Craig Campanaro van Sharky Extreme heeft een review geschreven van de Diamond Rio 500 die 64MB aan ruimte biedt voor je MP3's. Hieronder wat meer info over zijn geluidskwaliteit:
After playing music from every possible genre over several hours we're prepared to render judgement on the Rio 500, and for the most part it's very favorable.
First off, we requested that a manually controlled equalizer be put on the next-generation Rio when we reviewed the first PMP300 player in 1998. The PMP300 offered just a few "pre-set" EQ settings which were mediocre at best, and we wanted full control over the settings ourselves in order to best customize the music playback.
The Rio 500 offers a compromise: single manually adjustable Treble and Bass controls that the unit will remember even when powered down.
This is a good start in our opinion, but we'd also like to see a third Midrange control added to allow near-complete manipulation.
RCA's new MP3 player, the Lyra, offers a five-band manually controllable equalizer, and in comparison to the Rio 500's limited two-band equalizer, it sounds superior.
We ultimately recommend the Rio 500 over the Lyra for a variety of other negatives that the Lyra has, but in terms of sound reproduction the Lyra does hold a slight edge over the Rio 500 in our opinion.