>In order of narrow to wide differences there are: 1) Ampex, 2) NAB and 3) >Euro standard widths. If you use a narrower playback head than the >recorded track width, you will experience the "fringing effect" which is a >low frequency boost below 100Hz. And a wider playback head than the recorded track will increase tape hiss from the portion of the tape it's reading that is random magnetization (or worse, unerased material from a wider track format). -------------------------------- David Bradley - Webmaster - Official Klaatu Home Page, [log in to unmask] Check out the Official Klaatu Home Page at http://www.klaatu.org/ Carpe Ductum - (seize the tape) "Time is an illusion... lunchtime doubly so..." - Douglas Adams