Looks like a great system!
While I have no specific suggestions regarding a $2K upgrade, I would recommend that you contact Wisdom Audio and ask them what the apparently unspecified input impedance of the SCS sub is. Powered subs commonly have relatively low input impedances, and like many ARC preamps your LS-25 (which I assume is what you are driving the sub with) has a recommended minimum load impedance of 20K.
Also, as can be seen in the schematic for the LS-25 at arcdb.ws, its two XLR outputs are wired directly together, and its two RCA outputs are wired directly together and also to pin 2 of the XLR connectors. Therefore if the input impedance of the sub is particularly low it could be having adverse sonic effects on the signals received by the main speakers as well as by the sub.
Regards,
-- Al
While I have no specific suggestions regarding a $2K upgrade, I would recommend that you contact Wisdom Audio and ask them what the apparently unspecified input impedance of the SCS sub is. Powered subs commonly have relatively low input impedances, and like many ARC preamps your LS-25 (which I assume is what you are driving the sub with) has a recommended minimum load impedance of 20K.
Also, as can be seen in the schematic for the LS-25 at arcdb.ws, its two XLR outputs are wired directly together, and its two RCA outputs are wired directly together and also to pin 2 of the XLR connectors. Therefore if the input impedance of the sub is particularly low it could be having adverse sonic effects on the signals received by the main speakers as well as by the sub.
Regards,
-- Al