Crossover Question - Ranger and Viking I think!

lets look at a few things

the 2) 6 inch mid bass drivers have a rather high roll off at the upper end, so we dont want them playing into the range of the tweeters. The tweeters are VERY efficient at 105 dB !

Speaker placement and power input will also help determine at what frequencies we should roll of the upper end of the mids and the low end of the tweets. Also are you planning on haveing this strictly for SQ or to tear your face off!!!! ?

 

220 x2 isn't a lot of power for you? lol. im running 110 x2 to 6 speakers and it gets plenty loud in my truck.

im not sure it will be running at 2 ohms tho. im running 2 mids and a tweet per channel @ 2 ohms. both mids are crossed over by the head at 80HZ hi pass. the tweet has its own passive crossover that it came with. only its not showing resistance to the amp. so the amp only "sees" the 2 mids.

but with the tweets high S/N ratio i think you'll still be happy with the output.

im sure there is a way to build a passive set up that can let the amp see a 2 ohm load. not sure on this, but im sure there is a way.

funny thing is i was going to ask this very same question to these two guys. i went to the book store to look for any books on the subject with no luck.

i wouldn't mind knowing how to make attenuation circuits and the like.

 

i am thinking that the tweets will need a x-over point of about 8kHz at 18dB/oct. A few reasons for this, first it will enable greater power handling, second it will blend in with the roll off of the mids, and third, it will put it well above the Fs point which is unknown in the specs sheet. An additional note here, If you plan on running this at high levels for extended periods, may think about also incorporating a small automotive light bulb and resistor in with the tweeter circuit.....I will have check into the protection circuit more...been years since I did it, but it makes the tweeter blow proof (almost)

 

If I remember correctly(its been a while for me too) the "light" trick works when the light is run in parallel with a wire(i never used a resistor)...and those are then placed in series with the speaker....the power will usually run the path of least resistance(the wire parallel with the light) and when the tweeter is overpowered or clipped the light will actually light up and "absorb" the DC voltage(clipping)....sorry if that is a bit confusing, but that is the best my poor old brain cells can come up with at the moment.

Oh...even if you dont run for long periods of time, it doesnt take but a fraction of a second to pop a tweeter....especially trying to keep up with 3500w of subs......

 

oh boy....now i gotta go dig out my old files and tech sheets...if I can find the darn things!!! I think they are up in the mezanine of my shop, but not sure....and its like....3 degrees out, and the heat is off out there!!! let me see what I can find......

 

here johnny....http://www.diyaudioandvideo.com/Calculator/XOver/


Use this...use the third order butterworth design for the tweeter.

Not sure where my tech papers are....this will work though

 

There is crosovers already set up with a light

my directed neo 6.5s have em

 

yep....... give that a try!

 

you can use a PC board, or even solder them all together and use use silicone to fasten them inside a small project box with input and output wires coming out of it. Radio shack might have what you need. If not look at parts express . com.....

Be sure to use a minimum of 100 volt caps and might think about using iron core inductors to prevent coil saturation since you are pushing alot of power

 

.12 mH...............its L1 in the diagram

 

Alot of times you wont find EXACTLY what a x-over design program spits out for values. It just gives you the numbers as needed EXACTLY for a DEAD ON value. Most caps and coils have a tolerance of 5 - 10% + or - .......

So with that said, get caps that are as close to the values as stated. Or even get 2 to make one. example....a 100 uF and a 20 uF wired in parrellel together will make a 120uF cap.