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Telonics TCA-500C Combo Amp
39
PB-009289 Rev E
F
REQUENTLY
A
SKED
Q
UESTIONS
What’s a good setting to start with on the Gain control?
An initial setting of “3”is a good starting point. The Input Gain control delivers plenty of level
so be cautious to avoid the red overload (“clipping”) LED from coming on.
What are the frequencies covered by the Mid Freq control? Mid Level?
The “Mid Freq” control has a range from 375 Hz to about 1400 Hz. The range is scaled to values
of, 375, 400, 500, 600, 700, 800 and 1400 Hz. The “Mid Level” control adjusts from -20 dB cut
at full CCW position to a +5 dB boost at full CW position.
What does the Blend control do?
This control is used as an overall “fine” 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?
A setting of “5” is a good place to start. This level will be determined by the size of the room
you are playing in. The Master Level control delivers plenty of level so be cautious in its use.
What kind of headphones should I use?
Use low impedance (35-60 ohm) stereo closed or open style depending on personal preference.
Sony MDR 7505 headphones are recommended for best fidelity.
Can I drive speakers with the headphone jack?
No, only use it for headphones. It was designed for headphones. The preamp will deliver up to
half a watt per channel into eight ohm from its internal stereo headphone amp.
What does the red LED overload indicator show?
The
Overload LED
shows when the preamp enters (or is about to enter) soft clipping. Although
you might see it light up on rare occasions, you’ll probably never hear the difference.
This LED
indicates an overload on the input or equalizer circuits. Reduce gain or adjust EQ of input to eliminate
blinking.
Tell me about the Tuner Out function.
The Tuner Out jack has a buffer stage and circuitry which isolates the output of the tuner from
the rest of the circuitry eliminating a common source of external noise sometimes emanating
from some tuners. This circuit will not load down other circuitry in the TCA-500C. The Tuner
Out can also be used as an effects Send.
What does the Mute button do?
When engaged, the mute function allows the tuner, headphone amp, and effects send and return
to remain On while the preamp out and XLR direct out feed are disabled. This way you can
practice at home or in between songs on stage without your power amp On and still get a stereo
feed to your headphones complete with stereo effects. Use it to mute your output while
changing a string, tuning up, running through upcoming licks or adjusting the effects unit.
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