hello I own a Phil jones suitcase with the extension cab. I play a fender jazz deluxe. The amp sounds great in that it projects the sound of the bass. But the sound does lack a warmth. But when I play effects through it, the lack of warmth becomes more apparent. Particularly with dirt pedals. Dirt pedals sound too harsh. I've tried to insert the pedals via the input as well as via the fx loop. It doesn't seem to warm up. So I grabbed my Ampeg SVP pro and put it into the effects loop of the Phil jones. Tubes really warm up the sound. This configuration isn't a viable option because my SVP pro is noisey (yes I replaced all the tubes). Do other Phil jones owners feel the need to warm up the sound? How do you do it?