......well, this may be the one that gets me banned, I don't know, but hey, we're on the Accoustimass thread, ain't we?....I am going to post an IM session I just had with Bob, Mr. Crossover, because he told me some things at the last about phases-of-rolloff and que ratings I think a few here will be interested to read....Bob is too brilliant....he has been working an a crossover for a new model for 7 years....I am going to go ahead and post the whole IM session to let you see some different sides of Bob also....he won't mind.....
.....keep this in mind....when a crossover chops one side of the frequency response sent to a tweet, mid, or woofer, and that's all they do, the higher the amount of rolloff it can employ doing the chopping moves closer and closer to a "seamless" result.....now, no amount of rolloff will ever be perfect to 0.00.....so, inaudible, is the best that can be hoped for.....any amount of hangover, whether inaudible or not, is called the phase of that effort....if our effort so far had been to the ceiling of the woofer from the crossover inside the speaker, it will now be approached by the chopping of the floor of the mid element....with me?....the phase left over from the chopping of the floor of the mid element steps on the phase left over from the chopping of the ceiling of the woofer signal....if that "stepping-on of the phases", done by both phases coming together is inaudible, you're home....so, here's the IM Session, which I initiated in an attitude of where did we leave-off.....
Mulester360: AND,
Spkrart: no time today for audio geeks
Mulester360: I'm not so sure the TL's won't stay wired in series
Spkrart: too many questions, no answers
Mulester360: answers to burn, people to try things, nun
Spkrart: if they do you must have crossed ear drums like crossed eyes
Mulester360: they are now twice-efficient, like it or not
Mulester360: I think though the best for me will be the TL's wired normal
Spkrart: no they are not. they now draw double the power from your amps which are putting out twice as much current
Mulester360: with an SC elevated touching it for one voice
Spkrart: It is an illusion
Mulester360: Bob, the transformer is putting out half as it sees a 12 ohm load
Mulester360: each side sees a 12 ohm load out there in the bushes
Spkrart: Im checking in to the nearest State hospital. I suggest you do the same
Mulester360: send a card
Mulester360: I'm staying right here
Mulester360: the SC's are more stand alone series wired speakers than the TL's
Mulester360: that's why I think the TL's wired normal and SC's wired series will be a great match
Mulester360: haven't tried an SC up right beside a TL, but I can see it as I listen to them individually
Spkrart: You cannot ask a store to go through all that **** They will bounce you out on your ear, your good ear
Mulester360: the SC stands alone though, wired series, and there is no doubt the result is very good
Mulester360: who said a damned word about a store?
Spkrart: I think you're missing a wrench
Mulester360: and I've got the speakers I'm going to quit with anyway
Mulester360: you just won't try it with the ones you've got setup....the ones with 2 6 1/2 woofers
Spkrart: cant
Mulester360: horsepooperino
Spkrart: no second pair
Spkrart: just one pair of speakers
Mulester360: one pair will do fine
Spkrart: no it won't
Mulester360: wire one in series and point it away from you and don't attach an input into it yet
Spkrart: no can do with this amp
Mulester360: listen to a passage about three times only through the one pointing toward you that is wired normal
Mulester360: horsepoop, you got two banks
Spkrart: one bank
Mulester360: you getting stereo through two speakers with one bank?
Spkrart: stereo through two banks and one mortgage and loan
Mulester360: cross the wires on one bank and point the speaker away from you....notice the one pointing toward you has now come to life in the mids and highs
Mulester360: try it or screw it, I'm done
Spkrart: maybe tonight when im drunk
Mulester360: twice-efficient accent speaker
Mulester360: please try this....I want to share it with you, no kidding
Mulester360: whatever and whenever
Spkrart: ok
Mulester360: rotate around the accent speaker pointing away from you for taste
Mulester360: mono signal to both
Mulester360: now I'm done
Mulester360: haha
Mulester360: Bob, listen, I kid you not and raise my right hand....I have been running both the SC's and TL's wired in series for about 4 weeks now....with HUGE headroom....cranked at times for sure
Spkrart: send me schematic
Mulester360: damn
Mulester360: mail or pony-express?
Spkrart: mail
Mulester360: do not hold breath
Mulester360: I would have thought both sides of the mid element would be cut by a crossover
Mulester360: I have been staring into space a couple of times over the tweet rolling off at 60 per octave
Mulester360: with the TL
Mulester360: I see your seamless thing
Mulester360: 24 on the ceiling of the woofer.....damn
Spkrart: zero phase error makes them seamless
Spkrart: Got to go get wife at Dr.
Mulester360: yes, the area of a phase is determined by the rolloff
Mulester360: ok
Spkrart: phase is a lot of determinations. Makes the math difficult. Sound has to arrive at its destination on time, together, like two thrown balls hitting the wall at once
Spkrart: called phase ques
Spkrart: the first reflection
Mulester360: aaahh, is that the que rating?
Spkrart: later dude
Mulester360: ok
Spkrart signed off at 6:52:19 PM.