sensitivity & impedance curves
Input: 2.83 volts measured at 1 Meter
0 deg response
30 deg response
60 deg response
impedance
Detroit 820
The Detroit 820 from ToneSpeak delivers an authentic, powerful tone designed specifically for guitarists looking to amplify their blues or rock sound. With its premium USA-made hemp composite cone, the Detroit 820 offers rich, full-bodied lows, punchy mids, and smooth, creamy highs that provide balanced clarity and character.
This 8” speaker is engineered with a robust 10 oz. ferrite magnet and a responsive 1” copper voice coil on a durable Kraft paper former, ensuring exceptional sensitivity and precise tonal control. Easy installation is assured through dual-lug terminals, simplifying connectivity for both stage and studio use.
Whether laying down dynamic rhythms or expressive solos, the Detroit 820 enhances your playing with unmistakable vintage warmth and clarity.
Key Features:
- 8-inch (203 mm) guitar speaker
- 20 watts, 4 Ohm impedance
- 94 dB SPL sensitivity (@1W/1m)
- Frequency range: 80 Hz - 5 kHz
- Powerful 10 oz. ferrite magnet
- USA-made hemp cone for warm, rich tone
- 1” copper voice coil with durable Kraft paper former
Elevate your sound and speak your tone clearly with the Detroit 820 by ToneSpeak.
sensitivity & impedance curves
Input: 2.83 volts measured at 1 Meter
0 deg response
30 deg response
60 deg response
impedance
Where to buy
Canada
germany
japan
general specifications
| parameter | value |
|---|---|
| Nominal Diameter (in & mm) | 8" (203 mm) |
| Nominal Impedance (Z) (Ω) | |
| Rated Power IEC268-5 (W) | 20 |
| Program Power (W) | 40 |
| Magnet Weight (g) | 284 |
| Voice Coil Diameter (mm) | |
| Sensitivity (dB SPL) | 94 |
| Frequency Range (Hz) | 80 - 10000 |
small signal parameters
| parameter | value |
|---|---|
| Resonant Frequency (Fs) (Hz) +/- 15% | 139 |
| DC Resistance (Re) (Ω) | 3.4 |
| Voice Coil Inductance (Le) (mH) | 0.12 |
| Moving Mass (Mms) (gm) | 8.28 |
| Suspension Compliance (Cms) (mm/N) | 0.16 |
| Motor Force Factor (BL) (T•M) | 2.36 |
| Mechanical Q Factor (Qms) | 16.36 |
| Electrical Q Factor (Qes) | 4.45 |
| Total Q Factor (Qts) | 3.45 |
| Compliance Equivalent Volume (Vas) (L) | 10.92 |
| Surface Area of Diaphragm (Sd) (cm²) | 221.67 |
material description
| parameter | value |
|---|---|
| Basket Type | Stamped steel with black powder coat |
| Magnet Material | Ferrite |
| Cone Body Material | Hemp |
| Cone Surround Material | |
| Dust Cap Material | Felt |
| Spider Material | Cotton |
| Voice Coil Wire Material | Copper |
| Voice Coil Former Material | Nomex |
| Voice Coil Winding Style | Single Layer |