I have a pair of Altec 846B's I purchased new in 1976. One of the horns has been repaired. Other than that, they have never been altered. I have always loved the sound, but lately they just don't seem to sound the same. Is there an upgrade program, refurbish, or am I stuck with what I have. Other than the foam part of the grills falling apart, they are perfect. I don't want to sell or trade them, I just want the sound improved to much as it was.
Thanks