10" Blackbird 40
|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|
|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|
|Voice Coil Winding||Copper|
|Voice Coil Former||Kapton|
|Surround Material||Integrated Paper|
|Dust Dome Material||Non-treated Cloth|
|Basket Material||Pressed Sheet Steel|
|Rated Power||40 W||40 W|
|Musical Power||80 W||80 W|
|Sensitivity@1W,1m||96.4 dB||95.4 dB|
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.
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.
When used with crunch and overdrive tones, it retains a focused, cutting response.