Aafiustina the Gain
1. Turn the gain controls 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 one gain control on the amplifier until audible
distortion occurs.
4. Adjust that same gain control down until audible
distortion disappears.
5. Follow steps 3-4 for other gain control settings.
6. When the Thunder 6152 and 8302 is bridged, adjust only
the left channel gain control.
7. The amplifier is now calibrated to the output of the
source unit.
Definitions of
Common Terms
The following list of terms with their definitions is
offered as help in understanding the set-up and oper-
ation of your amplifier.
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 speakerto the next at -3dB below reference level.
2. Full-range - refers to signals which cover the entire audio
frequency span from 20Hz to 2OkHz.
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.
Tvroical SD,eaker
Wiring
Confirrurations
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. line level - The D/pe 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 type 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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