Marantz LS-6 (mid-1960s)

Name: Marantz LS-6
Brand: Marantz

The Marantz LS-6 is a three-way acoustic suspension loudspeaker from the mid-1960s. It belongs to the company's Imperial series, Marantz's early entry into the speaker market. The Speaker Shop, a certified Marantz dealer, describes it as “a critically-acclaimed speaker from the mid-1960s” that remains popular with audiophiles and collectors, and calls its sound smooth and balanced. Enthusiast discussion on Audiokarma agrees. The Imperial series is called “criminally underrated” there, and the LS-6 itself is praised as “great speakers.”

The cabinet is walnut and houses a 10-inch woofer in an acoustic suspension enclosure. The “Brilliance” tweeter level control is the notable feature, and owners say it can be adjusted to taste. The LS-6 measures 21″ x 14″ x 11½″ and weighs 22 lbs (29 lbs shipping).

Documentation on this model is thin. The midrange and tweeter driver sizes are unrecorded in available sources. So are crossover frequency, power handling, sensitivity, and original selling price. Impedance is a real conflict. The Speaker Shop's spec sheet lists 8Ω, and the radiomuseum.org entry lists 4Ω. The record doesn't say which is correct.

Surviving units may need woofer surround refoaming, and owners mention that replacing the original crossover capacitors is a worthwhile maintenance step. The Imperial series rarely comes up for sale; one 2020 listing tracked a pair at $600, though it’s unclear whether that sale closed. This is a rare, underdocumented piece of Marantz’s 1960s speaker history.