1. Remove front grille, screws in the back. 2. Remove rear cover, screws in the front under the grille. 3. Make a wiring/reminder diagram/note to show how the speakers are hooked up. Double check, and compare to the other speaker. Then unsolder the old speakers. Remove them. If you are worried --- do the left first start to finish then, compare wiring to the the original right speaker, if all is correct --- do the right one. 4. Lay the speaker down on it's back, prop up the top to make it flat. (Note you may have to unscrew the crossover temporarily, just to have it out of the way) 5. Pencil in your cut line, and cut your first speaker hole larger. 6. Test fit. 7. Do the rest. 8. Designate the colored or + tab as positive and the other as negative. Solder them up. Point here is to be consistent so that the speakers will be in phase. 9. check again that all is well. 10. The rear cover fits back no problem. The front will fit, but more closely than before. Patience is a virtue. Start at one corner. It will fit unless you really did not center the new speakers.
Ok, how did it all turn out. Simply great and you will be surprised at just how much sound you had been missing as your original speakers were going bad. I have listened using movie soundtracks, rock, 1812 overture with cannon and musket fire, as well as easy listening. No, I have not intentionally driven them to the amp max.
Last thing I had to do was to reanalyze the sound spectrum. I greatly reduced my bass levels. You will probably have to do this also.
As of the date of this post AES had 55 of the 16ohm Sica Solids in stock. The 8ohm version may work just as well. I chose the 16ohm ones based on my test of the voice coil resistance.
Any questions???? Lee -- Yesteryear Radio and The Clock Doc