 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
In Reply to: SERIES networks - my first tests posted by Lukasz F. on October 27, 1999 at 04:45:04:
I am glad to see more people see the unbelievable differences that a series xo makes. I stumbled on to this a couple of months ago and after trying everything else, it has opened my eyes big time. I wish you would not have publicly brought this up because I want it to be kept a secret that only a few know of. Can you go back and dlete this? Just kidding. You should hear what this does with Dynaudio drivers. The attributes you mention are what I experience and yes it is so simple it's crazy. A lot of people worry about the protection of the tweeter but I have done this now on a cheap set of Home Theater speakers and after many loud and trying test, no problem. The inductor apparently gives plenty of protection. It also allows me to better hear differences in xo parts also. Before, I really did not see the benifit of Hovland caps and Gerotz AF inductors over MIT caps and Solen Perfect-lay inductors. Now I hear the difference. You can do a series as a 2, 3, 4, ect. For a 3-way just act like the mid is the tweeter and the woofer is the mid. Wiring stays the same. See this is to simple. Maybe that's why it is superior. The old saying, K(keep)I(it)S(simple)S(stupid) really applys here. The hardest thing is padding down the tweeter. Don't use a parallel resistor. You have to series here too. Jon is much more experienced than me with them. Like I said, I only stumbled on them a couple of monthsd ago. I was not going to tell very many about them. I am selfess. I am about to convert the Newform ribbon/ SS dual 8530's over to one next week. My Dyn's actually sound better than them right now. But not for long I am sure. Oh well, the secret is out. How about moving over here to the states and lets start a company with this. Yourself and I have similiar taste when it comes to design (boxless mids).Clayton
Like a dream ! I measured the impedance and it is not from this world. Ruler flat without ANY compensation components. The single ended amps which we use respond to that impedance with grace. Seems that you can turn them much louder without distortion and fatiguing sound.Now last night I added the bass and everything is still super. Even though the high signal goes through an additional capacitor which is the midrange hipass.
Overall improvement is like anther 10 000 dollars pumped into already excellent system.
NOW: I am going to apply this to the project 5 still in the birth pains. I wonder how the almighty 15W will respond to that XO.
Lukasz
PS. yeah, lets start a company. Maybe we should register it in Switzerland. The HANDCRAFTED IN SWITZERLAND tag sells itself at higher price. Skiing, wine and cheese is better too.
> > Like a dream ! I measured the impedance and it is not from this world. Ruler flat without ANY compensation components. The single ended amps which we use respond to that impedance with grace. Seems that you can turn them much louder without distortion and fatiguing sound.
Now last night I added the bass and everything is still super. Even though the high signal goes through an additional capacitor which is the midrange hipass. < <The only time I got this kind of flat impedance was with no xo at all experiment I tried. So far it has been 2 for 2 in getting rid of the need for a zobel. My Class A SE Monarchy monoblocks really love this. I am running three woofers parallel but actually have an average 3 ohm impedance with the lowest dip at 1.9 ohms, which if one had a bumpy impedance, it would eat most amps up. Does not run any warmer than when I was going the 4 ohm route.
<
> I agree. It was like inserting a much more expensive amp and pre-amp into the chain.
NOW: I am going to apply this to the project 5 still in the birth pains. I wonder how the almighty 15W will respond to that XO.
I will know by early next week how well the 15W works with it.
> > PS. yeah, lets start a company. Maybe we should register it in Switzerland. The HANDCRAFTED IN SWITZERLAND tag sells itself at higher price. Skiing, wine and cheese is better too. > >
Yep, there is something about that slogan that appeals to people. Kepp us updated with the 15W and how the series works with it.
Clayton
Clayton- Have you heard Fried loudspeakers? I believe they are one of the only manufacturers to use series crossovers. By the way, can CALSOD model a series network?
I have heard one of the older Fried designs back in the 80's. I wasn't into critiquing speakers then so I don't remember much except it was one of the better sounding speakers I had heard up until then. As to CALSOD doing series, nope, it won't. It apparently is seeing it as a mislabled node numbering. There is really no reason to have to use CALSOD with a series. They are that simple. Once you get your inductor value which is basically the same for a 1st order Butterworth, you just play with the cap value to get the desired results. I start out with a cap value equaling the inductor value, (inductor=.43mH - cap= 4uF) and then start raising the cap value by a uF at a time. For the two speakers I have done this on, so far both have resulted in the cap value being double the inductor value. Don't know if this is a trend or it just worked out this way. I am anxious to redo the Newform ibbons and SS 8530 split-cone and see if this holds out. Shane, who I built them for has brought them back down for me to try a series on. So far too, the need for a zobel has disappeared. The only pitfall is tweeter attenuation. You can not put a resistor in series, because it seems to change impedances and response drastically. It needs to be a parallel resistor.Clayton
As noted before, if you use an L-pad right at the tweter, and connect the rest of the series crossover network to the L-pad input instead of the tweeter, it will attenuate without messing up the network response. Unlike parallel networks, you can nout use a series resistor alone, you must use the full L-pad, properly calculated for the tweeter's passband impedance average.Jon Risch
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
