Sorry to Gunsfreddy2003 for my slow reply to his question regarding the differences between the Redhead & the Super Redhead.
The main differences is that the upgraded power handling & rating of the 2 x10 drivers that were used in them.
Internal cooling fan, redesigned front & rear bracing panels, mute switch for the xlr output & front porting in the speaker sections.
Regarding the Headlite & Amplite, they came into play once Fender had taken over Swr & I guess were their attempts at going lightweight & trying to get into
a similar market of the Markbass & the Genz Benz range of compact sized class D amps & which were proving very popular at the time.
The Headlite's were rated at 400w with a tube preamp, weighed in at approx 4lbs, had their well known aural enhancer kept in & had speakon jack outputs all housed in a half rack sized unit & came in a handy padded accessory back big enough to carry unit itself, the optional matching poweramp - the "Amplite", the optional 2 button footswitch & cables. The Amplite was also rated at 400w again with a class D amplifier built into it. I personally found the sound a little bit thinner than my Sm400s & was offered a fantastic deal when I purchased both together, so that's what I did. The only downside is that if using these live is to make sure that you have fully tweaked you setting, as seeing & trying to make any adjustments is truly very difficult as the buttons are very small & close together & the writing on the front panels is very small too.
Hope that this gives you an insight into the Headlite & the Amplite.