Owner`s manual

9
Ayon Audio – Hart 18 – 8101 Gratkorn – Austria – Phone: [phone]
www.ayonaudio.com
Note: NEVER REMOVE THE BOTTOM PLATE OF THE TYPHON BEFORE UNPLUGGING THE UNIT FROM
THE WALL!
6. Grounding
Make sure that Typhon monoblock’s are grounded to your wall ground first.
If there is a hum loop (hum audible from more than a few inches from the loudspeakers) flip the
grounded/ungrounded switch. If the hum doesn’t disappear then use a two prong plug to
“float” one monoblock first and if it is necessary then “float” the second one too.
Due to the amplifier’ high power rating, it is important to assure the good quality power line for
each channel. If separate circuit outlets are used for left and right channels, it is recommended
that both circuits be connected to the same phase of the power line. Otherwise, a high level of
hum can be present.
7. Bias adjustment – important!
The output power tubes need to be “biased” with a grid voltage that controls the flow of
electrical current through the tube. Tube biasing on the amplifier has been designed to be
both simple and effective. The bias is set individually for each tube so that the correct
operating point is assured. An added benefit to this approach is that, should a tube fail
prematurely, the single tube can be replaced without having to purchase a matched set.
Use the following procedure to set the tube bias:
Adjust the Bias via potentiometer: Bias1, Bias2, Bias3 and Bias4.
The current value will be displayed of the electrical current running through the 6C33 tube.
The correct value should be approximately 70mV ( Bias meter )
Adjust bias 1: switch bias selector to bias 1 position.
Adjust bias 1 with potentiometer to 70mV.
Adjust bias 2: switch bias selector to bias 2 position.
Adjust bias 2 with potentiometer to 70mV.
Adjust bias 3: switch bias selector to bias 1 position.
Adjust bias 3 with potentiometer to 70mV.
Adjust bias 4: switch bias selector to bias 2 position.
Adjust bias 4 with potentiometer to 70mV.
Important: Please check the bias voltage several times during the first 20 minutes of warm up
and adjust if necessary to the recommended value.
Important notice for new tubes or new amplifier: When using the amplifier for the first time or
after any exchange of the 6C33 tubes, the bias voltage for the 6C33 tubes should be set to
around 40mV and the amplifier should be run with this value for some hours to allow for a
smooth initial run-in of the tubes. After completion of this "warm up" phase, the bias should be
slowly increased towards the optimal value of 70mV. A new 6C33 tube is known for its tendency
to let the bias rise slowly but continuously.
bias meter