The bass enclosures ready for the ScanSpeak 18W/8531 drivers
A view of the Coolback II 600 mounted in the back
Claus is using his old CSM Mini Monitor as a temporary solution for the top.
The CSM is a Troels Gravesen construction with ScanSpeak 18W/8545 and Vifa XT25
Comments from Claus at this point:
"About the sound - it's much better than I would have thought because I haven't
made any measurements yet and only tuned the system by ear...!
I have made crossover points at 350Hz and 3kHz with 4th order Linkwitz Riley and made
some equalizing around 50-60Hz -3dB and also some damping of the tweeter.
As source I use my integrated amplifier Musical Fidelity A5 as preamplifier and Musical
Fidelity A5 CD-player. The records are played on an Alphason Sonata with HR100MCS arm
and Dynavector 10X5 cartridge"
My immediate impression is that the sound is more dynamic - in the sense that the grip
on the woofer is superb and the transient response in the music generally seems less
compressed and power will never be a problem.
I have no doubt about whether I am playing CD or record-player, so all in all, the results
exceeded all expectations"
"There is NO doubt that I have to make measurements when the system is finished. The
digital crossover is indeed a wonderland for fiddle-fingers (there are more combinations
than the lottery). So measurements are a must"
The continuation of Claus's excellent DIY project with new tops is here:
"At last" Claus says - he have finish his loudspeaker project and I got some very nice pictures
of the finished speakers. As mentioned earlier the Top enclosure will house a Mundorf AMT 2510 tweeter
and Accuton C90-6-078 mid-range. The Top box is as designing an aperiodic enclosure inspired by
Troels Gravesen's "Cyclops" - which attempt to minimize reflection at the back of the mid-range
membrane. The Tops are made the same way as the Bass boxes - multiple sandwich birch plywood.