Some Fender amps can be quite bassy on the low strings - that's why most guys with Deluxes or Twins have the bass control down on 2 or 3.
The Blues Deluxe is known for it though - it's especially bad with humbuckers, even with the bass control on 0. There are a few mods for them:
http://forum.metroamp.com/viewtopic.php?f=10&t=35915
BTW, Most guys see my Twin with the bass on 10 and go ???, but I play bright guitars, have Vox-style speakers fitted and often play bass parts at the same time. It's all relative.