[quote name='peted' post='458150' date='Apr 9 2009, 10:16 AM']I've been able to A/B compare the ABM and Klystron heads in a music shop. There was definitely more top end when the amps were run flat, and the bottom end sounded slightly extended and response was tighter.
I think you can get a much more 'modern' sound out of the Klystron heads, the ABM covers the 'vintage' sound more naturally. I think you can dial in a pretty good ABM sound using the Klystron, but you won't be able to do it the other way around.[/quote]
Thats exactly what I felt about them.