built by Rafal/Poland
I wanted to share with you final outcome of taking CNO2
1/2 design and implementing it on my own. I was thinking
very long on taking final decision which design will
satify me most. I went through many many designs already
using some of Polish Tonsils then also some Vifas,
Morels, Peerless etc.
Finally decided to go for paper cones, light weight
having in mind that bass performance will be different
but midrange and highs will be beautiful. What was also
important was the look of those speakers :) They are just
Bought CNO-25 speakers set with T29CF0002 tweeters and
started the cabinet construction.
Cabinet was though one as everything was hand work as it
was not easy to get access to the CNC machine. I followed
your recommendation for the construction of the cabinet,
damping, chamfering etc. Good piece of advise I really
Crossover was not so straightforward. I took some coils
for the tweeters that had better resistance parameters.
Unfortunately it ended up with higher sensitivity of the
tweeter and uneven frequency response. Just applied
bigger resistor doing some measurements and everything
General remark: Speakers are great - real top class BUT
not from the first hours of playing.... It took half a
year to reveal real potential of those speakers. Bass
response significantly improved, midrange sounds nicer.
This should be important for future builders - do not
give up when running those speakers for the first time -
wait for sound to come.
Finishing: took as much time as buiding. Hand work again.
Was using veneer and a super MOMENT glue. Then I tried
the oldest known method of finishing - I used wax to give
the speakers the final look. I must admit that the result
is beautiful and what is the most important they look
different from anything I saw on the retail market.
I really appreciate your effort in building the page and
your kind support via email. Thank you once again. I
think the next step will be moving to high efficiency
Rafal / POLAND