Ted,
Where are sending the output from the LS26 to? If you are sending it to your Mcintosh pre/proc are you selecting the correct setting on the Mcintosh?
If you can, hook up the CD player direct to the LS26, then take the output from the LS26 direct to the amp for the front (2) channels, thus bypassing the Mcintosh pre/proc completely. Not sure if your cables are long enough, but this would isolate the LS26 to just a (2) channel setup. If this works, then it's a setting on the Mcintosh that is wrong.
Where are sending the output from the LS26 to? If you are sending it to your Mcintosh pre/proc are you selecting the correct setting on the Mcintosh?
If you can, hook up the CD player direct to the LS26, then take the output from the LS26 direct to the amp for the front (2) channels, thus bypassing the Mcintosh pre/proc completely. Not sure if your cables are long enough, but this would isolate the LS26 to just a (2) channel setup. If this works, then it's a setting on the Mcintosh that is wrong.