I am in process of building 4way, precisely 2x active, with 2x passive. And wondering if I must have some kind of crossover before horn and tweeter? Maybe condenser of 14uf (1500hz,8ohm) or so in line for the case of 50/60hz humming or dc impulses when amp is turning on/off or in case of bad connection? Putting tweeter directly on an amp don't seems too smart for me...
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I've been using my 4way actives for a number of years now.
They have a compression tweeter and the amp driving it right now does produce a turn-on thump but even without a cap it has never been a problem whatsoever.
On the other hand I also use a ribbon supertweeter which I protect with an 18dB/oct high pass (5kHz, the ST kicks in at 12kHz).
They have a compression tweeter and the amp driving it right now does produce a turn-on thump but even without a cap it has never been a problem whatsoever.
On the other hand I also use a ribbon supertweeter which I protect with an 18dB/oct high pass (5kHz, the ST kicks in at 12kHz).
@Charles, Bobodioulasso
Thanks for answers...
Next.. If I decide to put condenser, it will make 90o phase shift...
than, I should use inductor in woofer line to get opposite 90o for 180o
difference for connection with opposite polarity?
Hi,
No. There is no phase shift in the active region of
the tweeter if you use a decent sized capacitor.
rgds, sreten.
Thanks to all
there is my idea about crossovers in lo and hi active channels. What do you think?
There is no zobel or sensitivity compensation, this my is first concept.
How zobel should looks like for this configuration?
I have no much data about drivers...
What kind of box to make? I thought about compression boxes for both bass drivers - apr 40-50l for woofer and 10-15l for bass/mid...
there is my idea about crossovers in lo and hi active channels. What do you think?
There is no zobel or sensitivity compensation, this my is first concept.
How zobel should looks like for this configuration?
I have no much data about drivers...
What kind of box to make? I thought about compression boxes for both bass drivers - apr 40-50l for woofer and 10-15l for bass/mid...
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I have information about this 12".. nice but soft bass. My idea is to make reference monitors for studio and i need tight bass around 200hz for bass guitar and drums kick. At the other hand, horn goes to 16khz.. good but maybe it is better to have dedicated tweeter for highs over 10k?Personally, i would make it simpler: two ways active.
12" + horn. (about 60liters)
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Using quickly Winisd beta , you can see volumes and bass response for a vented box and a closed one.
vent diameter and length, ( not shown) i read
diameter: 0.102m
lengh: 0.169
These are rough results that you can optimise downloading Winisd beta and entering Fs, Vas and Qts.
vent diameter and length, ( not shown) i read
diameter: 0.102m
lengh: 0.169
These are rough results that you can optimise downloading Winisd beta and entering Fs, Vas and Qts.
Attachments
Using quickly Winisd beta , you can see volumes and bass response for a vented box and a closed one.
vent diameter and length, ( not shown) i read
diameter: 0.102m
lengh: 0.169
These are rough results that you can optimise downloading Winisd beta and entering Fs, Vas and Qts.
Thank You, very useful tool
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