[HAM] Single louver horn compartment damping material?

[Kon Zissis]

Hi William.
There is an apparent slight volume loss when I put the carpet damping
strips in the treble  compartment  but this volume loss is mainly
because the upper midrange and the treble is mellowed down so therefore
this slight volume loss is not a problem . Without the carpet damping
strips in place  the  sound of the treble horn reflects back from the
hard wooden surfaces inside the  treble compartment and  this causes the
upper midrange and the  treble response to be louder. Because the Jensen
V21 in my Leslie sounds quite bright, the mellowing effect  caused by
the carpet damping strips actually makes the V21 sound better because it
takes away some of the shrillness thus producing a warmer sound which I
prefer and I like the more direct sounding chorale and tremolo effect.
 
I have the Leslie back side facing  me on the right side of my C3 and I
normally have  the back  cover  removed when playing the C3 so that I
get the more direct  chorale and tremolo sound so this automatically
produces more volume than when the back cover is on even  when the
carpet damping strips are in place.
When I put the back cover  on  whilst the carpet damping strips are in
place then there is definitely  a noticeable mellowing effect and
although with the Leslie right next to me in my room this mellowing
sounds pleasant to my ears but if you  want to play on stage with
maximum projection of the sound then this will not cut through as well
and it may sound dull or muddy  from a distance.
 
The carpet damping  strips can easily be  put in or taken out of the
treble compartment  of my Leslie 122 depending on which particular sound
I want. I will not  be gluing or stapling them in place because I want
to be able to put them in or take them out but  I can secure them in
place by tying  them with  strings going between the louvres so that the
carpet strips do not fall out of their place and hit the treble horn
when the tremolo setting is on. 
All the best.
Kon
 
William Mark Bristow wrote:
>The material does have a slight difference in tonal response and
volume.
>When Bill Beer modified my 122's - he purposely took all of the damping
>material out of the Leslie to increase volume and resonance to the max.
>"Get all that stuff out of there - you really want the sound to barrel
out
>of there."  Was his answer when I asked him about it.
>My 760's had a felt / acoustic material on the back cover of the upper
rotor
>(which I removed for the sound reason).
>So it depends on the sound you want to produce.