Rogers LS5/9
It weighs 12 kilograms and stands just under half a meter tall. It takes up space like a monitor that knows its job.
Overview
The Rogers LS5/9 is a working-grade BBC monitor, built for accuracy. The LS3/5A was engineered for tight control rooms and OB vans. The LS5/9 took on jobs that needed more bass extension and dynamic headroom, and it still met the BBC's strict Grade 1 monitor standards. It's a two-way, bass-reflex loudspeaker. The reflex loading helps the low end without making the cabinet too big for studio use. The bass/mid driver is a 210mm polypropylene unit made by Rogers themselves. It's paired with a 34mm Audax tweeter with phase correction to keep time coherence across the upper register. The crossover sits at 3kHz and is a third-order network, which fits the BBC's emphasis on smooth integration and off-axis consistency.
Frequency response is rated at 65Hz to 21kHz ±4dB, and axial performance reportedly holds within ±3dB across much of that range. That's not ruler-flat by modern standards, but it's honest, and in professional hands that mattered more. The cabinet is 9mm birch plywood, built to control resonance and to last in broadcast environments where reliability was non-negotiable. Production ended decades ago, but the LS5/9 kept a quiet presence in regional studios and mastering outposts long after its official retirement.
Key Features
210mm Polypropylene Bass/Mid Driver
The 210mm polypropylene cone is the core of the LS5/9. The material was chosen for its self-damping properties and resistance to deformation under sustained drive. Rogers made the driver in-house and tailored its motor system and surround to meet BBC specifications.
Audax 34mm Tweeter with Phase Correction
The Audax 34mm tweeter sits above the mid-bass unit. It's a dome design with integrated phase correction. That helps keep the wavefront coherent across the crossover region and cuts the time-domain smear that can cloud imaging. The phase plug and waveguide geometry were part of the BBC's effort to get consistent off-axis response. Control rooms have walls and consoles that throw reflections around, and those reflections could otherwise skew what the engineer hears.
Bass-Reflex Cabinet with 9mm Birch Plywood Construction
The LS5/9 breaks from the sealed-box design of the LS3/5A and uses a reflex-loaded cabinet, tuned to reinforce bass output around the lower end of its range. The enclosure is 9mm birch plywood, which has a high stiffness-to-mass ratio and good internal damping. Joints are tightly sealed and braced to minimize panel resonance, a common flaw in lesser monitors of the era.
Historical Context
The Rogers LS5/9 was developed under BBC specifications as a compact, high-power Grade 1 studio monitor for broadcasting environments where accuracy and reliability were paramount. It followed the LS3/5A, which the BBC Research Department developed in the early 1970s for small control rooms and outside broadcast vans. As a larger alternative, the LS5/9 offered extended bass response and higher output capability, which made it suitable for full-range program monitoring in regional studios and production suites. Rogers was already an approved manufacturer of the LS3/5A, and was granted a license to produce the LS5/9 alongside other BBC-approved builders. Exact production years remain undocumented. The speaker was in use for over two decades and has been out of production for many years.
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