Still
Building Them by Myself
Yes,
I’m still building them by myself,
except for some occasional help from my
son, Colin.
The
F5 Power Amplifier has finally made it
to production. It’s a two channel
25 watt design with two direct coupled
FET stages operating Class A. In a stable
of completely different amplifiers, this
is another different amplifier.
Check
out the F5 DIY article, or the F5 Owner’s
Manual (which includes that article) You
can see it in the May Issue of AudioXpress,
and you can download it here.
Coming
Soon:
The
B1 Buffer Preamp will be available in
a matter of weeks. It is configured as
a “passive” selector and volume
control, but with a no-feedback JFET buffer
that offers ultra low distortion and noise
with ultra wide bandwidth. If passive
preamps have not floated your boat in
the past, you need to check this one out;
it resolves several interface issues that
have limited the popularity of passives.
The
B2 Biamp Buffer. You say you tried bi-amping
but didn’t get sound you wanted?
The B2 uses two pairs of the buffers found
in the B1 but configured for splitting
the output of the preamp with variable
relative gain to two sets of power amplifiers.
This allows not only isolated amplifier
impedance buffering, but adjusts the gain
levels for different amplifiers. Even
for identical amplifier channels it also
allows the subtle adjustment required
to get exactly the top/bottom balance
you need.
B3
Preamp. Maybe you’d like a B1 but
you need some gain.
The
B4 Crossover / Equalizer has been designed
around the needs of full range speakers
(Lowther, Fostex, and all the newer entries).
It has circuitry for equalizing to the
needs of full range drivers and for adding
a woofer.
