BX2 is a bass frequency extension technology that provides increased perceived bass frequency response below the low frequency cut off in an audio system. BX2 uses the principle of the missing fundamental, which creates the sensation of low frequencies by generating a carefully calculated series of harmonics designed to simulate the auditory experience in the human ear caused by the missing fundamental pitch. 

These harmonics extend the perceived frequency response up to 1.5 octaves below the speaker cutoff frequency (f3) without perceived distortion, increased peak power consumption or peak speaker excursion.

BX2 technology allows the system user to experience dramatically improved levels of system performance, sound quality and improved low-frequency
response by:

Increasing low-frequency output and performance without causing the speakers to perform outside their physical design limitations. 

Decreasing power consumption during low-frequency reproduction up to 75%.

Allows small format speakers to reproduce low frequencies traditionally designed for larger
speakers. 

• The KS125.2BX Mini Exclusively Incorporates ARC Audio’s BX2 Low-Frequency Enhancement Technology. The BX2 Technology Gives You Big Bass And Improved Low-Frequency Response Without The Additional Physical Demand On Your Speakers.
• The KS125.2BX Mini Uses A High-Velocity Forced Induction Fan For Additional Cooling.
• Bridge Auto Detect Mode (Autosense Turn On).
• Ultra Compact Chassis Design Allows For Installation In Small Vehicles And Inside The Factory Fairing Of Most HD Brand Motorcycles.
• Class G/H Switching Design Allows For Maximum Sound Quality, Performance And Reliability Without Distortion And Lack Of Performance Of Digital Class-D Amplifiers.
• Designed By Audio Industry Engineer Robert Zeff.
• Self Branded Ultra-Low ESR Caps And Power Supply Components Allow For maximum Efficiency Without Any Compromise Of Sound Quality Or Long-Term Performance.
• Protection Against: Reverse Voltage, Speaker Short, And Thermal Overload.
• Wide Band Over Voltage Protection Allows For Continued Use Without Interruption From Very High Voltage Spikes That Can Happen With Stator Based Charging Systems.
• Can Drive Highly Reactive Loads Hi-Level Speaker Inputs For OEM Applications And Integration From Most Factory Radios Allowing You To Retain All Of The Factory Steering Wheel/Handle Bar Controls And Features.
• Optically Isolated Mosfet Power Supply.
• Stable to 2-Ohms Stereo.
• Ultra Low Radiated Noise for Clean AM/FM/ Reception

Designed specifically for the motorcycle and power sports market, the MOTO 600.4 amplifier is the high-performance solution for today’s extreme music lovers. Capable of delivering over 600 watts into 4 ohms from all four channels, the Moto 600.4 takes your factory stereo from zero to hero in a single package solution.

When it comes to dynamics and overall sound quality nothing beats raw power except clean power. With the Moto 600.4 amplifier that is exactly what you get. Having 150 watts into 4 channels at 2 or 4 ohms available gives your speakers more than enough dynamics power to satisfy even the most demanding of listeners. This amazing power is produced without taxing your factory charging system beyond its limits. The Moto 600.4’s patent-pending power supply design achieves more than 90% efficiency, allowing you to get full power without needing a ton of electrical current form your bike.

Compact, elegant and full of unmatchable power, the Moto 600.4 is small enough to fit inside the factory fairing of all 2000 – 2015 Harley-Davidson full fairing motorcycles without the need for modifications, custom installation or devaluing your motorcycle. Its compact size allows you to achieve that personalized "Big Sound" without the loss of valuable bag space.

The best part, we don't creative or non-standard test procedures or instructions to get our rated power numbers. Experience real power from a real amplifier that delivers nothing but the BEST sound and performance possible. 

• Multi-Channel Amplifier (Four-Channels)
• Microprocessor Class-D Design.
• Designed And Engineered By Robert Zeff.
• High-Frequency Power Supply Design For Improved Signal Transparency And Overall Sound Quality.
• Built-In Internal Fan For Additional Cooling
• Remote Location Status Indicator Lead For Easy Relocation Of The Amplifiers On-Board Diagnostics Indicator.
• Full-Range Amplifier Design
• PP Coated And Treated Design Components For The Highest Level Of Environmental Protection
• Single Side Plug And Play (PNP) Connection Design.
• Quick Disconnect Speaker Terminal Plugs.
• Audiophile Class-D Output Filter Networks.
• Detailed Microprocessor Controlled Protection.
• Large, High-Frequency Switching Power Supplies.
• RCA Inputs Are Compatible With Speaker Level Inputs.
• Fault Codes Storage Of The Last Protection Code Detected
• High Signal To Noise Ratio Without Compromising Power Output.
• Fully Balanced Input Stage Significantly Increases Flexibility
• Ultra Low ESR, High Capacity Power Supply Storage capacitors.
• Bridged Mode Auto Detect Turn-On Works With Most Chip Based OEM Head units.
• Precision Filtering Isolates The Power supply Reducing Unwanted Interference In Radio Reception