Saw a friend today for a catch up.
His new set up is in place and working well.
He has an issue with Beatles records - only Beatles records.
Some of the tracks are noticeably quiet. Enough to be driving him a bit mad to want to know why. Anything obvious?
I can get more about which and what tracks, but he has no problems with everything else!
Hifi has good taste and wants to spare him the unpleasantness of hearing them? 
Has he perhaps got a MM cart plugged in to a MC input on a phono stage leading to clipping on some heavily compressed tracks?
It can’t be the other way around or absolutely everything would be equally quiet.
Shit pressings?
New AT deck (with mm on it from new) with built in phono straight into integrated.
I suspect it has to be a groove thing, or maybe his tracking force is out?
It’s specific tracks, only on Beatles LPs.
Cheapo Represses? or is he describing Mono?
Could be mono and playing out of phase which would sound sucked out. Check cabling or phase inverting kit which is less common but not impossible.
All originals from the time.
I did consider mono but not sure what effect they have on the sound as it’s an area as new to me as him.
I will get him to check the exact vinyl and then see if it’s that. He just said its the same tracks every time and they are way quieter by far than the rest of the pressing.
The weird bit is all his other records (mainly of their time and not represses) are fine.
While the mono / out of phase thing sounds likeliest, no chance he’s plugged the amplified signal from the deck into a built-in phono stage in the integrated? Really should just sound fucking terrible on everything though…
If it’s only certain tracks much of the above wouldn’t apply (it would all be OK or all shit all the time)
Groove wear / condition is a possibility (… Thing is if he is inexperienced he might say something sounds good when it’s dire - currently we are in dark stabbing territory )
Makes sense, tho’ I guess if the cart is badly aligned it can struggle to work properly across certain sectors of the record surface more than others?
I think you are right.
If this wasn’t obvious to someone here straight away it warrants a little more in the way of details, and some specifics of which lps and which tracks.
For now I told him to get a tracking gauge and not rely on the dial numbers.
Appreciate the replies so far.
Yes, mistracking at certain points on the record due to poor alignment / tracking force / bias could conjure this issue but that would be the case on all records not just the Beatles.
Perhaps the other records are prog rock and so he’s not noticing because he’s slipping into a coma during an 8 hour hurdy-gurdy solo?
Rather annoyingly he has a pretty superb collection of all the original Pixies, Smiths, JAMC and stuff I loved but got on cd or cassette. His source material isn’t the issue in general.
He’s now doing it justice with some better kit. Still very much starter stuff but a step up from the basic thirty quid cart plug in and cheap deck he had.
Try the record on your kit, does it do the same thing? Assume he has fiddled with set up and no change so
Likely to be the records in an Occam’s razor kind of way
Could it be previous owner of the vinyl loved the specific tracks and played them to death with a dodgy set up ruining the record