Originally Posted by soniky
Maybe let me ask the question a different way. On page 23 of the manual (Bi-amping your speakers), it shows front height goes to the higher freq driver and the regular front goes to the lower freq. driver. This seems to indicate to me that internally SC-68 does have filters feeding different signals between those two amp outputs. Is this true? and if so, doesn't this qualifies as Active Bi-amp which would be worth to consider?
gosh - you are making this much too hard (sigh)
I am going to try one more time to set you straight then I'm giving up
these are 2 examples of what is used to active bi-amp:
review the features of these. do you see anything resembling that in any receiver you've ever looked at or owned? no
just because 2 speaker connections are labeled hi & low doesn't mean there's any circuitry behind them to separate the frequencies
let me ask, how can Pioneer know all the designs of thousands of speaker companies and models and program the receiver to automatically know that in advance when you plug in a speaker cable? it can't. or do you see anything in the menu where you can modify the crossover design like the 2 examples above? no
here's why it can't be done in a receiver and takes a custom box, either with adjustable controls or one custom built for a specific speaker and results:
I'll take 2 speaker companies and models:
Polk LSiMI707 tower:
Xover for tweeter: 3000 Hz
Xover for midrange: 300 Hz
Xover for woofer: 100 Hz
Magnepan 3.6R planar (my speaker)
Xover between tweeter & midrange: 1700 Hz
Xover between bass & midrange: 200 Hz
I hope you can see how radically different these are
OK - do you see anything in the Pioneer menu that would allow you to set these or change them? I hope not because if you do, I'll trade you
and there are 2 way speakers, 3 way, 4 way & 5 way with a multitude of cones or drivers used, each one for a specific acoustic sound in which the speaker company designs a unique crossover circuit tailor-made to make that cone perform its best in the freq range it's best designed for. and there are various crossover circuit designs, each with its own phase characteristics, and unique reasons for use, names like Linkwitz-Riley, Butterworth, Polk uses an Orth design in one its bookshelves (whatever that is
) - I'm not an electrical engineer so I don't know how they differ, I just know that they do.
Pioneer cannot possibly build-in that kind of capability at the price point these receivers are. For example, the Bryston is over $3000 & funcitions in the analog domain while the Behringer is a budget unit in the $400 range that functions in the digital domain using analog-to-digital, back to analog converters. There are custom designers, like Marchand Elec, with will build you a crossover box based on a given speaker design or will use crossover points based on what the user tells them to use. or DIY's...there are many ways to do it.
but not in a receiver, not in a Pioneer or any other brand ever made.
it doesn't exist so wishing it were so doesn't change anything.
all any eceiver can do is passive bi-amping since that circuitry isn't in there. Now if you were willing to pay $10000 for a receiver with digital programming so you can design your own and apply it, sure Pioneer/Denon/Yamaha/Onkyo can do it.
and I've ignored the fact that speaker designers spend lots of hours and money in listening rooms & aneochic chambers, tweaking the circuits so they get the sound they want. What makes you think you & I, being speaker design dummies
can equal what they pay EE's and audio engineers big bucks to do? the best use of an ext crossover box is to DUPLICATE or mildly tweak the companies crossover points so that they CAN separate the signals for active bi-amping, not re-design the speaker.
is it clear yet?
the reason for the labels is convenience. that's all, something so the user can hang his hat on where to plug the 2 sides into. trust me, I've seen the service manuals & circuit diagrams, both "hi" and "lo" are equal electrically and have nothing between them, just 2 amps putting out to 2 different jacks. How can they be otherwise since they ALSO can power & send the full freq range to the heights or widths.
I know you are trying to learn. so I spent the time to show you examples of why it isn't the way you'd like it to be
but sometimes you'll have to accept that some of us old timers know what we are talking about. at least enough to be able to help folks use these things