Speaker Cross Reference
For awhile now people have been asking what my speakers are similar to in the Celestion line. For the most part, the answer is none. My speakers are aged/built and tonally replicate the old Pre Rola Celestion speakers from the late 60's to mid 70's, with some variations that Celestion never built, just to satisfy the needs for particular tones sought by various players. They are built to sound old right out of the box with vintage/correct doping techniques/styles and break in with much less hours than the original models from the 60's due to the manufacturing techniques and break in procedures done during the manufacturing process.
With that said, here are the closest comparisons to Celestion models for those who need a cross reference. All model names used are copyright or trade names of Marshall, Celestion, Vox, Pulsonic and Southbay Ampworks. These names are used for comparison/informational purposes only in an aid to better educate those trying to compare speaker models effectively.
12" MODELS
M75-8 or -16 --> G12M T1221 Pre Rola 75hz (bass response) lead cone, using the 102 003 Pulsonic cone. These were the most popular speakers made in the old days, and were commonly referred to as "Greenbacks". 25 watts power handling. These speakers had a 35 oz magnet that produced more midrange than low end or high end, resulting in the pronounced mid range hump that sounded dark to many players. Marshall used these extensively in their stack cabs, although the G12H30 model was also very popular.
M75-HP-LHDC --> G12-65 This is a high powered Greenback, with 65 watts of power handling, and a lowered bass response speaker. This is due to the large dust cap used to tone down the high end slightly, which also beefed up the low end slightly. This speaker was made from 78-82 and had over 40 variations in it's short lifespan, according to reputable sources.
M55 --> G12M T1511 Pre Rola 55hz (bass response) bass cone, using the 102 014 Pulsonic cone. 25 watts power handling. These speakers were used in the early Bass logo cabs and up through the early 70's in 100 logo cabs as well.
H75 -8 or -16 --> G12H30 T1217 Pre Rola 75hz (bass response) lead cone, using the 102 003 Pulsonic cone. These speakers had a 50 oz magnet which made them louder, produce more bass and treble, with a flatter midrange response. These came out in mid 66, following the mid 65 introduction of the G12M. They appeared in the Marshall 100 logo cabs most often, and were offered in the lead cone version, and the bass cone version.
H55-8 or -16 --> G12H30 T1281 or T1534 Pre Rola 5hz (bass response) bass cone, using the 102 014 Pulsonic cone. These speakers had a 50 oz magnet which made them louder, produce more bass and treble, with a flatter midrange response. These came out in mid 66, following the mid 65 introduction of the G12M. They appeared in the Marshall 100 & Bass logo cabs most often, and were used by Hendrix later in his career after they were introduced.
H75-LHDC (30 watt) --> No Celestion equivalent. This is an H75 with a tiny bit less treble and a tiny bit more bass, but with more volume and punch than a G12-65 or M75-HP-LHDC, due to the 50 oz heavy magnet. Used for higher gain tones, and the Dumble sound quite effectively.
M75-LHDC (25 watt) --> No Celestion equivalent, but basically a lower power G12-65 with the Pre Rola tone. Great for higher gain with a bit less bass & treble than the H75-LHDC, and reduced volume.
ALNICO MODEL
Scumnico 12" --> Vox / Celestion Silver Alnico with 102 003 cone.
The Scumnico is an Alnico with the 40 oz magnet but with a neodymium tip to improve efficiency and boost bass response and high end. While not as trebly as an Alnico Blue, it provides similar volume, more bass, and more mids, while retaining the upper mid chime and swirl that makes Alnico magnet speakers unique. Available in 15, 30, 65 & 100 watt power handling.
10" MODELS
SA10M75-8 or 16 --> 7442 Celestion 10" used in the 8x10 cabs. This is a midrange based speaker, with some great low mids and low end. 30 or 75 watt power handling.
SA10H75-8 or 16 --> 9384 Celestion 10" Greenback with a heavier magnet which was used in the BluesBreaker combo amps from Marshall. These speakers put out much more volume than a standard 10" speaker, with more bass, flatter mids, and more treble. 30 or 75 watt power handling.