davedotco said:
CJSF said:
You are all missing the point, 'we are stuck with cable' for true 'hifi SQ' . . . A little sideways thinking can give a whole new perspective on what goes between amp and speaker drive unit. Use a 'full range speaker/driver', the crosover, its active components and their potential colouration (affect on SQ) are eliminated? The amp is conected directly to the single full range speaker terminals, there is no crossover requirement. No large amount of power is usualy required as most full range drive units are high effiency.
Almost a no brainer?
CJSF
According to Wilmslow the Eikona VTLs are just 86db/w, hardly 'high efficiancy'.
Of course the advantages of connecting the drive units directly to the power amplifiers are well known, but having embraced that I wonder why you have not 'gone the whole hog' and looked at fully active designs.
All the advantages you mention above but with the added bonus of being able to use drive units purpose built for the frequency range required and driven only over the most linear section of their range. Resonances are better controlled and the ragged behaviour of all drivers at the extremes of their operating range can be reduced to inaudibility by high order electronic crossovers.
I understand that you see the Eikona VTL as a project, (I would love to be able to do something like that but do not have the workspace,) and a fun one at that, but take those ideas further and a fully active two or three way speaker is where you end up.
Yep points taken Dave, I did use the word 'usualy', indicating not always. I was aware of the 86db on the Eikona drive unit, I never do things the easy way . . . I am a valve man Dave, if you think about it, the 'full range' option is the rout a valve man will take.
The whole thing regarding speakers and the problems I have experianced with the PMC's has become a project. Taking advise, I have been pointed in the direction of my room as the problem? I have fiddle, pushed and pulled, the room is small at 12ft sq, and a bit clutered too, finding an extra 4 inches between the speakers has made a considerable differance. So its probably not the speakers, its me not wanting to get 'involved with the room'?
So, one is now into a project rather than fixing an issue. I like things like this, especialy working with wood, I have a 24ft shed, half full of junk, but reasonably well kited out, I make and fly RC model airplanes, have done for 60 years, so making a speaker cabinet is simply an extention of my modeling skills. The last thing I did for the hifi was make a TT shelf from an old cottage style open arm chair, I now have an 'old arm chair' screwed to the wall . . . *biggrin* I did post pictures on a thread a year or two back?
The next few months will be interesting, revamping the room, getting rid of the clutter that is my 'studdy', PC, desk, etc. The PC will become a lap top/iPad? so that I can do my computering from the sofa, that includes selecting music, which I curently have to go sit at the desk/PC.
A whole new world is opening for this 67 year old, an open mind is leading me in a direction I never even considerd four weeks ago . . . The computer side frightens me but the benefits and pleasure with the hifi will offset this. Getting the right help with the computer issues is the main problem?
CJSF