6
Connecting the input signals channel 3 and 4:
Inputs for channel 3 and 4 are symmetrical jacks ¼" with a nominal input sensitivity of –10 dBu, where
you can connect additional signals (such as CD player, sequencer, click signals, etc.). Press key Mono
for channel 1-2 at the front side when you want to hear a mono signal at both sides of the earphones.
If you want to hear the click signal supplied only at the right side, plug it into the input channel 4.
If you want to hear the click signal only at the left side, plug it into the input channel 3.
There is also the possibility to connect completely different signals at channels 3 and 4 (e. g.
sequencer and click). When you want to hear these two signals at both sides of the earphones, press
key Mono for channel 3-4 at the front side. The volume ratio of the two signals can be adjusted with
the balance control of channel 3-4.
OPERATION OF THE DRUM INEAR AMP:
Adjustment of the optimum working level:
When all required connections are made and the Drum Inear Amp is switched on, make sure that the
input signals have contact with the Drum Inear Amp. Turn channel 1-2 volume control until the signal
OK LEDs light; then you have the optimum input level. When you have connected input signals at
channel 3-4 as well, also turn channel 3-4 volume control until the signal OK LEDs light. When no
signal OK LED lights at the right stop (maximum) of the volume control, increase the level of the
connected input signal at the signal source.
When the red clip LEDs light, decrease the level at the input volume controls of channel 1-2 or channel
3-4, respectively, as otherwise the limiters respond, and the dynamic range is restricted extremely.
Adjustment of the earphones/headphones volume:
Connect your earphones with the phones output jack at the front. Any headphones system with an
impedance greater or equal 16 Ohm can be connected at this jack. If your headphones system has an
1/8" stereo jack connector, use the adapter supplied with the Drum Inear Amp.
Now adjust the volume which is agreeable to you with the volume control (Phones-Out).
IMPORTANT: Only use stereo headphone systems with 3-pole jack connectors.
Adjustment of the intensity of the bass shaker:
Sit on the drummer throne and set the bass shaker's volume control to an intensity which is
convenient for you compared to the headphone volume. The characteristics of the bass signal can be
adjusted by means of the cut-off frequency control of the bass shaker output. The more you turn the
control in clockwise direction, the higher frequencies are output to the bass shaker (up to max.
200Hz). The adjustment you select can completely depend on your personal taste. Fischer Amps,
however, recommend a cut-off frequency of approx. 80 Hz.
BLOCK DIAGRAM:
(see page 7)
Summary of Contents for DRUM INEAR AMP
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