Re: Does changing cabinet speakers effect Tone?
If you got
www.avatarspeakers.com , you can read about the different tones each speaker has. Very briefly, it's like this.
G12T-75 - 75w. Stock in Marshall cabs for years and years...in the basic 1960 A & B cabs. They have a tight low end, and tight crisp high range, and a somewhat scooped midrange. This is why Marshall puts them in cabs...Marshalls are mid heavy amps, and that kind of balances the speaker. Tonewise, think late 70's metal, 80's rock and metal...like that.
V30 - 60w. much smoother in the highs, slightly looser in the lows to my ears, which makes them sound slightly darker, but the mids are VERY present in this speaker. It's much smoother then most of the other Celestion speakers. Great for warming up a cold amp or cab.
G12H30 - 30w. Probably one of the biggest low ends in speakers. It's the J-Lo of speakers. Smooth highs, mids warmer than the G12T but not quite as pronounced as the V30. Great for some low end thump while still giving you nice highs and prominent mids.
Greenback - Lowest wattage (25w) speaker. Has an early breakup and a very "woody" sound for lack of a better term. These were standard in Marshall cabs for many, many years prior to the G12T's, and are still in some of the upper end and vintage series Marshall Cabs. These will really color your sound, but in a pleasing way. Billy Gibbons for one is a big user of them. Great sizzle.
There are a ton of other speakers out there, but these are the ones that the marjority are flavored like. None are better or worse, just different.
For the tone change you're asking for, I would combine one V30 and one G12-H. Open back cabs lose a lot of bass and treble frequencies out the back. The G12 will help give you back some of your low end, but in a good way.