I must also confess to selling my McIntosh Mi-200 (industrial tube amp circa 1950), and my Western electric 594A 2"field coil driver (Circa 1930). I have never fully recovered from this mistake. The Mi-200 had the greatest bass I have ever heard. I cannot now find any amp,at any price that sounds anywhere near that fantastic. The WE driver had the most astounding and clear mid-range in existence. I sold this mono set to get into stereo 30 years ago, I mourn their loss on a daily basis and cannot find a suitable replacement. I feel heart broken,remorseful and depressed that these cannot be replaced, their prices are now astronomical.