Scottsdale 1220

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Scottsdale 1220Scottsdale 1220Scottsdale 1220Scottsdale 1220
back side of the Scottsdale 1220
front side of the Scottsdale 1220
terminal of the Scottsdale 1220
side of the Scottsdale 1220
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Alnico guitar speakers have shaped electric guitar tone since the earliest days of amplification. Known for their fast response, warmth, and rich harmonic character, they remain a top choice for players seeking vintage tonal depth. The Scottsdale 1220 embodies this tradition, offering a full-bodied American-voiced tone that excels in blues, rock, and jazz.

This 12-inch speaker is powered by a 34 oz. alnico ring magnet, delivering warm, defined lows, smooth and natural mids, and crisp, glassy highs. Its proprietary edge-doped full paper cone enhances resonance and dynamic response, making it an excellent choice for players who value touch sensitivity and expressive sound.

Key Features:

  • 12-inch (305 mm), 20-Watt power handling at 8 Ω impedance
  • 99 dB SPL sensitivity for excellent projection
  • 34 oz. alnico ring magnet for vintage warmth and dynamic response
  • 1.75-inch copper voice coil with a paper former for authentic tone
  • Full paper cone with proprietary edge doping for balanced articulation

For musicians who demand vintage warmth with modern reliability, the Scottsdale 1220 delivers an expressive, dynamic sound with rich American character.

sensitivity & impedance curves

Input: 2.83 volts measured at 1 Meter

frequency and impedance response graph of the ToneSpeak Scottsdale 1220
0 deg response
30 deg response
60 deg response
impedance

general specifications

Nominal Diameter (in & mm)12" (305 mm)
Nominal Impedance (Z) (Ω)
Rated Power IEC268-5 (W)20
Program Power (W)40
Magnet Weight (g)964
Voice Coil Diameter (mm)45
Sensitivity (dB SPL)99
Frequency Range (Hz)75 - 5000

small signal parameters

Resonant Frequency (Fs) (Hz) +/- 15%90
DC Resistance (Re) (Ω)6.2
Voice Coil Inductance (Le) (mH)0.35
Moving Mass (Mms) (gm)28.5
Suspension Compliance (Cms) (mm/N)0.1
Motor Force Factor (BL) (T•M)11.74
Mechanical Q Factor (Qms)23.13
Electrical Q Factor (Qes)0.74
Total Q Factor (Qts)0.72
Compliance Equivalent Volume (Vas) (L)39.3
Surface Area of Diaphragm (Sd) (cm²)510.7

material description

Basket TypeStamped Steel
Magnet MaterialAlnico
Cone Body MaterialFull-Body Paper
Cone Surround MaterialFull-Body Paper
Dust Cap MaterialCloth
Spider MaterialCotton
Voice Coil Wire MaterialCopper
Voice Coil Former MaterialPaper
Voice Coil Winding StyleSingle Layer

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