I thoroughly agree with not using a Standard speaker to play valuable brown wax. It was intended to record and play back on blank cylinders and not intended for playing factory recordings. Standard speakers are rarely adjusted perfectly so there is a high probability that they will damage your records
That exact scenario can be reproduced at the present time
by the use of newly made brown wax blanks.
When using those, the phonograph can be used as
originally intended in that recordings can be quickly
made and played back. In that scenario, the need for
exacting care such as is required when dealing
with/preserving valuable ancient and very rare recordings buried in mold on an old channel rim cylinder is not even an issue.
This is why I took the time and actually bothered to
reconstruct as best that I can, the procedure for
making brand new brown wax blanks.
The goal there was to produce blanks which are
sensitive enough to cut well in a typical temperature
range experienced by most folks who would attempt
to record cylinders at home. The goal was also
to meet or exceed the original Edison blanks
in all general performance standards.
That was a lofty goal, because Edison did set
that bar rather high.
Those standards include minimum surface noise,
complete lack of any internal defects such as pits,
or bubbles. All annoying internal defects commonly
seen in brown wax such as streaks and any other
common forms of separation of the suspension during
cooling have been eliminated in this process.
To back up these lofty claims, each blank has
a serial number to identify it. Each blank comes
with an unconditional guarantee against any
defects.
So, while we are on this subject, for those
who would desire to record and play back brown wax
recordings using period equipment, there are brand new
brown wax blanks available which are in every way
as good or better than the originals.
The availability of these obviates any perceived
need to shave rare ancient recordings.
Chuck