ive just bought a r90 the original amp as described in manual has been replaced with a mk iv amp by rainbow manufacturing, my problem is the left speaker has blown the two midrange are missing,i want to replace the midrange and the blown speaker ,the two woofers are now wired to the phono on the new amp question ,how do i wire the midrange speakers and do i wire in the two coils next to where they go, one more thing the two woofers have had the capacitors cut ,any ideas why,should i connect back up ?