toyotaprevia1995

Can you hear the bass easily?Does anyone have any other ideas?Help me please

I don't know if it is normal for all LS430 models or not.My car got 11 Mark Levinson speakers but its quality doesn't seem to be appropriate,I've turned the bass to the max but I still could not hear the bass clearly until the volume reached to 30, but it is so loud at that line.I have also compared to the IS250 without Mark Levinson,the IS was better for sure.Any ideas for my sound system?Does it have any problems?Please help me.Thank you very much