We Speak Your Tone 
Belfast 820 - 8 Inch Guitar Speaker, 20 Watt, 4 Ohm
WHEN YOUR TONE FALLS INTO PLACE LIKE THE FLICK OF A SWITCH...
The Belfast 820 provides players and listeners with a well-tailored and satisfyingly clear response. This model gives your tone a defined contour—open and present lows, soft mids, and glassy/articulate highs—that will make your lead and solo lines soar.
Upgrade your 8-inch guitar speaker cabinet with this high-sensitivity driver, combining a powerful ferrite magnet motor, a 1-inch copper voice coil, a paper composite cone, and a pair of dual terminals for easy connectivity and installation, with a sturdy steel basket to hold it all in place.
- British tone guitar speaker
- 8 inch (203 mm) steel basket diameter
- 20 watts, 4 ohm, 97 dB SPL
- 1-inch copper voice coil, Kraft paper former
- 10 oz ferrite magnet
- Paper composite cone
CHECK OUR DISTRIBUTORS PAGE for international customers to see what is available near you.
ToneSpeak guitar speakers result from 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.
| Brand Name | ToneSpeak |
|---|---|
| Size, Nominal (inch & mm) | 8" (203 mm) |
| Shape of Speaker | Round |
| Speaker Type | Guitar Speaker |
| Application | Musical Instruments |
| Environment | Indoor |
| RoHS Compliant | Yes |
| Nominal Impedance (Z) (Ω) | 4 |
| Rated Power IEC268-5 (W) | 20 Watts |
| Rated Impedance (Ω) | 4 |
| Continuous Power (W) | 20 |
| Program Power (W) | 40 |
| Frequency Range (Hz) | 88 - 11,000 |
| Sensitivity (dB SPL) ¹ | 97 |
| Resonant Frequency (Fs) (Hz) +/- 15% | 155 |
| DC Resistance (Re) (Ω) | 3.4 |
| Voice Coil Inductance (Le) (mH) | 0.12 |
| Mechanical Q Factor (Qms) | 15.49 |
| Electrical Q Factor (Qes) | 1.77 |
| Total Q Factor (Qts) | 1.59 |
| Mechanical Resistance (Rms) (kg/s) | 0.58 |
| Compliance Equivalent Volume (Vas) (L) | 8.31 |
| Suspension Compliance (Cms) (mm/N) | 0.11 |
| Surface Area of Diaphragm (Sd) (cm²) | 226.98 |
| Moving Mass (Mms) (gm) | 9.22 |
| Magnetic Gap Height (mm) | 6.0 |
| Coil Winding Height (mm) | 6.35 |
| Motor Force Factor (BL) (T•M) | 4.17 |
| Efficiency (η₀) (%) | 1.69 |
| Efficiency Bandwidth Product (EBP) (Fs/Qes) | 87.88 |
| Basket Type | Stamped steel with black powder coating |
| Terminal Size (mm) | 5.2 x 0.5 |
| Voice Coil Diameter (mm) | 25.4 |
| Voice Coil Wire Material | copper |
| Voice Coil Former Material | Kraft paper |
| Voice Coil Winding Style | Single Layer |
| Magnet Material | Ferrite |
| Magnet Weight (g) | 283.5 |
| Cone Body Material | Paper composite |
| Dust Cap Material | Paper |
| Spider Material | Cotton |
| Net Weight (kg) | 1.02 |
| Technical Notes | ¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance |