I have a set of Dynatstic speakers circa late 60's I use mine with Chinese single ended 845 amp by Mr Liang currently retailing for $10K on ebay no where near what I paid for mine.

They are odd speakers mine use 12" Richard Allens CP12 I think and a 9 x 6 " Shackman.  They can sound lean but then again when they need to they kick ass with the bass, they do and with layering as well of all instruments from the bottom up.  I was listening to the Antal Dorati Mercury Living Presecence CD of the 1812 with the live cannons.  I thought I was in the presence of the real cannons...sounded stunning.  Especially with the 845 amp you could hear the crack of the gunpowder followed by the noise of the shot leaving the barrel and as for Wellingtons victory which is on the cd as well using period weapons yet again, sounded like the real thing to me.

My opinion is if you need to play around with the sound of these speakers or any piece of equipment then it is more likely a case of not matching the overall sound of your component parts and that you should be looking elsewhere.

I have a couple of sources I use with my amps being fed direct from a phono amp or from cd and the other input being from the dvd/cable/tv box.  I listen to my amps and the speakers all day if I am sat at home like today listening to the tv or the radio.  I like the sound of my system and there in lies the issue.  I would leave well alone and not fiddle with them at all my only issue might be with the cabinets and that is the only thing I would change given a choice.

Steve in the UK