To friggy. Get that Marantz into whatever is the equivalent of DIRECT or PURE AUDIO mode. Slap a CD in the player and listen to "all" your drivers. If the B&Ws have dual terminals and jumpers. Make sure "everything" is screwed down tight and making "contact".
If you play a CD in the "Direct" mode it will bypass all the processing and we should hear what is there only--unaffected by any audio "settings".