DK - Changing cables is a good move and will help in soundstage mostly but will not fix your lack of bass. The CJ 2300 amp is rated 240 wpc @8ohms and is made specifically for tough loads ie Theil (see CJ website) Therefore i doubt your amp is the problem.
I believe the Meridian 506-20 is similar to sound quality to my Theta Miles cdp which is noted for its excellent bass response. BTW the Theta Miles resolved my bass problem. Also you should check reviews on Theta Miles & Meridian 506-20 to verify similarities. Theta might have been compared to the 508-20.
I am not familiar enough with the Theils to make a judgement except that they are power hungry, but your amp should be sufficient. Therefore for a sure thing add the subwoofer. The 508-24 might get you the bass you are looking for, but it's a gamble.
For the record, I too have equipment similar to yours, CJ MF-2200 & PFR pre, Theta Miles cdp Homegrown Silver Lace ic's, MIT T-2 speaker cable and Silverline Sonatas. There are times when I think about adding a subwoofer. The thought usually only occurs when I,m playing a thin sounding rock cd. Is this the same for you?
I believe the Meridian 506-20 is similar to sound quality to my Theta Miles cdp which is noted for its excellent bass response. BTW the Theta Miles resolved my bass problem. Also you should check reviews on Theta Miles & Meridian 506-20 to verify similarities. Theta might have been compared to the 508-20.
I am not familiar enough with the Theils to make a judgement except that they are power hungry, but your amp should be sufficient. Therefore for a sure thing add the subwoofer. The 508-24 might get you the bass you are looking for, but it's a gamble.
For the record, I too have equipment similar to yours, CJ MF-2200 & PFR pre, Theta Miles cdp Homegrown Silver Lace ic's, MIT T-2 speaker cable and Silverline Sonatas. There are times when I think about adding a subwoofer. The thought usually only occurs when I,m playing a thin sounding rock cd. Is this the same for you?