The year codes started over, with 1968 beginning at A. I am trying to figure out what year the speakers were made. We listen, we learn and if we misstep we are not afraid to do the right thing. G12H Family The G12H in its most commonly found form is the 30-watt cousin of the G12M. Too heavy so I sold it to finance a 62 Fender Deluxe.
For example, the serial number 961002334 would tell us that this amp was made in 1996 96 , production number 10023, and it was made during the 34th 34 week of that year. From 1986 onwards a two digit number is used instead. Worn or mismatched speakers in wattage or impedance ohms are one thing, but different speaker designs also provide dramatic changes in tone and response for guitarists. This is an important stamp to look for to. G12T-75 This model is the most common Celestion speaker of all.
Slightly different voicings, but both really nice. The first Marshall amps were made in England starting in 1962. It may have been some time before the part was installed at the factory, but it still provides a good approximation of when the gear was made. Heritage G12H 55hz The Heritage G12H 55hz a reproduction of the 1968-1973 G12H 55hz is a 30w speaker with an efficiency of 100db and is offered in 8ohms and 16ohms. These speakers felt like nothing. They are both horrible speakers. According to this site the code format is Month, Year, Day, which means they would have been made on July 2, 1968.
Following the Greenback and other colour plastic backs Celestion quit using the mid letter. Alnico speakers are available with or without an end bell purchased separately. Anyone else here use these bass G12-65's? I suppose they assumed that the wattage would indicate the weight of magnet, I guess. I'd get the genuine Marshall if I were you. The end result is that it is a quieter speaker at the same comparative output setting on an amp than others including the G12H or Vintage 30. The bass version was found on the Marshall 1982A and 1982B cabs from around 1978 onwards. For such a bastardized exterior, stripped, painted, replacement grill this old box saw little monkey business inside.
Keep in mind that no reliable serial number information exists for pre-1969 Marshall amps, so if your amp doesn't have a number matching one of the formats below, it is likely pre-1969 and identifiable by features rather than serial number. It will really stand out amongst my other 2 stacks of 70-75 war weary marshall cabs. . The frame codes are almost completely unreadable. This seems silly, as we're talking about electronic parts not eggs. They are making them in China nowdays.
It's worth mentioning since a lot of people rely on pot dates. Or is it a 15 Ohm 20w label with a little '25w' sticker over the top? These became obsolete with good Alnico magnets and weren't used much past the 1940s. These are still found on stickers with a bar code on the back of the amp. Be careful: they look exactly the same as the 1960 cabs! I've checked on Celestion's site and my History of Marshall book but these codes don't jive with any of their lists. In either case, the remaining 2 digits are the week of manufacture 01 to 52. The source-date code will signify the earliest possible date that the instrument or amp could have been made.
T1359 G12L 15 Ohm as T1358 but 15 Ohm T1363 G12H 15 Ohm fitted standard G12M cone assy for organ use standard colour — Also Heritage G12H — 75hz T1364 G12H 8 Ohm as T1363 but 8 Ohm — Also Heritage G12H — 75hz T1365 G12S 15 Ohm standard cone assy as G12M. A speaker could turn out to be magical or pure crap being produced in the same day. My old plexis look black to me. It has an efficiency of 100db and is offered in 8ohms and 16ohms. It just means it will deal with lower frequencies better. The reviews in the internet are hugely positive too.
Not Feb 1965 or Feb 1977. My preference is to use only vintage speakers in all of my cabinets and, to me, it makes a world of difference in the type of tone I am looking for! Perhaps you could ask on some forums like thegearpage or something. This speaker type was registered in the Celestion log book on 8th Sept. The truth is in the… cone! Hoping it was this vintage to match my plexis. And remember, even the dates indicated by the pots aren't that exact. So, why is it so special? Celestion has now two versions of the speaker, one made in England, one made in China.
The power handling will only tell how much wattage it can take safely without blowing. As many cabinets did not have official serial numbers before 1992, this can be especially helpful in dating earlier specimens. So i have the chance to compare them all directly. Stackpole for example converted from three to four digit date codes in late 1959. The first models introduced were the G12M 20w and the G12H 30w 55hz. Present day G12T-75s inside a Marshall 1960B cab: scooped mids of doom! Regardless of these factors, while a G12M 25 watter from these two eras for example will sound different, they still inherently contain the basic characteristic tones and voicing of a G12M. The additional date codes for this era are below.
A simple typo but it can be very misleading. The speakers look the same except for the labels. The year codes changed after this, so using other pieces of evidence to make sure you have pre-1968 speakers is important. That said, reducing the presence and treble controls can often be an effective aid to smoothing out the tone of this speaker. And this is an area that is all too often neglected. T1304 G12M 8 Ohm sprayed poly grey jennings T1313 G12L 12 Ohm standard colour. The Gear Page is run by musicians for musicians.