Panasonic CYPA4003U 1000W 4-Channel Power Amplifier ( Refurbished )
Make a powerful audio statement with the 1,000-watt CY-PA4003U vehicle amplifier. The four-channel amp (250 watts x 4) is valued for its high efficiency--an essential trait when it comes to driving powerful car speakers over long periods. To maintain this efficiency, the CY-PA4003U employs full MOSFET circuitry with a low internal impedance and minimal heat generation. The circuitry both reduces the load on the car's battery and helps preserve the transparency and crispness of the original audio signal to ensure a faithful reproduction through the connected speakers. The amplifier also offers an "intelligent" bass servo circuit that adjusts to the limitations of traditional woofers. Compared to most midrange and tweeter drivers, woofers have a larger mass, heavier voice coils, and more inductance, thus they need more current to start moving. The increased current often causes the bass to lag behind the mid and high frequencies, resulting in unnatural tonal coloration. Furthermore, because of their longer throws, the woofers' voice coils have a tendency to deviate from pistonic motion, resulting in nonlinear dynamic distortion. The CY-PA4003's bass servo circuitry overcomes these shortcomings by feeding high current to the woofers at the moment of startup and instantaneously detecting and correcting the voice coil movements. This maintains the pistonic motion and linearity while helping the bass synch up with the rest of the frequency spectrum to produce a more authentic overall sound.
Though the CY-PA4003 is designed to drive four speakers, listeners can also bridge it for three-channel (two speakers and a subwoofer) or two-channel output (stereo), depending on their needs. To make the sub option more optimal, the amp also includes a low-pass filter that adjusts the cutoff frequency continuously from 50 Hz to 250 Hz. As a result, it's easy to upgrade to a subwoofer system that matches your speakers' low-end frequency limits.
Finally, the amp includes line-out jacks for easy expansion. The jacks let you connect multiple amplifiers--a must for power-obsessed listeners--while still keeping the wiring neat and tidy. Other features include gold-plated speaker terminals, a thermal shutdown protection circuit, and blue illumination. The amp measures 13.12 by 2.44 by 11 inches (W x H x D)
Product Specifications
4-Channel Class AB Car Amplifier RMS Power Rating: - 4 ohms: 64 watts x 4 chan.
- Bridged, 4 ohms: 190 watts x 2 chan.
Max power output: 225 watts x 4 chan. MOSFET power supply LED power/protection indicators Tuned Bass EQ (0-15 dB bass boost at 45 Hz) "Intelligent" Bass Servo Circuit (Results in bass that is more coherent with the rest of the frequency spectrum, achieving greater fidelity to the original sound)li> Versatile Bridgeable Amp (4/3/2 channel operation) Line-Out Jacks for Expansion CEA-2006 compliant amplifier Thermal shutdown protection circuit Gold-plated RCA Connectors Gold-plated Speaker Terminals Variable low-pass filter 50-250 Hz Variable high-pass filter 50-250 Hz CEA-2006 compliant amplifier Frequency response: 20-20000 Hz Dimensions: 13-1/8"L x 11-1/16"W x 2-1/2"H Power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together. 
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