If you are using the MX132 only for 2 channel listening, I believe you will hear significant improvement in sound quality matching a dedicated McIntosh preamp with your MC602. I tried a MX136 against a C2300 and it wasn't even close for 2 channel.
mcintosh home theater pre-amp tuners.
I have a McIntosh mx132 home theater pre-amp tuner. it's list price was 7k. I see on ebay that many of these, mx130, mx135 and so on doesn't retain their value. is there a reason for this and where doe's mine stand?