That translates into (almost) exactly a 1.0 decibel imbalance. It'll be quite audible, and some (myself included) will find it extremely annoying. Others are oblivious to channel imbalance until it's more severe.
Unfortunately - until you get into the big money cartridges - many models are spec'd by the manufacturer at no better than a 1.5 dB channel differential. Some models are spec'd at 1.0dB, and once you get into the high end, 0.5dB is more common. So your cart is almost certainly considered normal - especially since it was stated right on the spec sheet!
You could try to mitigate this by playing off other imbalances that may exist downstream. E.g. if you have an imbalance due to asymmetric room acoustics (and you don't mind swapping L/R). Or, you could have a custom 1.0dB attenuator built and place it between the weaker channel's phono -> preamp link. Or you could return/sell that cart and keep looking.
Unfortunately - until you get into the big money cartridges - many models are spec'd by the manufacturer at no better than a 1.5 dB channel differential. Some models are spec'd at 1.0dB, and once you get into the high end, 0.5dB is more common. So your cart is almost certainly considered normal - especially since it was stated right on the spec sheet!
You could try to mitigate this by playing off other imbalances that may exist downstream. E.g. if you have an imbalance due to asymmetric room acoustics (and you don't mind swapping L/R). Or, you could have a custom 1.0dB attenuator built and place it between the weaker channel's phono -> preamp link. Or you could return/sell that cart and keep looking.