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PDX Audiophile Amplifiers


4 Channels + Mono Power Density Digital Amplifier


Not available online


This audiophile range of PDX series amplifiers are designed and engineered for ultimate sound quality, power, performance and reliability. These sleek and stylish amplifiers have been re-designed from the ground up to deliver an amplifier range that not only look amazing, but perform flawlessly.

Incorporating new technology to maximise sonic quality, the new PDX amplifiers deliver extremely low distortion levels, wide bandwidth and industry leading S/N ratios. The new PDX amplifiers have an exceptionally high damping factor, more than 500 for the multi-channel PDX-V9. What’s more, the all-new PDX amplifiers are 20% smaller than the first generation models and their unique stacking design allows for a large multi amplifier system to be installed virtually anywhere.

These new PDX amplifiers are for the true car audio enthusiast, providing exceptional sound quality and performance.


PDX Audiophile Series V9
The PDX Audiophile series are the first ever class-D amplifiers to triumph sound purity and power efficiency. With precision design and UltraBlu technology PDX deliver unsurpassed definition. The PDX-V9 Power Density Amplifier is 50% more powerful than the previous PDX-5, while remaining extremely slim and compact. It can deliver a maximum of 1600W of reliable power and 100W x 4 or 200W x 2 (RMS), plus 500W mono (RMS). Plus, exactly the same power is available with a 4-ohm or 2-ohm connection. The improved power supply ensures highly efficient operation at all power levels and loads, and it also has a new Dynamic Power Management System that maintains stable output under all conditions. In every measurable category, the PDX-V9 sets a new standard of excellence. It achieves amazing performance in terms of wide bandwidth, low noise, low distortion, high damping factor, minimal phase shift and inaudible crosstalk. The PDX-V9 offers outstanding flexibility, so it can be perfectly integrated into various system configurations. In addition, all cables can be quickly and easily connected, even power supply cables.

PDX-V9 Outstanding System-Building Flexibility
The PDX-V9 gives you the flexibility you need to meet any customer request. In addition to the normal 4.1-Channel system, this amp makes it easy to create an active front 2-way + Subwoofer system, a bridged connection system or a 2.1-Channel system. What's more, the Selectable Input Channel Switch lets you change the number of input channels, making 5- or 4-Channel output possible with only 2-Channel input.

PDX Ultra-Wide Frequency Response
This super-wide, industry leading frequency range offers listeners unparallel sound quality and detail that bests even the most high-end audiophile equipment. 5Hz-100kHz for 4ch, 5Hz-400Hz for Mono (+0,-3dB).

PDX Total Harmonic Distortion (THD+N) vs. Power
The all-new PDX series amplifiers are not your typical class-D amplifiers. Traditionally, class-D amplifiers have not been known for both low distortion and wide frequency response. These new PDX amplifiers are the first ever class-D amplifiers to break tradition and trump the amps of yesterday. The PDX-M12, PDX-M6, PDX-F6, and PDX-F4 are synonymous with extremely high resolution and detail.

PDX Total Harmonic Distortion(THD+N) vs. Frequency
Uniquely PDX, distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. -Read more

PDX Signal to Noise
These amps are capable of unheard of S/N ratios up to 95dB S/N @ 1W, 122dB S/N at rated power for extremely clean, uncoloured sound. Forget unwanted background noise or static. The PDX amps deliver crystal clear music every time.

PDX Damping Factor
With ultra-low output impedance, the new PDX offers extremely controlled, tight bass for unprecedented sound quality. Ratings are >1000 for Mono and >500 for 4ch.

PDX Beefed Up Power
The PDX power supply delivers tremendous headroom with low distortion and noise. PDX amplifiers have an extremely high total system efficiency of ~80% (power supply is rated at >90%, output stage is rated >90%).

PDX Low Impedance Stability
These amps are stable at low impedances and are capable of their rated power from 2 to 4 ohms for all models. This allows excellent flexibility with multiple speaker and subwoofer loads and is adjusted automatically.

PDX Certified Power From Birth, Guaranteed
Each PDX amplifier comes with its very own birth-sheet. PDX amplifiers are tested and documented to show their true actual output.

PDX Power Management Processor
PDX amps incorporate Alpine's new Power Management circuit. The Power Management Processor controls all aspects of amplifier performance, monitoring voltage, temperature and output to ensure uninterrupted power output for non-stop listening. If the amp gets too hot, the Thermal Protection circuit kicks in and gradually decreases output power until it cools down. Once cool, the power output automatically increases back to the previous level. If the circuit detects a Low Battery condition, it will gradually decrease power output if battery voltage becomes too low. Once the battery voltage increases, power will be restored. This interruption-free design allows for non-stop enjoyment with no hiccups or drop-outs, just clean, clear output.

PDX Unique Stacking System
The new PDX series amplifiers are 20% thinner than previous models at only 2î thick. New stacking system packs the amps closer together so there are no gaps and to save space in the trunk while directly coupling the amps heatsinks to help share cooling duties.

PDX Speaker Terminals
The super high power speaker connectors allow for up to 8GA wiring and have a unique quick disconnect design for simple error-free installation

PDX Power Connector
The new removable connector features a low-loss, high-current design. It accepts up to 4GA wire, to ensure your amp gets the power it needs while allowing for easy installation.

PDX Trim Personalisation
PDX amplifiers come with removable trim rings, allowing them to be easily custom painted to match your vehicle or personalized to anything you want. Add it as another Do-It-Yourself project, or leave it to professionals and ask an Authorized Alpine retailer/installer near you

Remote Control Bass Knob (RUX-KNOB)
Simply add the RUX-KNOB (sold separately) and get full control from the dash for instant bass adjustment. You also get the ability to control multiple amps from just one controller with simple telephone cord adapters. Only for mono and 5 channel amps.

Metal-Oxide Semiconductor Field Effect Transistors have higher switching speeds than ordinary FETs, for faster response, better linearity



  • Connectors: Quick Connect Terminals for Power Supply and Speaker Output
  • Terminal Layout: One-Sided
  • Mounting Design: Easy Stacking and Smart Installation



  • Amplifier Type: Class-D (Digital)
  • Channel Design: 4-channel + 1-channel (Mono)
  • Power Supply Design: DC-DC PWM Power Supply
  • Pre-Amp Stage: Discreet
  • Final Outputs: MOSFET
  • Crossover: Variable High Pass, Low Pass and Band Pass Filter
  • Gain Control: Continuously Adjustable Gain Control
  • Subsonic Filter: Variable Subsonic Filter
  • Bass Control: Remote Bass Control (RUX-KNOB) Ready
  • Low-battery Protection
  • Low-impedance Possibility
  • Current Protection: Over-Current, Over-Voltage and Thermal Protection
  • Board Circuitry: S.T.A.R. Circuit
  • Board Design: 6-layer Glass Epoxy PC Board
  • Power Indicator: Top Mounted LED Power/Status Indicator
  • Input Channel Mode Setting (CH1/2 & CH3/4): Input Channel Mode Setting (CH1/2 & CH3/4)
  • Input Channel Mode Setting (Subwoofer): Input Channel Mode Setting (Subwoofer)
  • Thermal Control: Thermal Management Control


CEA-2006 Power Ratings

  • CEA-2006 Power Rating: 100W RMS x 4 + 500W RMS x 1 (4-ohm/2-ohm, 14.4V at <1% THD+N)


Max Power Output Ratings

  • Max Power: 1600W


RMS Power Ratings

  • Per channel into 4 Ohms: 100W RMS x 4 + 500W RMS (4-ohm, 14.4V <1%THD+N)
  • Per channel into 2 Ohms: 100W RMS x 4 + 500W RMS (2-ohm, 14.4V <1%THD+N)
  • Bridged 4 Ohms: 200W RMS x 2 (4-ohm, 14.4V <1%THD+N)


Sound Tuning

  • Crossover Frequency (CH1/2, HPF): 30 – 600 Hz (x1), 300 – 6k Hz (x10), -12 dB/oct.
  • Crossover Frequency (CH3/4, HPF): 30 – 600 Hz (x1), -12 dB/oct.
  • Crossover Frequency (CH3/4, BPF): 30 – 600 Hz (HPF), 300 – 6k Hz (LPF), -12 dB/oct.
  • Crossover Frequency (Subwoofer): 50 – 600 Hz, -24 dB/oct.
  • Subsonic Filter: 3 – 30 Hz, -24 dB/oct.



  • Foot Print (WxHxD) mm: 257 x 50.8 x 192 mm
  • Foot Print (WxHxD) in: 10-1/8” x 2” x 7-1/2”



  • Power Requirements: 14.4 V.DC (11-16 V allowable)
  • Input Sensitivity (RCA Input): 0.2 – 4 V (CH1/2, CH3/4), 0.1 – 4 V (Subwoofer)
  • Input Impedance: >10k ohms
  • Frequency Response (+0, -3dB: 1W into 4 Ohms):
    • CH-1/2/3/4: 3 – 100k Hz
    • Subwoofer: 3 – 600 Hz
  • THD+N (10W into 4 Ohms):
    • CH-1/2/3/4: <0.005 %
    • Subwoofer: <0.006 %
  • THD+N (Rated Power into 4 Ohms):
    • CH-1/2/3/4: <0.03 %
    • Subwoofer: <0.05 %
  • Damping Factor:
    • CH-1/2/3/4: >500 into 4 ohms at 100Hz
    • Subwoofer: >1000 into 4 ohms at 100Hz
  • Signal to Noise (Rated Power into 4 Ohms):
    • CH-1/2/3/4: 112 dB
    • Subwoofer: 119 dB
  • Weight: 2.7 kg
    *Note: Specifications and design are subject to change without notice.

Expand Your System

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