Vintage 1974 CTS 12" Alnico Speaker – 4 Ohm – Model EMT-12-2A (Smooth Cone)

Up for sale is a vintage 12-inch American-made Alnico horseshoe-magnet driver manufactured by CTS in early January 1974. This speaker is a phenomenal choice for low-wattage vintage tube amp restorations or boutique desktop builds requiring a true 4-ohm load.

Technical Bench Specs & Verification:

• EIA Factory Source Code: 137 7402 (CTS, 2nd week of 1974)
• Model Code: EMT-12-2A
• Impedance: Measures a rock-solid 3.4 Ohms DC Resistance on the bench meter, confirming a Nominal 4-Ohm voice coil setup.
• Magnet Array: Classic mid-century style Alnico slug housed in a heavy steel U-yoke/horseshoe channel.
• Cone Architecture: Vintage smooth paper cone layout with a paper center dust cap. This speaker features a clean, older recone job. The cone moves completely freely with zero voice coil rub.

Sonic Profile & Application: These 1970s CTS Alnico frames are highly prized by guitarists for their warm, organic mid-range compression and smooth musical breakup when pushed by a small tube output transformer. Originally engineered for vintage home organs and console stereos to replicate a wide frequency sweep smoothly, the smooth paper cone makes it a perfect drop-in upgrade for a vintage Fender Champ/Vibro Champ style circuit or low-wattage 1x12 extension cabinet where you want to tame harsh, ice-pick high frequencies.