The system had 2 KLH-130watt speakers, 1 75-watt sup with a 25watt amp on the back and 3 old wall speakers that i found around the house. This altogether could shake my room and work fine at 100% volume (and man was it loud even to loud for me : - ) lol ) but then i replaced 2 of the wall speakers with the Kliosch B2 bookshelf speakers and now it stops giving off sound at like 30% : - (