Telonics PRE-200 Preamplifier 10
PB-008684 Rev A
FREQUENTLYASKED QUESTIONS
How and when do I use the Input Impedance control?
The input impedance control is used only when a direct connection from the pickup on your
instrument to the preamp input is desired (“3-wire hook up”). The volume pedal is then placed
in the PRE EQ EFX To/From (insert) on the rear panel for low noise control of the instrument
volume.
NOTE: Always set to maximum (fully rotated clockwise) if you choose NOT to use the PRE EQ EFX
To/From feature (“3-wire hook up”). This ensures the input will maintain proper high frequency
response.
To adjust the impedance control properly, start with the impedance control fully clockwise, and
then adjust all the preamp tone controls for the best sound. Only after adjusting the controls to
taste should you make slight adjustments to the impedance control. Rotating it fully counter-
clockwise will equal approximately 20 000 ohms (20 k ohms), which is equal to the impedance
of many conventional inexpensive pedals made for guitars. This is almost always too low for
steel guitars.
Setting the input impedance control to the twelve o’clock position makes the input impedance
approximately 150 000 ohms (150 k ohms), which is equivalent to the most popular or generally
accepted setting for steel and jazz guitar electronic or “light style” pedals.
A setting of full clockwise will approximate the old AB pot pedals which were 500 000 ohms
(500 k ohms).
Some musicians who have played for many years find their high frequency hearing response has
degraded. Musicians under these circumstances may feel this control does not appear to do
much or anything. In this case, it is recommended to just leave it set between positions 5 and 8
for the benefit of your listeners.
What’s a good setting to start with on the Preamp Gain control?
Between “4” and “6” is a good starting point. The Master Gain control delivers plenty of level
so be cautious in its use.
What are the frequencies covered by the Mid Freq control? Mid Level?
The “Mid Freq” control has a range from 250 Hz to about 1100 Hz. The range is scaled to values
of, 250, 275, 300, 350, 400, 500, 600, 800 and 1000 Hz. The “Mid Level” control adjusts from
-16 dB cut at full CCW position to a +16 dB boost at full CW position.
What does the Blend control do?
This control is used as an overall tone control to be used only after setting the other tone controls
to your satisfaction. Rotating the knob clockwise yields a brighter more aggressive tone and
counterclockwise results in a mellower, warmer tone. Straight up (zero) yields no change.
What’s a good setting to start with on the Master Level control?
Five is a good place to start. The Master Level control delivers plenty of level so be cautious in
its use.
