Ric 4001 thru BL 600 head

[Bagpiper]

I'm new here, so please forgive any forum faux pas.

I'm playing a Ric 4001 and a Fender Jazz (Geddy sig) thru a GK BL600 head with a GK neo 2x10 and a GK(standard) 1x15 cab set up.

I'm not getting that killer Ric sound through this rig. The bass sounds awesome thru my Fender AmpliTude program and headphones on my computer though.

The GK sound is a bit weak and I'm not really impressed with the Neo 2x10 cabinet right now.

Am I just not dialing the head in correctly or is the GK rig not a good set up for classic Ric tone (talking old Yes and Rush)?

Thanks in advance.