If your referring to the cone speakers Dahlquist made at one time, in the past, they sold their design, German Physiks purchased all rights to that cone design and made improvements, which I own a pair of, wonderful speaker, I believe Dahlquist only makes wall speakers, and sub-woofers these days
SAE was a good company from, I think from California, I still have a tuner from SAE, which I no longer use, and has been out of business for a long time
krell was down, regarding business for a while, trying to make a come back, I have several models which I no longer use, due to needing service, not sure if they will service the old units, I know George Mayer will service just about any high end audio products, out of California

