Efficient Acoustic Enhancement of End pins and receptacles for stringed musical instruments and the like using customized filler materials

An acoustic device, said acoustic device configured to be-used with a musical instrument,

• said acoustic device having at least one shaft containing filler material;
• said filler material is selected from the group consisting of shots, pellets, powders, magnetic material and a combination thereof;
• and wherein said acoustic device having a mechanism for removably sealing said at least one shaft configured to accommodate replacing said filler material installed in said at least one shaft with a different filler material;
• said acoustic device being further comprised of
• a rod, said rod having a rod first end and a rod second end;
• a first shaft positioned along longitudinal direction of said rod, said first shaft extending through interior of said rod, said first shaft configured to being filled with said filler material;
• said rod being configured to removably seal to said first shaft after said filler material is inserted into said first shaft;
• a stopper;
• said stopper having a stopper first end and a stopper second end;
• said stopper being configured to attach to said rod at said rod second end, said rod being configured to attach to said musical instrument at said rod first end,
• said acoustic device being further comprised of a pointed tip, said pointed tip attachable to said stopper at said stopper second end, said pointed tip comprised of a tip body and a tip point;
• said acoustic device additionally has a stem, said stem having a stem first end and a stem second end, said stem attachable to said rod first end, said stem has a second shaft starting at said stem first end and terminating prior to said stem second end;
• said second shaft being configured to contain said filler material;
• said stem second end being matched to a cavity located on said rod first end;
• said stem second end being removably attachable to said cavity.