World class Rogers JR149
The bbc LS35A beater, which was the world's best mini Monitor
You simply won't find another set like these
Fully Restored and Recapped professionally
No Offers or time wasters please
these are Simply wonderful vintage high end speakers They are sympathetically restored with new Falcon T27’s, new ribbed grill foam, they have been recapped and have good quality 4mm binding posts fitted. They sound fantastic
The Jim Rogers JR149 is an iconic British vintage loudspeaker introduced in 1977. Designed by Jim Rogers—the original founder of Rogers International—the JR149 was created as a radical evolution of the legendary BBC LS3/5A mini-monitor, wrapping the same internal DNA in a distinct, anti-resonant cylindrical cabinet. [1, 2, 3, 4]
The Design Philosophy
Instead of utilizing a traditional rectangular wooden box, the JR149 features a seamless, heavy-gauge aluminum cylinder topped and bottomed with solid wood end caps. [1, 2]
Acoustic Benefits: The cylindrical shape provides extreme structural rigidity, completely eliminates flat-panel resonances, and prevents internal standing waves. [1, 2]
Internal Tension: An internal steel threaded rod holds the top and bottom fibre discs in permanent tension, creating a slightly concave structure that heavily dampens the enclosure. [1, 2, 3]
Aesthetics: The outside of the cylinder is wrapped in a distinctive foam "sock" or speaker cloth, creating a minimalist, timeless look. [1, 2]
Drivers & Performance
Because Jim Rogers helped pioneer the BBC LS3/5A, he utilized the exact same classic KEF drive units for the JR149: [1, 2]
Mid/Bass Driver: KEF B110A (SP1003) 5-inch Bextrene cone unit.
Tweeter: KEF T27 (SP1032) 3/4-inch Mylar dome unit. [1, 2]
Sonically, the JR149 is celebrated for its world-class stereo imaging, expansive soundstage, and highly accurate vocals. Because of its unique cylindrical cabinet, it often provides a slightly more generous and "rounded" bass response than a standard rectangular LS3/5A, though it still lacks deep sub-bass or high-volume impact due to its small size. [1, 2, 3, 4]
Drivers & Performance
Because Jim Rogers helped pioneer the BBC LS3/5A, he utilized the exact same classic KEF drive units for the JR149: [1, 2]
Mid/Bass Driver: KEF B110A (SP1003) 5-inch Bextrene cone unit.
Tweeter: KEF T27 (SP1032) 3/4-inch Mylar dome unit. [1, 2]
Sonically, the JR149 is celebrated for its world-class stereo imaging, expansive soundstage, and highly accurate vocals. Because of its unique cylindrical cabinet, it often provides a slightly more generous and "rounded" bass response than a standard rectangular LS3/5A, though it still lacks deep sub-bass or high-volume impact due to its small size. [1, 2, 3, 4]
Differences in Crossovers
While the drivers are identical to the LS3/5A, the JR149's round PCB crossover is uniquely housed in a separate metal compartment hidden underneath the base of the speaker. Unlike the LS3/5A, which relies on a multi-link system to adjust treble, the JR149 uses a built-in potentiometer (variable resistor) to trim the tweeter level. Later "Gold Logo" variants also integrated an inline fuse to protect the delicate KEF T27 tweeter from overloading.
The Jim Rogers JR149 is an iconic British vintage loudspeaker introduced in 1977. Designed by Jim Rogers—the original founder of Rogers International—the JR149 was created as a radical evolution of the legendary BBC LS3/5A mini-monitor, wrapping the same internal DNA in a distinct, anti-resonant cylindrical cabinet. [1, 2, 3, 4]
The Design Philosophy
Instead of utilizing a traditional rectangular wooden box, the JR149 features a seamless, heavy-gauge aluminum cylinder topped and bottomed with solid wood end caps. [1, 2]
Acoustic Benefits: The cylindrical shape provides extreme structural rigidity, completely eliminates flat-panel resonances, and prevents internal standing waves. [1, 2]
Internal Tension: An internal steel threaded rod holds the top and bottom fibre discs in permanent tension, creating a slightly concave structure that heavily dampens the enclosure. [1, 2, 3]
Aesthetics: The outside of the cylinder is wrapped in a distinctive foam "sock" or speaker cloth, creating a minimalist, timeless look. [1, 2]
Drivers & Performance
Because Jim Rogers helped pioneer the BBC LS3/5A, he utilized the exact same classic KEF drive units for the JR149: [1, 2]
Mid/Bass Driver: KEF B110A (SP1003) 5-inch Bextrene cone unit.
Tweeter: KEF T27 (SP1032) 3/4-inch Mylar dome unit. [1, 2]
Sonically, the JR149 is celebrated for its world-class stereo imaging, expansive soundstage, and highly accurate vocals. Because of its unique cylindrical cabinet, it often provides a slightly more generous and "rounded" bass response than a standard rectangular LS3/5A, though it still lacks deep sub-bas