Rotary 914, you need to tell us some more so that we can help you.
Are you happy with how your system sounds using another source - e.g. cd or tuner?
Have you experimented with speaker positions? Moving them a few feet further towards or away from your listening position can make a huge difference in sound. Also, I've found that having dissimilar materials on opposite surfaces helps i.e. a bare wall behind the speakers with a bookcase full of books on the opposite side of the room.
What happens to the sound when you clap your hands in differnt places in the room? If there's a pronounced echo then you would need to dampen it down with more soft, absorbent materials.
If your turntable sounded good in your previous room then it's unlikely that you will get that sound back in the new one just by tweaking the set up of the arm and cart.
Is the new room size significantly larger or smaller than before?
From what you have said, I don't think your problem is acoustic isolation but you could check by putting the cart on a record with the platter stationary, turn the amp up to a loud listening level and then gently tap the floor and the concrete block to hear what happens.
Are you happy with how your system sounds using another source - e.g. cd or tuner?
Have you experimented with speaker positions? Moving them a few feet further towards or away from your listening position can make a huge difference in sound. Also, I've found that having dissimilar materials on opposite surfaces helps i.e. a bare wall behind the speakers with a bookcase full of books on the opposite side of the room.
What happens to the sound when you clap your hands in differnt places in the room? If there's a pronounced echo then you would need to dampen it down with more soft, absorbent materials.
If your turntable sounded good in your previous room then it's unlikely that you will get that sound back in the new one just by tweaking the set up of the arm and cart.
Is the new room size significantly larger or smaller than before?
From what you have said, I don't think your problem is acoustic isolation but you could check by putting the cart on a record with the platter stationary, turn the amp up to a loud listening level and then gently tap the floor and the concrete block to hear what happens.