Buy or stay with?


I'm playing 2 Yamaha m40 amplifiers I have cerwin xls28  4 of them . I was thinking about buying newer amps like bryston 4bst amp Yamaha MX 800 it seems that these speakers are asking for straight power if my amps are not tuned up the woofers don't move what should I do or any ideas 

albertballew

Ty everyone I play these at 4 ohms and they sound amazing from Chicago to lamb of God . But I have had these 7 years before these I was listening to 6 vs series cerwin 12 and 15 played for 35 years  Bass notes not problem it's foot pedal sounds I thought these would  punch faster response with xls28 so far the mids highs are great but double foot pedals what I need ty for all the responses