inputs.text: simplyvibe svs350plus - bought speakers month ago replace original ilove speakers mp3 player speakers quit working not loud enough far no significant complaints simplyvibe speakers sound quality crisp smooth even volume maxed not tried blasting anything harsh metallica etc suppose possible push thehem far far no problehems design slick practical easy use never really paid much attention instructions figured jiffy convient charge replaceable lithium battery neat little carrying case cables included could change anything product would make speakers bit louder volume great especially indoors bike rides use thehem would love blast thehem like boombox boombox volume would awesome give battery slightly longer life good apprx 4 hrs not great use thehem day unless feel like carrying spare battery possible definately worth money overall quality great small convenient size easy use quality well hope helps