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Alpine KTP-445A, Power Pack 4 Channel Amplifier for Alpine Receiver - 180 Watts
Not Available for Shipping Outside of the United States
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COMPACT
Compact size lets the KTP-445A fit where most amplifiers won’t. The KTP-445A comes equipped with direct plug-in connectors for select 2005 and newer Alpine head units and it fits behind the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. Its size and flexible wires make the Power Pack an easy choice to save space.
BEST SIGNAL-TO-NOISE CONTENDER IN ITS CLASS
In order to ensure that Alpine sound quality is heard, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.
Total Harmonic Distortion (THD+N) vs. Frequency
Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - <0.03% THD+N @ 1W, 1% THD+N @ rated power.
Number of Channels |
4 |
Class |
D |
Peak Power Rating (Watts) |
90x4 |
RMS Power Rating (Watts x Channels) - 4 Ohms |
45 x 4 |
RMS Power Rating (Watts x Channels) - 2 Ohms |
45 x 4 |
RMS Power Rating - Bridged | N/A |
Minimum Impedance Unbridged (Ohms) |
2 |
Minimum Impedance Bridged (Ohms) |
N/A |
THD at Rated RMS Power |
1% |
Bulit-in Crossover - Low Pass |
Yes |
Built-in Crossover - High Pass |
N/A |
High Pass Crossover Frequency (Hz) |
N/A |
Low Pass Crossover Frequency (Hz) |
N/A |
Signal-to-Noise Ratio |
80dB |
Bass Boost |
No |
Bass Remote Included |
No |
Fuse Rating | 15A |
CEA-2006 Compliant | Yes |
Maximum Power Wire Gauge Size | N/A |
Warranty | 1 Year |
Number of Channels |
4 |
Class |
D |
Peak Power Rating (Watts) |
90x4 |
RMS Power Rating (Watts x Channels) - 4 Ohms |
45 x 4 |
RMS Power Rating (Watts x Channels) - 2 Ohms |
45 x 4 |
RMS Power Rating - Bridged | N/A |
Minimum Impedance Unbridged (Ohms) |
2 |
Minimum Impedance Bridged (Ohms) |
N/A |
THD at Rated RMS Power |
1% |
Bulit-in Crossover - Low Pass |
Yes |
Built-in Crossover - High Pass |
N/A |
High Pass Crossover Frequency (Hz) |
N/A |
Low Pass Crossover Frequency (Hz) |
N/A |
Signal-to-Noise Ratio |
80dB |
Bass Boost |
No |
Bass Remote Included |
No |
Fuse Rating | 15A |
CEA-2006 Compliant | Yes |
Maximum Power Wire Gauge Size | N/A |
Warranty | 1 Year |
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to