Speaker - Jensen® Vintage Alnico, 12", P12Q, 40W

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Speaker - Jensen® Vintage Alnico, 12", P12Q, 40W

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The P12Q is a lower power sibling to the P12N, with a smaller voice coil and a vintage steel basket, nicknamed the “hot dog” or “sausage” because of the shape of the openings in its basket frame. Warm and balanced sounding, with a nice bite in the upper midrange, it is a very interesting allrounder, for many different applications from the traditional country and jazz tones to the more aggressive rock and roll and blues application. Typically it was found in ‘holy grail’ amps such as the vintage Tweed Deluxe and other similar models as well as the Ampeg® Jet, Gibson® GA-20 and many more.

Guitarist Description: Very warm, mid-focused bite with clear bright highs. When presented with overdrive distortion it remains well balanced.

  • Lows: Loose
  • Mids: Firm
  • Highs: Smooth
  • Overdrive: Edgy

For more information about our Jensen® speakers, see our tech corner article on Jensen Speakers.

RoHS Compliant
Item ID:
JensenJensen VintageAlnico
Part Numbers
ImpedanceOur Part NumberUPC/EAN
16 ΩP-A-P12Q-168034028640414
32 ΩP-A-P12Q-328034028641725
8 ΩP-A-P12Q-88034028640407
Product Measurements
Basket MaterialPressed Sheet Steel
Cone MaterialPaper
Depth5.6732 in.
Diameter12 in.
Diaphragm Area (SD)8 Ω version490.90 cm2
16 Ω version490.90 cm2
32 Ω version490.00 cm2
Dust Dome MaterialSolid Paper
Equivalent Acoustic Volume (VAS)8 Ω version39.5 liters
16 Ω version41.20 liters
32 Ω version46.60 liters
Flux Density0.98 T
Force Factor (BxL)8 Ω version5.88 Wb/m
16 Ω version8.05 Wb/m
32 Ω version10.15 Wb/m
Inner Diameter10.9055 in.
Linear Displacement, maximum (XMAX)1.00 mm
Losses Electrical Resistance (RES)8 Ω version25.50 Ω
16 Ω version56.30 Ω
32 Ω version82.70 Ω
Magnet Assembly Depth2.1653 in.
Magnet Assembly Diameter2.7559 in.
Magnet TypeAlnico
Magnetic Gap Depth6.00 mm
Mechanical Compliance (CMS)8 Ω version115.00 µm/N
16 Ω version122.00 µm/N
32 Ω version138.00 µm/N
Mechanical Moving Mass (MMS)8 Ω version26.80 g
16 Ω version25.90 g
32 Ω version25.30 g
Mechanical Q Factor (QMS)8 Ω version11.57
16 Ω version12.68
32 Ω version10.94
Mounting Hole Bolt Circle Diameter11.5551 in.
Mounting Hole Diameter0.2559 in.
Musical Power80.00 W
Nominal Overall Diameter306.00 mm
Nominal Voice Coil Diameter32.00 mm
Outer Diameter12.0275 in.
Rated Power40.00 W
Reference Efficiency (nO)8 Ω version1.42 %
16 Ω version1.02 %
32 Ω version0.84 %
Resonance Frequency (ƒS)8 Ω version90.50 Hz
16 Ω version90.00 Hz
32 Ω version85.60 Hz
Sensitivity @ 1W, 1m8 Ω version94.40 dB
16 Ω version96.10 dB
32 Ω version92.30 dB
Surround MaterialIntegrated Paper
Surround TreatmentNo
Total Q Factor (QTS)8 Ω version2.03
16 Ω version2.30
32 Ω version2.55
Voice Coil DC Resistance (Re)8 Ω version5.60 Ω
16 Ω version12.45 Ω
32 Ω version25.20 Ω
Voice Coil Diameter1.25 in.
Voice Coil FormerNomex
Voice Coil Inductance @ 1 kHZ (LE)8 Ω version0.67 mH
16 Ω version0.60 mH
32 Ω version1.59 mH
Voice Coil Winding Depth8.00 mm
Voice Coil Winding TypeCopper
Packaging Information
Packaging Dimensions13.3858 in. × 13.3858 in. × 7.874 in.
Weight (Packaging)5.35 lbs.

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Specifications, Files, and Documents

Sound Samples:

PDF: Specification Sheet Specification Sheet236.36 KB
PNG: Terminal Dimensions Terminal Dimensions21.21 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on April 25th, 2017.
Matt H
April 25th, 2017
Ideally you want the wattage of your speaker to be as close to double that of your amp. If you will be strictly playing this at low volume (below 4 on the volume dial) then it should work. But if you plan on cranking your amp, you run a good chance of blowing this speaker.
Asked by Anonymous on April 26th, 2018.
Matt H
April 27th, 2018
These would be a nice option if you are trying to get more of a vintage American tone form the AC30.

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