Hi Tomho, nice amp/speaker combo there (I used to have the Rogers equivalent -- 16 ohms). Is there something wrong with the sound now?? Anyway, to your questions:
>what is the difference with the 4/8 ohms change<
Better matching the speaker load to output transformer. (i.e. it sounds better or worse depending upon which tap you use) Is there a problem driving the LS3's as is?
>I really don't want to turn the amp up-side-down to change to 8 ohms<
Humm, any qualified electrician who could help? I've never tinkered with your KR, so don't know if difficult soldering is involved -- BUT changing taps is usually easy (HOWEVER watch for stray current!!! Don't touch caps!!! And wait till the unit is cold -- esp. the tubes -- before doing anything).
>with the 83db speakers, and the amp is only 18 watts (with the KR 842 tubes), any comment?<
Assuming you mean driving problems and having heard this amp driving the Rogers LS3/5A, I have nothing noteworthy to add. If anything, the amp drove the speakers loud enough to turn down the volume... But I've no idea which tap was being used, 4 or 8ohm... sorry.
Good luck!
>what is the difference with the 4/8 ohms change<
Better matching the speaker load to output transformer. (i.e. it sounds better or worse depending upon which tap you use) Is there a problem driving the LS3's as is?
>I really don't want to turn the amp up-side-down to change to 8 ohms<
Humm, any qualified electrician who could help? I've never tinkered with your KR, so don't know if difficult soldering is involved -- BUT changing taps is usually easy (HOWEVER watch for stray current!!! Don't touch caps!!! And wait till the unit is cold -- esp. the tubes -- before doing anything).
>with the 83db speakers, and the amp is only 18 watts (with the KR 842 tubes), any comment?<
Assuming you mean driving problems and having heard this amp driving the Rogers LS3/5A, I have nothing noteworthy to add. If anything, the amp drove the speakers loud enough to turn down the volume... But I've no idea which tap was being used, 4 or 8ohm... sorry.
Good luck!