The past century has seen significant technological advancements in the home audio industry. Here is a brief look at the changes over the years.
Turntable (Around 1920)

Radio (Around 1930)

Hi-Fidelity Receivers (Around 1958)

8-Track Home Deck (Around 1966)

Component Stereo (Between 1960s and 1980s)

Cassette Deck (Between 1970s and 1990s)

Boombox (About 1980)

CD Stereo Player (Around 1982)

Super Audio CD Player (About 1999)

Wireless Speakers (Mid 2000s)

Whole Home Audio Systems (Present)

