10" Blackbird 40

10" Blackbird 40

General Characteristics
Nominal Overall Diameter 259 mm 10 in
Nominal Voice Coil Diameter 32 mm 1.26 in
Magnet Weight 360 g 13 oz
Overall Weight 1.7 kg 3.75 lbs
Flux Density 1.28 T
Voice Coil Winding Depth 9 mm 0.35 in
Magnetic Gap Depth 6 mm 0.24 in
Thiele-Small Parameters
Nominal Impedance 16Ω
Voice Coil DC Resistance RE 5.6 Ω 12.1 Ω
Resonance Frequency ƒS 91.8 Hz 95.2 Hz
Mechanical Q Factor QMS 13.05 13.42
Electrical Q Factor QES 1.27
Total Q Factor QTS 0.94 1.16
Mechanical Moving Mass MMS 18.5 g 18 g
Mechanical Compliance CMS 162 µm/N 155 µm/N
Force Factor BxL 7.68 Wb/m 10.1 Wb/m
Equivalent Acoustic Volume VAS 25.1 lt. 24 lt.
Diaphragm Area SD 330.1 cm2 330.1 cm2
Voice Coil Inductance @ 1kHz LE 0.47 mH 0.6 mH
Constructive Characteristics
Magnet Reinforced Alnico
Voice Coil Winding Copper
Voice Coil Former Kapton
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Non-treated Cloth
Basket Material Pressed Sheet Steel
Surround Treatment Yes
Electrical Characteristics
Nominal Impedance 16Ω
Rated Power 40 W 40 W
Musical Power 80 W 80 W
Sensitivity@1W,1m 96.4 dB 95.4 dB
40 watts
Available in 8Ω, 16Ω

The Jensen Blackbird 40 speakers are a revelation, and in a way, a revolution for us. They brilliantly combine the vintage dynamic sensitivity, the upper midrange attack and openness of the traditional AlNiCo speakers, with a tighter bass foundation and a refined top end that suits even modern, higher gain applications.

The 12” version is excellent in a small Combo or Extension and the 10” is truly impressive, sounding nearly as big and powerful as the bigger sibling, with the added immediacy and unique midrange that is an essential element in an iconic 10” speaker. 

- MESA/Boogie

The 10" Blackbird 40 is the smaller sibling of the 12" Blackbird 40, famous for its exclusive “Reinforced AlNiCo” magnet, and the 1 ¾” (32mm) copper-wound voice coil. 

The power rating of this smaller speaker mirrors the larger 12" at 40W, with a very similar efficiency - delivering more than 96dB with ease. The tonal qualities of this speaker are also very close; the 10" Blackbird 40 is distinctively vintage-voiced, with a warm-yet-solid bass range, the classic sparkle and chime that are associated with AlNiCo speakers, and all the immediacy and forwardness that are expected from a high quality 10” speaker.

Guitarist Description
Powerful and natural sound, with a solid and firm bass range. The midrange and treble are open and airy, with the typical immediacy of the best 10" speakers.
When used with crunch and overdrive tones, it retains a focused, cutting response.
Specification Sheet
Product Dimensions
Note: all dimensions are in mm.