Adiustina the Gain
1. Turn the gain control on the amplifier all the way down.
2. Turn up the volume control on the source unit to
approximately 3/4 of maximum.
3. Adjust the gain control on the amplifier until audible distor-
tion occurs.
4. Adjustthe gain control down until audible distortion
disappears.
5. Follow steps 3-4 for other gain control settings.
(THUNDER42441
6. The amplifier is now calibrated to the output of the
source unit.
Definitions of
Common Terms
The following /isi of terms with their definitions is offered as
help in understanding the set-up and operation of your
amplifiec
1. Crossover (xover) - an electrical filter with high-pass or
low-pass characteristics that divides the frequency range
into playable bands for certain speakers. Subwoofers, mid-
bass, midrange and tweeters are all designed to play differ-
ent frequencies and should do so to avoid damage. The
xover point is where the playable frequencies cross from
one speaker to the next at -3dB below reference level.
2. Fall-range - refers to signals which cover the entire audio
frequency span from 20Hz to LOkHz.
3. High-pass - simply put, this blocks lower frequencies
which damage smaller speakers, and passes the higher
frequencies for smaller speakers like the midrange and
tweeter.
4. Low-pass-You got it, this is the inverse of a high-pass. It
blocks higher frequencies and passes the playable lower
frequencies to the larger speakers, like subwoofers.
Iv&Cal Smzaker
Wiring
Confiuurations
Stereo Amplifier
Bridge Mode Application
Impedance Requirement
4 ohm bridge minimum
2 ohm stereo minimum
5. Impedance - the resistance to the flow of current in an
alternating current circuit (such as with music). Line level
circuits are typically a high impedance of several thousand
ohms, while speaker level circuits are usually a low imped-
ance of a few ohms.
6. tine level - The type of signal produced at the outputs of
tape decks, CD tuners, preamplifiers, etc., with a D/pica1
value of a volt or less in a high impedance circuit.
7. Speaker level - The h/pe of output that is meant to drive
speakers. These signals are sometimes called high level
and are usually connected by two conductor speaker wires.
8. Signal - The signal of an audio system is what is heard
from the speakers. These signals may be high pass, low
pass or full-range.
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