Dating rola celestion speakers
Pushing the speaker too far will result in over-compression and lack of definition.The trick is to play with the bass and volume control of the amplifier to careful find the right balance of compression.The 6 digit code indicates what manufacturer made the speaker and when it was made. Here is a list of some of the speaker manufacturers and their EIA codes: So, the speaker in the image above would have been made by Jensen (220) during the 27th week of 1951 or 1961.The year is confusing because it is only a single digit.This will be a general guide because even within each speaker type listed, there are various changes that have been made throughout its life.
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.
Throughout the1970’s, the color of the magnet cover was changed (beige, black, etc.), but the basic ingredients, other than a few variances in the cone, largely remained the same, until the late ‘70s, circa ’78-’79, when new materials in the cone diaphragm were explored.
The tone of the G12M is the foundation for much of the greatest rock and blues music ever recorded. And what does one sound like "in real life" away from the world of recording studios that can alter, shape and compress the sound through the mixing board, e.q., and other processors?
The G12M to this writer’s ears is a speaker that changes character and color depending on its use and volume.
It has smooth midrange that is focused right in the middle of the musical spectrum, perfect for guitar.