This is the crossover of the 1970's, the circular objects are the inductors, five of them, the other parts are resistors and capacitors. These are not the only inductors i have seen like this. And the only thing I can think of is that most of them are just copycats of the orignal 1970's version.

Good day folks. This is my favorite month of the decade, but you need not be concerned about that. I was hoping to show you some crossover technology from the 1970's but I seem to have lost that file. Anyway it was a 5 way speaker that had been crossed over at a 6db/oct rate and toned down with a bunch of resistors. The pair sounded fantastic but I now wonder exactly how much they knew and how much was experimental and just sounded right. Because the dimensions of the inductors are completely different from the ones I am about to receive. Which makes me excited about what this 4 way system could sound like. Previously I had showed you a picture of what I thought would be a close version of a tweeter inductor, and the difference it made. Well that difference was at extremely hi volume where one ear was piercing and the other was not, at low volume you really could not tell much of a difference at all. These new inductors could produce off the charts at all volumes. Primarily because the people making inductors today have never done this before, it is new to them and they had to start from scratch, a rather enormous task especially for anyone not really knowing what they are doing, like possibly back in the 1970's or your average joe who is just winding up an inductor on his lath. Your ability to measure the inductance is only as good as your equipment. So we patiently wait for our precious inductors to be delivered knowing they should be far superior to anything in the past.

Hi all, today we have a picture of an unshielded tweeter inductor perhaps 2000 or 3000 Hz, ours is going to be cut off at 5000 Hz. But even this inductor placed in paralell has a dramatic effect on eliminating the harshness of the raw tweeter and does better than a resistor because the inductor acts as a resistor in addition to acting as an inductor. The other photo is an inductor being used in circutry, to complete a 24db/oct it would need 2 capacitors and another inductor and to fine tune it you would need to get the inductances correct and for our purposes wind it to 5000 Hz. I knew these inductors would be a major link in the success of this project and they were the first thing i began to investigate and the only thing i'm still waiting on. Have a good day.

TESTING

Hi folks, well, the pre-amp is back and the equipiment test was positive, power to spare. So with the cd player pluged into the tape input I tested the raw drivers, all eight of them. And with out having been lifted or time aligned or contained or crossedover they sounded pretty good, which tells me that all the equipment is working just fine and the speakers just need to be fine tuned. We are still waiting on the most crucial part, the inductors, which hopefully will be coming along soon. Until then have a blessed day.

Good day folks, it would seem that the law of supply and demand also works in reverse. Over time, if there is no demand there will be no supply, and that is exactly what we have here. These inductors are a very sophisicated, esoteric part not to be created by an amature. I found some fantastic people willing to take on the challenge and I can not thank them enough. When considering design there were an infinant number of choices between amount of drivers and crossover points ect. to construct a speaker. I decided that if you wanted a 2,3,4,or5 way speaker just make it a 4, and if you wanted a 6,7,8,9 or 10 way speaker just make it an 8, and that will be the focus of this blog for the forseeable future.

Design cont...

Design cont.

Greeting people, I finally found someone to make the inductors needed for testing, they are being made now. As you must trust the people and their work of the past you must also trust your equipment. I am using the famed hafler 500 amp and its companion the DH-101 preamp along with a cheap cd player. These have all arrived but they do have some age 25-30 years and the equipment test confirms this. I am going to start with the preamp and have it rebuilt like new, perform another equipment test and go from there. I hear all this talk about digital speakers, but they have been at it for awhile and I suspect they may be having difficulties reproducing varying magnetic fields digitally. So while they are doing that we shall forge ahead. That's all folks.