Don't forget you can crank up the volume with the front knob!
Using various expansions with pass-through connectors on the 500 can be a major pain - around 50% of the possible combinations simple won't work (reliably). Combining the A570 with a DMA SCSI controller is almost certain to fail. The 500 is simply missing a bus controller which the 2000 does have.
As posted your only options are
- expanding the 570 with SCSI for HDD
- replacing it with SCSI controller + CDROM alltogether (much faster)
- adding an internal IDE controller (slow)
