Why would you want to route vocals through the tweeter ?
I came to know about series crossover through this:
View attachment 28976
Series crossovers do need fine quality drivers and are tuned by ears. Swears the person who designed crossovers for pureaudioproject for their Open Baffle speakers.
"Why would you want to route vocals through the tweeter ? " The vocal range is normally extended to around 3khz . In a speaker box, the tweeter diaphragm is the lightest massed unit. it can respond faster and stop faster. Also since lower 'bass frequencies' like anything under 500hz is not coming to the tweeter, the partial vibration is relatively low compared to woofer.
By using them to handle much more lower frequencies you are having the advantage of making vocals to sound more energetic, more complex passage would sound dynamic. Many brands like Spendor, Harbeth and so on do this on their two way designs. But, those tweeters are designed to handle the speakers. So till what point can a tweeter handle lows,? it can handle anything provided, so little power reaches so that that little suspension of the dome does not loose its ability to pull it back. Also, till ferrofluid leaks out which is one of the crucial elements making them to move in a controlled way.
So rule of thumb of crossover design is to leave an octave between the fs and crossover point for a tweeter. This is to avoid the suspension break on the tweeter by getting it to the strain faster than the woofer. The voice coil may not break , but may be you will end up with ferrofluid leak or failure of the suspension.
Again, "
"Why would you want to route vocals through the tweeter ?" to make it faster, less coloured. By doing so, the tweeter power handling before breaking is considerably lowered. Manufacturers tend to play safe by crossing it high. For some people like me , its a eureka moment, when I found I can make a better crossover than the manufacturer. -all until I realized it was there for a reason.
" This tweeter does not have a resonance chamber and the magnet is opened to the ambient. " - Can you post the model number of the tweeter? I have used this one before :
https://www.madisoundspeakerstore.c...-bc25tg15-04-1-textile-dome-tweeter/?mobile=0
From the tweeters design point of view that tweeter SHOULD not change the sound depending on what you do behind it. The front dome is totally isolated from the rear in this case. Why? To install in boxes without further isolation to protect it from the air movement from other drivers. Can say it is sealed in one way and the only sounding part is the dome. Are you sure the lower handling is not due to your box's baffle? If the pipe structure alone, is making a sound difference, outside the box, can you explain how ended up deciding the length of the pipe to be used? Sorry for the long questionaire. I also had noticed change in sound of treble before in the boxes, but always it had to do some thing with the cabin itself. If this is the case, I can start consider trying it.
From the tweeters design point of view that tweeter SHOULD not change the sound depending on what you do behind it. The front dome is totally isolated from the rear in this case. Why? To install in boxes without further isolation to protect it from the air movement from other drivers. Can say it is sealed in one way and the only sounding part is the dome. Are you sure the lower handling is not due to your box's baffle? If the pipe structure alone, is making a sound difference, outside the box, can you explain how ended up deciding the length of the pipe to be used? Sorry for the long questionaire. I also had noticed change in sound of treble before in the boxes, but always it had to do some thing with the cabin itself. If this is the case, I can start consider trying it.[/QUOTE]