|
Specially selected and matched 23AT7/12AX7 for critical
audio or guitar/bass amplifier use |
|
where a match of the two sides of the triode are
desired for phase inverter or driver use. |
|
|
|
Preamp: |
|
Use of a 12AT7 in
place of a 12AX7 will yield more clean headroom in your output
section. |
|
The two tube types
are interchangable without any adjustment required, so feel free to
experiment! |
|
Matching is not necessary in a preamp, BUT is highly recommended in
a class A/B poweramp! |
|
|
|
Poweramp: |
|
The
upper and lower portions of the output waveform will be much more
equal. |
|
When this waveform
is not equal, differences are cancelled out and are |
|
noticed as a lack
of sustain or apparent "dead spots" in areas of the fret board. |
|
In-depth tech article
here. |
|
|
|
SAG: |
|
SAG = Special
Application Group. |
|
Specially
selected from premium Groove Tubes preamp tubes. |
|
Testing and grading
for certain performance characteristics. |
|
Limited availabilty. |
|
|
|
"Concerning tubes a matched
phase inverter is probably the most overlooked
issue. |
|
Benefits of a MPI is technically explainable,
let your ears decide if it's true.
|
|
We use
matched phase inverters
exclusively
in our amps!" (GtrGear) |
