Here's my audio page and this is where I am going to present my project in the audiosphere and some useful links to some audio pages that I like. In my "career" as a speaker-builder I have made three constructions. All these opinions are my own and are all subjective since I have almost no equipment with which I can measure the speakers and the results I have made b doing some changes to my constructions.
This page is still under heave construction and will soon be updated with plans and pictures!
A three-way speaker with Sinus 1" Tweeters, MGR 6.5" Midrange and a 10" MGR woofer. The tweeter and midrange were mounted in a triangular box with lots of stuffing in it, a bit too much since the midrange was compressed but I learned but never really did anything about it. The woofers were mounted in a similar but higher box that was tuned. The system was supposed to stand on each other in a corner using a amplification of the room since the boxes for the woofers were quite small and didn't let them play out fully. The vents were too small so they made audible breathing noises. All in all I think that this system wasn't too bad considering what I had thought of while doing them. The only thing I was concerned about was bass and I didn't know anything about building speakers, I just grabbed a volume out of thin air and then calculated the vents after that.
Two-way speaker with 1" MGR tweeter and 6.5" MGR bass ( taken from the project above ). Since I then had no use for the 10" woofers I made a bass-reflex subwoofer out of them. This system sounded better but the filter between tweeter and midrange is cut a bit low which can be heard by the tweeter sounding a bit harsh sometimes, the tweeter isn't sweet singer otherwise and now it bites. This time I used some more knowledge while constructing since I had read some after the first not-so-good project. I made a box after the specs of the elements ( 37,5 litres )and the tuning was calculated again. After assembling the speakers I didn't spend much time listening to them but I must say that I must have been lucky to have them sound this good. I like the sound but I am not happy with it. The woofers were put in a 80 litre box with a large vent. The tuning of the subwoofer didn't come out as well, it turned out to be a ordinary "BoomBox".
When having those speakers at home I wanted to get some more perspective, depth and width in the soundstage so I bought a couple of old Kef 8" coaxial speakers. I took them out of their original boxes since they sounded quite bad, the boxes were too small and I think the reason was efficiency and power-handling. I measured the speakers and then tried to make appropriate boxes. Since I have no experience in these matters the measurement can be wrong but I looked at other measurements and they seemed rather alike so I went for my numbers. The problem was that the elements were suited for a closed box and that the box was supposed to be 130 litres, I found that unacceptable since They would have been the size of a wardrobe and the power handling would have been awful. I went for a smaller box ( 36 litres ) fully aware of the problems that could occur. Things went as I thought, I got a peak at about 50 Hz and the power handling was enough. There were some strange anomalies in sound but after changing the filling from short fibre polyester to a longer one the sound changed and became smoother, the bass got deeper and the peak was lowered ( in volume, not frequency ). Then I began thinking of acoustic glue and lamination. After thinking a while I laminated the box ( made in MDF ) with another fibre board and put some acoustic glue in between. The change was bigger than I had ever expected since the peak now got lower both in frequency and amplitude and the sound overall got "calmer" and sounded clearer, I was thrilled. After listening a bit more I decided to try dressing the speakers in cloth and after that the upper range got even more calm but some of the soundstage disappeared which was a disappointment but on the other hand the soundstage got more accurate. I am pretty content with the result but I am still not satisfied, the next project will be better, I hope.
Two way speaker with Vifa 1,5" tweeter and 8" woofer ( there is more to come )
How to Make Electrostatic Loudspeakers
A "Do-It-Yourself" Speaker Project