Mega Rare only legendary DCM Transmition line Time Window Speakers 3 from America from the golden era 1970s Jaw Dropping Performance 200W only Set in Ireland

Really Rare especially in this condition

The sound is exceptional

These are nearly 40 inches Tall

The first to see and listen will take them


■■■■No Time Wasters or offers please■■■■

You would have to spend thousands to get anything close to these simple

You won’t find another set

DCM Time Window speakers are legendary, classic hifi floor-standing loudspeakers produced by DCM Corporation in Ann Arbor, Michigan, starting in the mid-1970s. Celebrated for their exceptional imaging, expansive soundstage, and time-coherent crossovers, they deliver a uniquely realistic, holographic audio experience. Their distinct triangular/cylindrical cabinet design—often compared to a cat scratching post—features angled front baffles wrapped in a distinctive foam knit sock. [1, 2, 3, 4, 5, 6]

Specifications overview

The core specifications for the widely collected Time Window 1 / 1A models include:

Frequency Range: 25 Hz to 18 kHz

Sensitivity: 89 dB/watt at one meter

Impedance: 5 ohms minimum, 6–8 ohms nominal

Dispersion: 180 degrees horizontal, 60 degrees vertical

Power Requirements: 10 Watts minimum per channel, up to 200 Watts maximum

Dimensions: 36" H x 14.75" W x 11.75" D

Weight: 32 pounds each [1, 2]

Key models and iterations

Original Time Window (1): Features twin 1" Philips coated silk dome tweeters and two 6.5" CTS paper-cone woofers. The earliest models featured MDF endcaps glued into place. [1, 2]

Time Window 1A: An upgraded, highly common version that stepped up to premium Vifa ferrofluid-cooled tweeters. It features solid oak or walnut endplates bolted into place. [, 4]

Time Window 3: A larger, heavy-duty evolution with upgraded drivers and an intricate folded transmission-line cabinet. It includes physical switches to adjust dispersion controls for fine-tuning room acoustics. [1]

Time Window Seven: The rare, ultra-premium, final iteration of the family line, highly coveted by vintage collectors. [1]

Acoustic engineering & design traits

Acoustic Time-Alignment: The crossover network slightly delays high frequencies

Acoustic engineering & design traits

Acoustic Time-Alignment: The crossover network slightly delays high frequencies so sound waves from both the tweeters and woofers reach the listener's ears at precisely the exact same millisecond.

Quasi-Transmission Line: “The cabinets themselves contributed toward bass tuning, as well as the long, twisted cardboard tubes inside the cabinet.” as noted by Holt Hill Audio. This innovative use of internal cardboard cylinders allows deep, robust bass response without massive enclosures