Infinity Kappa Perfect 900x Speakers and Amplifier Performance Combo SKU: INF-900X-KS125.2



Free System Design Call Now 1(888)311-0016

So Much Performance in an Easy-to-Bolt-in Package

This combo gets you both the spectacular-sounding Infinity Kappa Perfect 900X speakers as well as an Arc Audio KS125.2 BX2 amplifier. The KS125.2 amplifier has a built-in BX2 bass boost feature that is perfect for Harley sound systems. The BX2 feature uses harmonic bass tone manipulation to get a lot more bass out of your speakers than otherwise would be possible. And to make the BX2 feature even better it creates more bass without extra demand on the speaker or the amplifier. 

Product Description

Amplifier Signal Inputs

Perfect for upgrading to a 4 speaker system fro a 2 speaker system. The Infinity Kappa Perfect speakers are loud and spectacular sounding right out of the box without any special tuning required. 

The Arc Audio Ks125.2 has both RCA line level inputs as well as high level inputs. If feeding signal direct from the factory radio without a DSP, you will need to hardwire the included high level input harness to the factory radio speaker outputs. We can do this for you upon request. Please call for more details 1(888)311-0016.


  • Aftermarket 6x9 Speaker lids or cut in kit or American Hard Bag 5x7 to 6x9 speaker lid adapters
  • Will not fit factory Harley 5x7 lids without adapters


1 Year


Water Proof

High Level Performance

Road Glide

Street Glide

  • Waterproof Speakers
  • Bass Boost that works great in bags!
  • Fits in any aftermarket 6x9 speaker lid or cut in kit
  • Spectacular sounding without any special tuning
  • Easy installation



  • Power handling: 75Wrms, 225W peak
  • Sensitivity (@ 2.83V): 93dB
  • Frequency Response: 60Hz - 20kHz
  • Impedance: 3.0 ohms


  • 125 Watts @ 2 Ohms x 2
  • Crossover Range 5hz - 550hz
  • BX2 Bass Boost Technology
  • High Level Inputs
  • Dimensions: 8.25" x 4.8" x 1.7"

What's Included

  • Arc Audio KS125.2 Mini 2 Channel Amplifier
  • 1 Pair Infinity Kappa Perfect 900X Speakers
  • 1 Pair Passive Crossovers

What's Not Included

  • Interconnect
  • Speaker Grills