Rare Federal Signal TwinSonic Model 12 All‑Aluminum Speaker Mount Base – Original OEM

Description

Rare Federal Signal TwinSonic Model 12 All‑Aluminum Speaker Mount Base – Original OEM – Fits CTS also!

Uncovered one more of these extremely hard‑to‑find originals — a Rare Federal Signal TwinSonic Model 12 All‑Aluminum Speaker Mount Base (OEM).
This is a genuine Federal Signal factory part, not an aftermarket reproduction. It features the correct grommet wire pass‑through, allowing the speaker leads to route cleanly through the mount exactly as intended in the original TwinSonic setup.
The mounting plate is factory‑drilled with three speaker‑mount positioning holes, giving you the option to run one speaker centered or two speakers side‑by‑side — matching authentic Model 12 configurations using genuine Federal Speakers.
The top side has been professionally refinished in black for a clean, sharp presentation. The underside is intentionally left unpainted because the chain drive rides on that surface, and you never want paint interfering with chain contact or movement.
A true virgin OEM component with no extra or unwanted holes — your speakers will align exactly as Federal Signal intended. Correct all‑aluminum construction, exact dimensions, and authentic fitment make this ideal for restorers, collectors, and film‑industry builds.