Hello. This is another catch all thread about speakers. I have a lot of experience with all sorts of speakers. This thread may work and it may dive, but at least I will know that I've tried. This thread is about sharing info on how all guitar/bass speakers sound, whether they be Celestion, Eminence, Weber, Tone Tubby, etc. Not all Celestions sound that good, especially by themselves. This is the latest trend in the speaker business, mating two different sounding speakers together. Eminence is now selling a variety of Tone Packs. These can be seen at Guitar Center and Musician's Friend. Here are some of my speakers mods. I have installed an Eminence Red Fang alnico speaker in one of my DSL401. The other 401 has a JBL D123 in it. In one ot my 602's, I have two Altec 417's and in the other 602, I have two JBL D123's. The JBL's are 1961 models and the 417 is from 1972. Here are some pics. Front View of JBL D123 (12-inch): Back View of JBL D123 (12-inch): Back View of Altec 417-8H (12-inch) Back View of Eminence Man 'O War speakers (12-inch) in TSL122: Web link with sound clips for Eminence Red Fang (12-inch): Eminence - The Art and Science of Sound Front View on Eminence Red Fang (12-inch): As you can tell, I like a lot of different speakers. I was a shop manager for a large Phoenix Pro Audio store and we repaired all the top brands of speakers and speaker cabinets. Right now, I am experimenting with some Eminence Delta Pro 12A's. These are actually mid PA drivers, but they make killer guitar or bass speakers. They are good down to 52Hz and start to roll off at around 4.5K. They are a neutral speaker and do not add any coloration to the amp. I'm finding that with a Marshall head like a TSL100, this is a good thing. The amp is more articulate and ballsy on its own. These speakers trim out some of the harshness associated with these amps. Web link for info on Eminence Delta Pro 12A (12-inch): Eminence - The Art and Science of Sound Please add your comments about your favorite speaker. I would really like to meet some members who have a background in old JBL and Altec speakers, as well as Utah, Heppner and others. More to come as I get situated.