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Alpine SPX-137R

5-1/4" 2-way Type-X Series Component System

Alpine
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5-1/4" 2-Way Component System • Power Handling 240 watts Peak / 60 watts RMS • Frequency Response: 40 Hz - 60 kHz • Sensitivity: 86 dB •

Learn more about the spx137r

Good news and a little bad...

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Description


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Authorized dealer

  • 5-1/4" 2-Way Component System
  • Power Handling 240 watts Peak / RMS 60 watts
  • Frequency Response: 40 Hz - 60 kHz
  • Sensitivity: 86 dB
  • Impedance: 4 Ohm
  • Custom Cast Aluminum Frame
  • Airflow Optimized Dual-Flare Pole Vent
  • Integrated Spider Landing & Heat Transfer Plate
  • Low Resonance Multi-Roll Surround
  • Wood Fiber Cone
  • Phase-Integrated Dustcap
  • Ultra High Quality 2-way Crossover
  • On/Off Axis Compensation
  • Bi-Wire Input and Selectable Tweeter Attenuation
  • 1-year SonicElectronix.com warranty

Crossover

  • 3-Way/Dual Midbass Ready
  • Bi-Amp/Bi-Wire Capable
  • Gold Plated Terminals and Connection Jumpers
  • Integrated Level /Axis Adjustment
  • Phase Coherent Design
  • Tweeter Protection Circuit
  • Ultra-High Grade Passive Components

Tweeter

  • 19mm Voice Coil, Copper Clad Aluminum Wire on Aluminum Bobbin
  • Low Distortion Motor Structure with High Grade Neodymium Magnets and Copper Shorting Cap
  • Periphery Venting System into Cast Aluminum Tuned Chamber with Integrated Heatsink
  • Twist Lock Installation Ring with Compact Swivel System (Swivel-Flush, Swivel-Surface, Semi-Flush Angle Tweeter Mounting)

Woofer

  • 4-Layer Copper Clad Aluminum Wire on Glass Fiber Bobbin
  • Airflow Optimized Dual-Flare Pole Vent
  • Braided Low-DCR Tinsel Leads
  • Custom Cast Aluminum Frame
  • Gold Plated Terminals
  • High Grade Strontium Ferrite Magnet
  • High Quality Synthetic Black Spider
  • Low Resonance Multi-Roll Surround
  • Semi-Flush Grille
  • Single Voice Coil Design
  • Wood Fiber Cone & Phase Integrated Dust Cap

Priced Per Pair

Product history:

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(newest, current model)
Alpine SPX-137R thumbnail
(previous model, replaced by Alpine SPX-13REF)

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Specifications & Details


Speaker Specifications
Speaker Size
5-1/4"
Design
2-way Component System
Tweeter Composition
Aluminum
Woofer Composition
Wood Fiber
Woofer Surround
LRMS
Peak Power Handling
240 watts
RMS Power Handling
60 watts
Sensitivity
86 dB
Frequency Response
40 - 60000 Hz
Impedance (Per Voice Coil)
4 ohm
Bottom-Mount Depth
2.44" (62mm)
Cutout Dimensions
6.18"

Item Details


Manufacturer:

Model Number:

SPX-137R

Weight:

7.00lbs

Internal SKU:

spx137r

Internal Product ID:

6121

Customer Ratings & Reviews


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.