DESIGN FEATURES
The MC140x is conservatively rated at
140
watts. This power can be divided into: Four
channels
(4
x 35 watts), Three channels (2 x 35 watts, 1 x 90 watts), Two channels (2 x 90
watts).
The MC245 is conservatively rated at 240 watts. This power can be divided into; Five
channels (4 x 35 watts, plus 1 x 100 watts), Four channels (2 x 35 watts, plus 1 x 90 watts,
plus 1 x 100 watts), Three channels (2 x 90 watts, plus
1
x
100 watts).
The design topology of both amplifiers utilize multiple
Darlington
output devices with a total
output capability five times the total rated output of the amplifier. With such reserves and no
current limiting, both amplifiers operate without strain even at maximum output. Power,
ground, and speaker connectors are rated to handle up to 80 amps and accommodate up
to 8 gauge stranded cable. To prevent potentially damaging turn-on and turn-off thumps, a
built-in delay circuit allows these amplifiers to fully stabilize before sending the audio signal
to the loudspeakers.
The MC
140x/245
provide superior, non-intrusive protection from overheating in two ways:
First, the Soundstream “Chassisink” has been custom designed to guarantee the lowest
_
possible thermal resistance (maximum cooling), greatly reducing the possibility of over-
heating. Secondly, if this should occur, all Soundstream amplifiers incorporate our “Smart
Power Supply”
which temporarily modifies the power supply’s operating parameters,
allowing the amplifier to run much cooler. Full output capability is restored once the
amplifier returns to normal operating temperature. This entire process is automatic and
inaudible.
In the case of an actual amplifier malfunction, secondary fuses will shut down these
amplifiers in a conventional manner.
Only
premium parts are used, such as 1% metal film
resistors, gold-plated input connectors, double-sided masked glass epoxy circuit boards
and immersible sealed potentiometers. Input sensitivity is
adiustoble
to match any tuner/
deck, these amplifiers can even be interfaced with most OEM speaker level signals. Both the
MC140” and MC245 incorporate built-in Staggered Asymmetrical Electronic Crossover.
The high pass crossovers are set at 18OHz with a slope of 6dB per octave. The low pass
crossovers are set at 75Hz with a slope rate of 12dB per octave. By selecting two staggered
frequencies, a dip in the acoustic response is created, which is most useful to compensate for
common vehicle response peaks between these
two
fixed
points.
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