Thanks for the reply. looks like
1. Purchase a working original. They sometimes come up for sale
2. Purchase a 4 ohm original and adapt it.
Since both woofers are AR-2ax replacements and the pots are Lpads there is no need to keep the cabinets AR5 original. I would like to at least keep the drivers in the AR family.
My options are, Will look for original AR5 mid. Else:
Look for 2 four ohm AR3a/11/lst mids for replacement in both cabinets. Then sell the working AR5 mid.
Would that be a better alternative then just replacing one bad mid driver and living with the good one? Subjective question, could you hear the difference in the mids?
My understanding is that a resister is inserted in series to maintain the 4 ohm driver impedance at 8 ohms. Are there Crossover components that need changing?
Adding a series resister would show the amp about an 8 ohm load. is the loss of sensitivity across the series resistor canceled by the increase sensitivity of the 4 ohm mid?
Since I an still learning, if the question can be answered by me researching let me know and I will research it. . Thanks for the help!