Old School Alpine 3553 Duo-B - Car Audio Classifieds!
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Old 04-13-2013, 06:43 PM
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Default Old School Alpine 3553 Duo-B

Amp Name:

Alpine 3553

Specs:

Code:
* 4/3/2 CHANNEL OPERATION: The 3553 can be used as: 
a. 4-channel amplifier, producing 35W per channel into 4ohms, or 50W per channel into 2ohms. 
b. 3-channel amplifier, producing 35W(4ohms) or 50W(2ohms) into channels 1 & 2 and 100W(4ohms) into the third channel. 
c. 2-channel amplifier, producing 100W per channel into 4ohms. 

* STATUS MONITOR: 
This indicator illuminates in green when the amplifier is on and operational. This light will turn to orange if any internal protection circuitry is activated. 

* ACTIVE DIVIDING NETWORK: 
A pair of built-in, switchable and independent electronic crossover network at 80 Hz, 18dB per octave, can be used to set up the amplifier for low-pass (tweeter/midrange satellite) application. 

* ACOUSTIC COMPENSATION CIRCUITRY: 
A selectable(Off or On) equalization curves can be added to the amplifier's output signal, compensating for the inherent non-linearities of the automobile interior. It extends low bass response and eliminates mid-bass boominess, giving the low frequency response of the audio system tightness and accuracy. 

* DUO-B FEEDBACK CIRCUITRY: 
This stabilizes the amplifier, removes DC offset, and offers excellent total harmonic distortion(T.H.D.) characteristics. It also provides low T.I.M., excellent slow factor, stability, and musicality. 

*NO CURRENT LIMITING: 
Absence of current limiters in the audio section ensures low T.I.M. excellent transient response, and superb sonic quality. 

* S.T.A.R. CIRCUITRY: 
The Alpine-developed Signal Transit for Accurate Response circuit topolgy improves sonic properties by reducing interaction between different sections of the circuitry. 

* INPUT MODE SELECTOR: 
This switch allows the user to specify the input signal entering the amplifier. Among other benefits, it eliminates the need for RCA-type Y-adaptors when bridging the amplifier. 

* INPUT CHANNEL SELECTOR: 
This switch allows the user to specify the input signal entering the higher power CH3 and CH4 of the amplifier. 

* DC-TO-DC SWITCHING MODE POWER SUPPLY: 
Provides excellent power output throughout the audio band-width(20Hz to 20kHz). It's soft clipping characteristics ensure superb transient response and musicality. 

* FULLY DISCRETE, COMPLEMENTARY OUTPUT CIRCUITRY: 

* INDEPENDENT, CONTINUOUSLY ADJUSTABLE GAIN CONTROLS FOR CH1/2 AND CH3/4: 

* GOLD-PLATED, SCREW-DOWN POWER AND SPEAKER TERMINALS: 

* HIGH PERFORMANCE, LOW NOISE, AUDIOPHILE QUALITY ACTIVE AND PASSIVE COMPONENTS: 

* THIRD ORDER(18dB PER OCTAVE) CAPACITIVE/INDUCTIVE POWER SUPPLY INPUT AND OUTPUT FILTERING: 

* EXTRA HEAVY DUTY CONSTRUCTION:
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