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Up for sale/sale is a rare piece of broadcast audio history: a vintage RCA/Olson coaxial broadcast-monitor loudspeaker mechanism.
This mechanism represents an exceptional piece of engineering lineage associated with Harry F. Olson’s pioneering work on coaxial and split-coil designs for broadcast control rooms. Because of its scarcity, it is best suited for serious audio historians, vintage collectors, or museum display, as well as an advanced restoration project.
Specifications & Details
Nominal Impedance: Approximately 15 ohms nominal (measured DC resistance reads roughly 12.7 ohms, confirming healthy voice coil electrical continuity).
Frame Class: Compact broadcast/console format (falling into an intermediate size class distinct from standard 15-inch flagship LC-1 units).
Architecture: Features classic RCA high-frequency/low-frequency coaxial integration principles, showcasing an innovative mechanical approach to phase alignment and control room monitoring.
Condition Report
Cone Status: The speaker cone has physical damage and is compromised, meaning this unit is not in plug-and-play operating condition and is sold strictly as-is for parts, display, or expert restoration.
Voice Coil: Electrically continuous with a healthy DC resistance reading. The magnetic motor structure and cast basket are intact.
Please review all high-resolution photos carefully to assess the physical condition of the cone assembly and basket structure before purchasing.
Shipping & Handling
Professional Packaging: Vintage cast frames and fragile vintage assemblies require specialized care. This item will be securely double-boxed, immobilized, and heavily padded to ensure safe transit.
Shipping: Calculated shipping based on destination. Local pickup may be arranged for serious collectors.
