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Steve's back for one more episode before we head out, but we'll be posting special Yuletide episodes throughout the holiday so you can still get your 404 fix.

Our guest today is CNET's audio expert, Steve Guttenberg, and he brings a list of the most significant inventions of the early 20th century with him.

Wilson will probably be disappointed to see that the electric washing machine isn't included on that list, and neither are antibiotics like penicillin, so you'll have to tune into today's episode to hear the whole story; you might be surprised to hear about which invention changed Steve's life, for better or worse.

Steve also has plenty of suggestions for the top gifts to buy for the audiophiliacs in your life. You don't have to spend a lot of money to get top-quality sound from your devices, and Steve's list of gifts under $100 includes an affordable in-ear headphone from NOX, a pair of bookshelf speakers that can produce audiophile-quality sound for just $29/pair, and a small amplifier that'll add 15 watts of power to your music.

Also be sure to check out Steve's other list of audio devices for the more affluent gift-givers, and have a great holiday, everyone!