Typical Woring Configurations; Adjusting The Gain; Definitions Of Common Terms - MTX Thunder4122 Owner's Manual

A d i u s t i n a t h e
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. Adjust the gain control down until audible distortion
d i s a p p e a r s .
5. Follow steps 3-4 for other gain control settings.
(THUNDER42441
6. The amplifier is now calibrated to the output of the
source unit.
D e f i n i t i o n s
C o m m o n
The following list of terms with their definitions is offered as
help in understanding the set-up and operation of your
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. Full-range - refers to signals which cover the entire audio
frequency span from 20Hz to 20kHz.
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.
G a i n
o f
T e r m s
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 type of signal produced at the outputs of
tape decks, CD tuners, preamplifiers, etc., with a typical
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.
We don't have enough space for Electronics 101, so if you
have a good, bad or amusing question, p/ease call us TOLL
FREE at &JO-CALL-MTX! (800-225-5689)
S n e a k e r
C o n f i a u r a t i o n s
Stereo Amplifier
Bridge Mode Application
Impedance Requirement
4 o h m b r i d g e m i n i m u m
2 ohm stereo minimum