The DOWN4SOUND D4S-XP28 DSP is designed to give full control over your car audio system with powerful yet straightforward tuning tools. Built for professional installers and competition-level systems, the XP28 provides precise signal processing, reliable...

Take full command of your car audio system with the Down4Sound XPS610 DSP Processor. Designed for enthusiasts who want power and flexibility, the XPS610 gives you 6 switchable RCA/High-Level inputs and 10 RCA outputs, letting you build and fine-tune the...

DOWN4SOUND 2-FEMALE TO 1-MALE RCA Y-ADAPTER / Y SPLITTER 1 Ft (12-inches) Y-Adapter RCA Interconnect Cable2-Female Input to 1-Male Outputs

Excessive Amperage 350a Alternator for a 2005 Honda Civic LX 1.7L      *** No refunds once order is placed as this is a totally custom built, one off unit *** 6-8 week build time Custom built to order , direct bolt on plug...

S Series The S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower per Kw of power produced than conventional 3 phase alternators. 12 diodes, twin rectifier plates...

The DOWN4SOUND TCX 12” Subwoofer D1 is precision-engineered for aggressive output and long-term durability. Featuring a 3" 8-layer flat aluminum voice coil, carbon fiber cone, stitched surround, and a massive 5-stack Y35 ferrite motor, it delivers...

The DOWN4SOUND TCX-12 D2 is engineered for extreme output, thermal efficiency, and structural control. Designed to thrive in high-current systems, this 12-inch subwoofer delivers a massive 2700W RMS while keeping the cone stable and the motor cool under...

Installation Notes: This unit comes equipped with a smaller 1.75 inch diameter alternator pulley, and will require a slightly shorter drive belt for proper belt tension.  Not recommended for sustained use above 5,000 RPM engine speed...

 Excessive Amperage 300a Alternator For a 1996 Buick Roadmaster Limited 5.7L Lt1    *** No refunds once order is placed as this is a totally custom built, one off unit *** 6-8 week build time Custom built to order , direct...

 Excessive Amperage 350a Alternator For a 2024 GTI Volkswagen 2.0L    *** No refunds once order is placed as this is a totally custom built, one off unit *** 6-8 week build time Custom built to order , direct bolt on plug...

Excessive Amperage 300a Alternator For a 2012 Opel Insignia Buick Regal 2.0L    *** No refunds once order is placed as this is a totally custom built, one off unit *** 6-8 week build time Custom built to order , direct bolt on...

The Z v.7 is the third step up in Sundown's 2025 "ultra-high excursion" sub-woofer lineup after the M and X v.4 series. All models (12,15,18) feature our custom tooled and patented frames (US Patent Numbers D691597, D691598, and D741841) –...