I've got the Soundpack in mine and it has 10 speakers and an amplifier under the passenger seat.
I've been driving around in an R32 for 5 days last week with the standard RCD300 and the sound was shocking (of the RCD 300, the V6 was glorious). The RCD500 and Soundpack isn't all that but it's a lot better!
I think if you have the Soundpack you can't replace the head unit so easily because no one seems to do an adaptor between the headunit and loom for the amplified system (but someone may correct me on that).
I've been driving around in an R32 for 5 days last week with the standard RCD300 and the sound was shocking (of the RCD 300, the V6 was glorious). The RCD500 and Soundpack isn't all that but it's a lot better!
I think if you have the Soundpack you can't replace the head unit so easily because no one seems to do an adaptor between the headunit and loom for the amplified system (but someone may correct me on that).