Belfast 820

British flag
Belfast 820Belfast 820Belfast 820Belfast 820
back side of the Belfast 820
front side of the Belfast 820
terminal of the Belfast 820
side of Belfast 820
ToneSpeak's seven year warranty logo
RoHS-Compliant logo
Made-in-Minnesota logo
ISO 9001-2015 certification logo
Klippel-verified logo

Elevate your guitar sound with the Belfast 820 by ToneSpeak, delivering articulate clarity and the classic British tonal character that guitarists crave. Expertly crafted, this speaker offers an expressive sonic profile—open, well-defined lows, smooth and warm mids, and shimmering, articulate highs, ideal for making your lead lines soar.

Designed with a powerful 10-ounce ferrite magnet and a high-performance 1-inch copper voice coil on a sturdy Kraft paper former, the Belfast 820 ensures exceptional responsiveness and tonal accuracy. Its high sensitivity rating of 97 dB SPL means your playing cuts through clearly, delivering impactful sound whether you're on stage or in the studio.

Installation is effortless, thanks to dual-lug terminals for straightforward connectivity, all housed within a robust steel basket that guarantees durability and consistent performance.

Key Features:

  • 8-inch (203 mm), 20-Watt power handling at 4 Ω impedance
  • High sensitivity (97 dB SPL) for standout projection
  • Premium paper composite cone delivering crisp British-style clarity
  • Robust 10 oz. ferrite magnet for dynamic responsiveness
  • Reliable 1” copper voice coil with Kraft paper former
  • Solid, steel basket construction for dependable stage and studio use

Bring your sound to life with defined precision and authentic British tone—choose the Belfast 820 by ToneSpeak.

sensitivity & impedance curves

Input: 2.83 volts measured at 1 Meter

frequency and impedance response graph of the ToneSpeak of the Belfast 820
0 deg response
30 deg response
60 deg response
impedance

general specifications

Nominal Diameter (in & mm)8" (203 mm)
Nominal Impedance (Z) (Ω)
Rated Power IEC268-5 (W)20
Program Power (W)
Magnet Weight (g)284
Voice Coil Diameter (mm)25
Sensitivity (dB SPL)97
Frequency Range (Hz)88 - 11000

small signal parameters

Resonant Frequency (Fs) (Hz) +/- 15%155
DC Resistance (Re) (Ω)3.4
Voice Coil Inductance (Le) (mH)0.12
Moving Mass (Mms) (gm)9.22
Suspension Compliance (Cms) (mm/N)0.11
Motor Force Factor (BL) (T•M)4.17
Mechanical Q Factor (Qms)15.49
Electrical Q Factor (Qes)1.77
Total Q Factor (Qts)1.59
Compliance Equivalent Volume (Vas) (L)8.31
Surface Area of Diaphragm (Sd) (cm²)226.98

material description

Basket TypeStamped steel with black powder coating
Magnet MaterialFerrite
Cone Body MaterialPaper composite
Cone Surround MaterialPaper composite
Dust Cap MaterialPaper
Spider MaterialCotton
Voice Coil Wire Materialcopper
Voice Coil Former MaterialKraft paper
Voice Coil Winding StyleSingle layer

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