New valve output stage board from top of line Stibbert Black Pearl.
Can be fitted to earlier Stibbert giving more resolution and control.
The Loth-X are the best-sounding unmodified full-range drivers ever with beautifully machined frames, stiff cone-doping giving a pistonic movement (no folding) and high quality speaker terminals etc. 104db to 108db sensitivity – horn cab dependent.
Flat 8 ohm and extremely rare as were not sold separately from speaker cabs.