Speak Your Tone 
Dartford 1220 - 12" Guitar Speaker, Alnico Magnet, 20 Watt, 8 Ohm
- MSRP$349.99
- Buy 1 - 4$299.99
- Buy 5+Request a Quote
Guitar speakers with alnico magnets have been around since the dawn of guitar amplification. Known for their warm tone and fast response, they have remained a mainstay among tone purists despite the advancements of more modern magnet materials. When compressed, alnico speakers can produce the most desired “vintage” tonal characteristics, and are a favorite choice for blues, rock and jazz guitarists worldwide.
The 12” Dartford guitar speaker is no exception, harnessing the magical combination of alnico with a British paper cone to produce those highly sought after warm, full and throaty mids. The moderately full lows are tight and punchy, while the highs offer the classic bell-like chime.
- British tone guitar speaker
- 12" (305 mm) steel basket diameter
- 20 watts, 8 ohm, 99 dB SPL
- 1.75" copper voice coil, paper former
- Full paper cone
- Proprietary edge doping
- 34 oz. alnico ring magnet
Turn your amp into a vintage time machine with the Dartford 12” alnico guitar
speaker from ToneSpeak.
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 | No |
| Nominal Impedance (Z) (Ω) | 8 |
| Rated Power IEC268-5 (W) | 20 Watts |
| Continuous Power (W) | 20 |
| Program Power (W) | 40 |
| Frequency Range (Hz) | 75 - 5,000 |
| Sensitivity (dB SPL) ¹ | 99 |
| Resonant Frequency (Fs) (Hz) | 91 |
| DC Resistance (Re) (Ω) | 5.8 |
| Voice Coil Inductance (Le) (mH) | 0.32 |
| Mechanical Q Factor (Qms) | 18.78 |
| Electrical Q Factor (Qes) | 1.07 |
| Total Q Factor (Qts) | 1.01 |
| Mechanical Resistance (Rms) (kg/s) | 0.71 |
| Compliance Equivalent Volume (Vas) (L) | 36.55 |
| Suspension Compliance (Cms) (mm/N) | 0.1 |
| Surface Area of Diaphragm (Sd) (cm²) | 502.7 |
| Moving Mass (Mms) (gm) | 30.17 |
| Motor Force Factor (BL) (T•M) | 9.66 |
| Motive Force (BL²/Re) (T•m²)/Ω) | 16.09 |
| Efficiency (η₀) (%) | 2.44 |
| Efficiency Bandwidth Product (EBP) (Fs/Qes) | 84.05 |
| Basket Type | Stamped steel |
| Terminal Size (mm) | 5.2 x 0.5 (Dual lug) |
| Voice Coil Diameter (mm) | 44.5 |
| Voice Coil Wire Material | Copper |
| Voice Coil Former Material | Paper |
| Voice Coil Winding Style | Single Layer |
| Magnet Material | Alnico |
| Magnet Weight (g) | 963.9 |
| Cone Body Material | Paper (Kurt Muller) |
| Cone Surround Material | Paper (Kurt Muller) |
| Dust Cap Material | Cloth |
| Spider Material | Cotton |
| Net Weight (kg) | 2.72 |
| Technical Notes | ¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance |