Pictures of the ME1 based speakers
Two with the subwoofers.
The left one with one subwoofer.
The 3 raw enclosures stacked up.
A picture of the back : remark the 10 mm layer of soft board glued to side, bottom and top panels to improve damping. Measurements of electronics magazine "Elektuur" several years ago indicated that this gave far better sound isolation than most other means. Front and back panel are double thickness 19 mm MDF (so 38 mm total). The prototype box has shown that this results in very little vibration of these panels.
The back panel ready to be glued in place (after the wiring will be installed). A 4 cm layer of acoustic foam with sculptured surface covers this panel to eliminate standing waves at higher frequencies.
A picture of the front showing the mitered surfaces for the speakers. I used the asymmetrically positioned design of the original ME1 to (hopefully) get better diffraction properties.
A picture of the back of the prototype box. You see the 4 cm port in the middle and the loudspeaker terminals for both bass speakers and the tweeter.
A picture of the front of the prototype speaker : drivers used are two VIFA P13WH-00-08's and one Scan-Speak D2905/9500. I build the original crossover filter of the ME2 and experimented a bit with an active crossover. The prototype speaker with the standard passive crossover sounds very nice but measures not very flat (I have to do some extra measurements outside). A broad dip at the crossover frequency is apparent.
The prototype
speaker on a metal tube stand, as can be bought in DIY-shops. It has
exactly the right height. I still have to find out if this will not ring
at some frequencies (after all it resembles an organ pipe and is not
damped in any way). In the final speakers the bi-wiring will run through
these tubes to the crossover I will install in the feet. I will prepare
the speakers for bi-amping and active filtering.
A picture of the original ME1 filter I made.
If you have any questions regarding this project write me at luc.henderieckx@telenet.be