Setting Up Front Imaging

Link's bad.Sasquatch...

We know your legend's real...

tubbs04 wrote: hey dave! I opened up this 4xs and it says the crossover is at 150, the front PFM filter has 90hz written on it, the rear/2 ch PFM filter has 30hz written on it, and the subwoofer is at 70. Are these okay??

I can't find anything on the 'net regarding the actual settings on that crossover. I can BUY a manual from Audiocontrol, for $11.00, but I'm not gonna... I'd like to see (...and I am assuming that you are dedicating the 4xs to the doors) the PFM set to the same frequency as your sub (To be determined, but 90Hz seems a little bit too high, to me. Aim closer to the 50 to 65Hz range) around 250 to 300 for the mid-bass/mid transition, and 3500-4000 for the mid/tweeter transition.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

so how do I change it from 90 hz to the 50-65hz range? is there another module I can order?...don't crush the weasel...

I was able to find the manual online as well... Using 14 pin DIP headers, you can build any frequency module you want. Headers can be had all day long for 50 cents a piece, and resistors are a dime a dozen, almost literally - even 5%-ers. To figure the resistor value, divide 7200 by the desired frequency, and this will give you the value for the needed resistor. 7200 / 60 = 12.5K ohms (This is the PFM) 7200 / 250 = 28.8K ohms (30K is more available, and would be 300Hz) 7200 / 3500 = 2.05K ohms (2K is FAR more available, and close enough...) You already HAVE these, or should still have them... Saves you the work! The modules are CAKE to build. You simply solder the resistors ACROSS the DIP header, 6 each, leaving the middle pair of pins open. 2 headers, 12 resistors, and 10 minutes with a soldering iron, you're done! BTW, if you cannot find an exact resistor value, divide 7200 by the AVAILABLE value, and this will tell you the frequency you will achieve. Example: 7200 / 2000 (2K ohms) = 3600Hz Because no audio signal actually travels in or through these resistors, Vishay or some other high-dollar exotica isn't necessary, but the tighter you can get, TOLERANCE-wise, the better off you're going to be. I recommend 5% or better. (Resistors come in 20%, 10%, 5%, 2.5%, 1%, and precision. The lower the number, the tighter the tolerance, and the more expensive they will be.) Carbon pile (less expensive, more available, and generally can be higher precision) or wire-wound, 1/4 watt, is all you need. Industry standards resistor decades. That chart will tell you EXACTLY what resistors you will be able to lay hands upon... Additional information, for those interested. (I am on lunch, sitting in my car... I HOPE you end up with (at least CLOSE to) what I have, or at a minimum, something that you will be happy with. Gawd, I love the sound of my stereo... I feel like Rick Davies is standing right in front of me.) It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."