Summary: This Sony mp3 player cassette adapter works and sounds good. Don't be fooled by the "for all Discman® Players by Sony" reference; this works just fine with iPods or any device with mini-plug headphone jacks. I tried 3 (!) other brands from 3 other stores before I got this one and none of them sounded right. One was distorted, one had low output and one had no bass.
Summary: My 2004 vehicle has a cassette deck. I needed a way to connect my iPod. I tried an FM transmitter, but the sound quality was poor. Then, I bought a cheap cassette adapter from [...], but it rattled and made distracting noises. So, I Googled "best cassette adapter" and this Sony CPA-9C was the highest rated. I've had it for a few weeks now and it works perfectly.
Summary: I connect this with my iPod to use in my cars cassette player, and I seriously cant tell the difference between a CD and the iPod with adapter. Incredible quality! (And I am a music producer!) Great product! 5 Stars!