Re: Creamback 65 vs scumback m75?
How would you describe the scumbacks?
Scumbacks and classic style Celestions are necessarily the same things.
The Scumback "M" and "H" speakers are the same as Celestion "M" and "H" speakers. The cone that Scumback uses is IMO closer to the Pulsonic formula than the Celestion (Kurt Mueller?), but the voice coil, magnet, frame and so on are pretty much the same.
Celestion has the G12 speaker that is commonly called a "greenback" because of the color of the magnet cover. However, that cover came in several colors even though the speaker was the same.
The current modern "creamback" is the same thing as a "greenback," but can handle more wattage (25w v. 65w)
Sticking to just the current models, here are your choices;
You can get the G12 design in both a medium (M) or heavy (H) magnet. You can combine that with either a 75Hz or 55Hz resonance frequency, Fs.
Once you know that, you can decide on a wattage handling.
The current choices for the G12 are 20, 25, 65 and 150-watt versions.
The G12 "greenback" has a 25w rating with either a medium (M) or heavy (H) magnet and can be had with either a 55Hz or 75Hz (Heritage and EVH models are based around a more vintage "correct" design, and therefore have a 20w rating.)
The G12 "creamback" has 65w rating with only a medium magnet and 75Hz
The G12 "redback" has a 150w rating with only a heavy magnet and 75Hz
You still with me?
Scumback speaker models are offered around the same classic design but with more of a vintage sound.
The Scumback M Series is compared to the Celestion G12M. (You can choose the power rating and Hz)
The Scumback H Series is compared to the Celestion G12H
Scumback has further options of cone type, dust cap, and doping, but skip all that for now.
All that boils down to this. You can get the Celestion speaker for around $50 less than the equivalent Scumback, but the Scumback will have a more vintage "correct" sound. I would submit that most people would not know the difference.
Jim Seavall (Scumback) is a great guy with an in-depth knowledge of Celestion speaker design and history. I not only have several of his speakers but also have had Jim re-cone my blown out Celestions.