Tonespeak Detroit 820 8" / 20 W / 4 Ohm

Turn heads with this 8" hempen guitar speaker, the Detroit 820. This model brings out an organic and vintage tweed sound, creating warm and full lows, strong and barky mids, and creamy highs to round out the top end.

The Detroit 820 is the perfect choice for guitarists looking for an upgrade to their blues or rock tone. High sensitivity, a hemp composite cone, a powerful ferrite magnet, dual-lug terminals for easy connectivity, and a sturdy steel basket come together to enhance your style and sound to make you the talk of the town.

American tone guitar speaker

• 8" (203 mm) steel basket diameter
• 20 watts, 4 ohm, 94 dB SPL
• 1" copper voice coil, Kraft paper former
• 10 oz ferrite magnet
• USA-made hemp cone
• Size, Nominal (inch & mm): 8" (203 mm)
• 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): 80 - 10,000
• Sensitivity (dB SPL) ¹: 94
• Resonant Frequency (Fs) (Hz): 139
• DC Resistance (Re) (Ω): 3.4
• Voice Coil Inductance (Le) (mH): 0.12
• Mechanical Q Factor (Qms): 15.36
• Electrical Q Factor (Qes): 4.45
• Total Q Factor (Qts): 3.45
• Mechanical Resistance (Rms) (kg/s): 0.47
• Compliance Equivalent Volume (Vas) (L): 10.92
• Suspension Compliance (Cms) (mm/N): 0.16
• Surface Area of Diaphragm (Sd) (cm²): 221.67
• Moving Mass (Mms) (gm): 8.28
• Magnetic Gap Height (mm): 6.0
• Coil Winding Height (mm): 6.35
• Motor Force Factor (BL) (T•M): 2.36
• Efficiency (η₀) (%): 0.64
• Efficiency Bandwidth Product (EBP) (Fs/Qes): 31.46
• Basket Type: Stamped steel with black powder coat
• Terminal Size (mm): 5.2 x 0.5
• Voice Coil Wire Material: Copper
• Voice Coil Former Material: Nomex
• Voice Coil Winding Style: Single Layer
• Magnet Material: Ferrite
• Magnet Weight (g): 283.5
• Cone Body Material: Hemp
• Dust Cap Material: Felt
• Spider Material: Cotton
• Net Weight (kg): 1.01