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Hartke LH1000 & Ampeg SVT 7 PRO

Ok guys, I know this is probably all over TB but I've been looking & can't seem to find it. My pf500 just died on me, the board was bad:/ It was a nice head but now I'm looking at something with a little more oomph(sp?). I'm leaning towards the SVT 7 pro, does anyone have this to tell me how tubey it sounds? Also, will someone please tell me what a tone shelving eq is?? In terms of the LH1000. Again, sorry for beating this topic to death
 
Shelving means that whatever frequency the tone control is set at,that that frequency and everything above or below it is boosted or cut also.It isn't a center frequency. Example, a bass frequency set at 50 hz,everything 50 and below gets affected. Same for treble.
 
I have a pf500 and a pro7. They sound similar to me but the pro7 is a little warmer sounding. I love the pf500 but love the pro7 even more. Even through an 8 ohm 410 cab the pro7 has more power than i will ever use. If you liked your pf500 you will love the pro7.
 
The 7 Pro and PF500 have similar preamps but the 7 Pro has a tube preamp and it has some more oomph. Definitely a step closer to tubiness than the PF500, which sounds pretty tubey to me as well.
 
The LH1000 uses a "Fender-style" tone stack, meaning that a neutral or "flat" landscape is accomplished with the treble & bass settings about 9/10 o'clock and the mid pot "full on" . . .
Then, you get to scoop the mids from there, if you're so inclined, otherwise there's a boosting of lows/highs to your taste - active bass EQ's can play a fun role, as well . . .
Not sure how passives interact . . .
Anyway, there's a lot more flexibility with tone in an LH1000 (or LH500) than is apparent at first glance . . . :p