It was Phil Spector who in the late 1960s was a producer of music and invented the "wall of sound".
The "wall of sound", was a technique of applying layers of sounds, reverberations and echo over the original track. The overall effect was, as described by a contemporary of Spector, as "bathing in
sound".

The Beach Boys song, Good Vibrations is a good example of the "wall of sound" technique.
Why, you may ask, do I begin a review of an Australian red with a primer on Phil Spector's "wall of sound"? Well, because they are so very similar.
Where Spector layered sound, Penfolds layers flavor, depth and intensity.
My Impressions: Inky. Bold. Full-flavored. Mouth-filling. Plums and spice on the nose, mildly tannic, with a (regrettably) short finish. The addition of the Cabernet Sauvignon pumps up the acidity, and rounds-out what would otherwise have been just another flabby Australian Shiraz. Wonderful.
I paid $9.99 for this bottle at my local grocery store and it compares very favorably with the teeth-staining yumminess which I have come to appreciate in the more expensive Shiraz-based Yalumba blends.
At the price and the enjoyment: this wine is a steal. Buy it and drink it now.
~ Terry