Sound — 9
First off, I would like to say this album's music is written very well. Many guitar layers add to the listening experience. The acoustic sound is great, but the electric sound can leave a little to be desired. The bass sounds good, yet can drift in and out of the mix. The bass playing isn't truly amazing either but it gets the job done. I would have to say the same thing about the drums; they aren't flashy but do their job wonderfully. The supportive rhythm section adds to Zeppelin's guitar centered sound.
Lyrics — 10
I think the lyrics on this album are top notch. They tell a story with a hint of mysticism. Plant (which wrote a good amount of the lyrics along with Paige) is a great vocalist. On the more bluesy songs, he can change his voice to more of a moan, while on other songs, his voice is strong and powerful. This adds greatly to the emotion in the song. I love how the guitar accents the vocals every once in a while. The guest singer that appears on one of the songs is good also. No weak points in this section at all.
Overall Impression — 10
I would consider this album one of the best of the '70s. Of course it includes the legendary classic, "Stairway to Heaven." This is not the only reason to buy the album, however. "Battle of Evermore," "Rock and Roll," and "When the Levee Breaks" are all great songs. My personal favorite would have to be "Going to California." A ton of emotion in that song. The weak point to me would have to be "Four Sticks." There's just something I don't like about that song. Zeppelin IV is defiantly a must have in any type of music lovers collection, for it has so much variety. One second you are listening to a heavy song, then a very emotional acoustic tune, and then a true blues masterpiece. That's what makes it so good.