A friend sent me a Sound Improvement Disc for my cd player. There was an improvement when using the Disc but not a great one. Out of laziness I stopped using the disc when playing cd's. Recently with my upgraded int. amp and speakers I realized that now most of the electronic non musical sounds were from the cd player. I thought about the SID and decided to put it to use.

Let me say I am amazed. My cd player does not sound like the same player. All the electronic grunge is gone. The laser must be tracking better or the error correction system is working less. Imaging is more precise, vocals are pure and some cd's have greater depth. Smooth but detailed highs without any sense of fatigue while listening. The SID has improved the performance of the CD5001.

In the past when I tried the disc I think the int. amp and speakers were a limiting factor to the quality of the sound. Now that they have been improved I was able to hear the great improvement of the SID.