I would, like a few others, suggest a speaker upgrade but not any of those suggested. You need to find speakers that are voiced for your amplifier i.e. tube friendly speakers.
I’d start off by speaking to the folks at McIntosh and hear what they recommend, or see if there is a McIntosh owners group and speak to them.
I’d start off by speaking to the folks at McIntosh and hear what they recommend, or see if there is a McIntosh owners group and speak to them.