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The Alpine PDX-4.150 is a 4/3/2 channel density digital amplifier sporting 150 watts of power for 4 channels.

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Pros

small build profile fits neatly under the front seat

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works well with a wide range of speakers, good flexibility

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durable construction can take a few knocks without any problems

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outputs lots of power to your mains, will more than fill the car with sound

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installation is very easy, everything is accessible and obvious

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high quality sound output, lots of detail and richness

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Cons

generates a lot of heat, could burn you if used for a long time

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Edit

 

 The Alpine PDX-4.150 is a 4/3/2 channel density digital amplifier sporting 150 watts of power for 4 channels.  It shares a uniform size with the rest of the series (10-1/8" Width, 7-9/16" Height, 2-7/16" Depth) making it easy to expand the system and stack them to save space.  However, the Alpine PDX amplifiers cannot be installed in any manner other than parallel to the floor without voiding the warranty.  Some of its features include a 4-Layer glass epoxy PC board, a non-fading pre-amp RCA output, adjustable gain control, a speaker quick connect plug, a subsonic (infrasonic) filter, STAR topology, protection circuits, a power/status LED, a low pass filter, and the same power output for 2Ω  or 4Ω loads.  The Alpine PDX-4.150, like the others in the series, is CEA-2006 compliant, meaning it passed the new system of testing and measurement for mobile audio amplifiers.

Features
  • 150W x 4
  • Easy, flexible installation
  • 60% smaller than previous models
  • Same power output for both 2Ω or 4Ω loads
  • Stackable with any model in series
  • 10-1/8" Width, 7-9/16" Height, 2-7/16" Depth
  • 4-Layer Glass Epoxy PC Board
  • RCA Output: Non-Fading Pre-Amp Output
  • Adjustable Gain Control
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