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7
Setting Up and Using Your Hartke A
SERIES Combo Bass Amplifier
Setting up your Hartke Systems A Series Combo Bass Amplifier is a simple
procedure which takes only a few minutes:
1. Remove all packing materials (save them in case of need for future service)
and decide where the amplifier is to be physically placed. You may decide to
use the “kickback” position for additional directionality and high frequency clari-
ty. To avoid potential overheating problems, make sure that the rear panel is
unobstructed and that there is good ventilation around the entire unit.
2. Before you plug-in the power cable, be sure the Power switch is in
the off position. Connect the supplied power cable to the AC inlet
located on the rear panel. Then, plug-in the 3-pin AC plug into any
grounded AC socket. Don’t turn the A Series on just yet, though.
3. Use a standard music instrument cable to connect your bass to
the Input jack on the front panel. The A series Input has been
designed to handle the signal from most any bass guitar. So,
whether your bass has passive electronics (that is, if it has no battery), or
active electronics (that is, if it has a battery), plug right in.
4. On the front panel of the A Series, turn the Volume and Limiter control to
their minimum (fully counterclockwise) position, set all four EQ controls to
their “0” position.
5. Press the front panel Power switch in order to turn on your A Series amp;
the LED in the switch will light up.
6. Set the output of your bass to maximum and then, while playing, slowly
turn the A Series Volume control up until the desired level is achieved. It’s
nearly impossible to overload the A
Series amplifier, so if you hear distor-
tion even at low Volume settings,
check for a faulty cable (if it’s good,
simply back off the output of your
bass).
7. Adjust the four equalization con-
trols to taste. (When you get a great
setting that complements your instru-
ment and playing style, it’s a good
idea to write it down for future use.)
8. Now try out the A 25 / A35 limiter circuitry. Activate it by turning the
Limiter knob clockwise from its “Zero” position. As you turn the knob clock-
wise, the input signal from your bass becomes more and more severely
compressed—you’ll hear peak signals (such as string slaps and pulls)
begin to sound increasingly “squashed,” relative to the lower-level signals
produced by standard playing. The result will be a decreased dynamic
range but an overall leveling of signal throughout the full pitch range of your
instrument. In the A25 and A35, the Limiter LED will light steadily green