Audiocontrol System90 model 48 extremely Rare OLD SCHOOL MADE IN USA

Description

The System90 combines a number of innovative and exciting, technologies into one compact, and you'll soon find, easy to install unit. Before you start installation, you should be familiar with just what's inside an AudioControl System90 Powered Signal Processor.
Bas restoration
Inside each Model 20 and Model 40 you'll find our
patented bass restoration technology, made famous by AudioControl's The Epicenter. This circuit detects harmonic artifacts, and then digitally restores the underlying bass, resulting in fast, tight, fundamentals.
No doubt you've found The Epicenter "remote". Frequency Bass Restoration
We'll address the use, and installation of this remote later in the manual. If you've already installed The Epicenter once or twice, this will be a piece of cake.
Electronic Crossover
State Variable All the System90's have built-in state variable electronic crossover
technology. The Model 20 incorporates a programmable, 18dB per octave, 2-way electronic crossover, while the Model 48 and Model 40 have two of the same. They are both programmable using plug-in modules. You may be familiar with these modules as they are the same as used in our 2XS, and 4XS crossovers. We'll expain this further in sections on individual models.
Programmable Frequency Match (PFM) Filter
You've witnessed the damage that sub-sonics can do to car audio systems. In addition, you know that they can rob amplifier power. The Model 20 and Model 40 has a built in l 8dB per octave filter to prevent this. It is programmable by plug-in modules the same as the programmable crossovers.
Audiocontrol System90 Model 48 SPECIFICATIONS
Unless otheiwise noted the battery voltage is 13.8VDC
Power output
40 Watts per channel into 4 Ohms 20-20Khz
60 Watts per channel into 2 Ohms 20-20Khz
110 Watts x 2 in bridged mode into 4 Ohms
22 Watts per channel int 8 Ohms
Power Bandwidth - 5Hz to 65Khz +O -ldB (amplifier section)
Distortion at rated power into 4 Ohms Less than .06% THD 20-20Khz
Input attenuation range - 18 dB Signal to noise -Greater than 100 dBA with 1 volt input
Damping Factor - Greater than 80 from 100 Hz to lOKhz
Slew Rate - 8 V /uS
Idle current - 850 mA
Standby current - 10 mA
Remote turn on current- 1.4 µA (microamps)
Soft start turn on delay - 2 - 3 Sec
Circuit Topology (power supply)- Power MOSFET PWM system
Circuit Topology (amplifier) Class AB bipolar amplifier with FET input stage and a complementary feed back pair output stage.
Line Level Sub Out Range Plus 6 minus 4 dB referenced to line level input signal