▁United ▁States ▁under ▁its ▁own ▁company ▁name ▁and ▁have ▁been ▁well ▁accepted ▁by ▁piano ▁teachers ▁and ▁tun ers . ▁ ▁Other ▁instruments ▁ ▁Pear l ▁River ▁is ▁also ▁one ▁of ▁the ▁world ' s ▁largest ▁guitar ▁and ▁viol in ▁manufact ur ers , ▁and ▁is ▁a ▁primary ▁supp lier ▁for ▁the ▁popular ▁" First ▁Act " ▁brand ▁of ▁gu it ars ▁commonly ▁found ▁at ▁Target ▁stores ▁among ▁others . ▁ ▁The ▁company ▁also ▁s ells ▁drums , ▁br ass , ▁and ▁wood wind ▁instruments ▁intern ation ally . ▁In ▁the ▁People ' s ▁Republic ▁of ▁China , ▁they ▁produce ▁gu it ars ▁with ▁the ▁own ▁brand ▁name , ▁" K ap ok ▁Gu itar " ▁( 红 <0xE6> <0xA3> <0x89> ). ▁ ▁R it m ull er ▁ ▁Pear l ▁River ▁h ired ▁a ▁piano ▁designer ▁L oth ar ▁Thom ma ▁to ▁create ▁the ▁new ▁R it m ull er ▁lines . ▁Event ually ▁Thom ma ▁had ▁designed ▁or ▁helped ▁design ▁both ▁of ▁the ▁R it m ull er ▁series ▁of ▁pian os , ▁Performance ▁and ▁Prem ium . ▁ ▁The ▁company ▁says ▁that ▁the ▁L oth ar ▁Thom ma - des igned ▁R it m ull er ▁pian os ▁feature ▁European ▁scale ▁designs ▁and ▁use ▁high ▁end ▁European ▁components , ▁and ▁smaller , ▁slower ▁production ▁to ▁allow ▁more ▁hand - fin ishing ▁work . ▁Some ▁of ▁the ▁differences ▁between ▁Pear l ▁River ▁and ▁R it m ull er ▁include ▁the ▁Thom na ▁designed ▁lower ▁t ension ▁German ▁scales , ▁piano ▁felt ▁from