Raquel,
Yes - I read your Singer anecdote - and noted the qualification.
However, the conditions of the comparison made that
comparison absolutely WORTHLESS.
So worthless - that it shouldn't even be brought up -
qualifications notwithstanding.
I reject your contention that there is one "way to go"
in audio system design - efficient speakers and relatively
low power amps.
Some well executed speaker designs, for example ribbons;
are inherently low efficiency and require high currents.
You can only make a permanent magnet so strong. A ribbon
driver has inherently a single turn in its "voice coil" -
so unlike dynamic drivers where the efficiency can be
increased by putting more turns in the voice coil - a
ribbon can't take advantage of that technique. With a
limited strength magnet, and a single turn - the only way
to get more output is the third term in the equation for
the Lorentz force - the current. The impedance must be
lowered to obtain more current. However, that means a
more powerful amp.
That approach is every bit as well considered as your
approach.
As far as the 300B being linear - ARE YOU KIDDING!!
Have you ever put a 300B on a test bench to determine
the linearity? I have - and I would NOT say that they
are champs in the linearity department.
One can make an amp that sounds very nice to those that
like the sound of the 300B, but please don't say it is
anything special when it comes to linearity.
Dr. Gregory Greenman
Physicist
Yes - I read your Singer anecdote - and noted the qualification.
However, the conditions of the comparison made that
comparison absolutely WORTHLESS.
So worthless - that it shouldn't even be brought up -
qualifications notwithstanding.
I reject your contention that there is one "way to go"
in audio system design - efficient speakers and relatively
low power amps.
Some well executed speaker designs, for example ribbons;
are inherently low efficiency and require high currents.
You can only make a permanent magnet so strong. A ribbon
driver has inherently a single turn in its "voice coil" -
so unlike dynamic drivers where the efficiency can be
increased by putting more turns in the voice coil - a
ribbon can't take advantage of that technique. With a
limited strength magnet, and a single turn - the only way
to get more output is the third term in the equation for
the Lorentz force - the current. The impedance must be
lowered to obtain more current. However, that means a
more powerful amp.
That approach is every bit as well considered as your
approach.
As far as the 300B being linear - ARE YOU KIDDING!!
Have you ever put a 300B on a test bench to determine
the linearity? I have - and I would NOT say that they
are champs in the linearity department.
One can make an amp that sounds very nice to those that
like the sound of the 300B, but please don't say it is
anything special when it comes to linearity.
Dr. Gregory Greenman
Physicist