MC601 power output

More than 3db?  Not unusual for big amps to have quite a bit of difference. Is it audible? 

They do have gain controls to compensate for that don't they?

Like Russ69 said is there a audible difference? I have McIntosh 462 and I noticed a difference on the left channel turned out to be a faulty cable and it showed on the meter,so I guess you could say it was a power issue to.

No gain controls on MC601.

Not an audible difference but a visual one. The meters.

Run a mono signal to both amps and they should read the same.  If they don’t, the meter may need calibrating.  We’re the monoblocks purchased new or used?

Make sure to switch both to balance XLR or RCA inputs 

there’s a switch buttons at the back 

Tried all that stuff. Still an issue.

Will take them in and get them calibrated.

Thanks for all the replies,

When you changed inputs was it same channel or same amp putting out less power?

Same amp. Going in for calibration. No difference in sound. And the meter on the  amp showing higher power output did not go to zero at rest.