cone Surround Material | Paper (Kurt Muller) |
Dust Cap Material | Cloth |
Spider Material | Cotton |
Voice Coil Wire Material | Copper |
Voice Coil Former Material | Paper |
Voice Coil Winding Style | Single Layer |