Can you do it better??...Perfect Hairtrick with 2 15"s SP4 subs in the boot (no wall)..Enjoy !! HD

Open Door Haitrick with Dual Fi SP4 Subwoofer in a Ported Enclosure (Non-walled) in a full size SUV.. Crescendo audio BC 3500D Amplifiers Follow Facebook - https://www.facebook.com/sundownaudioindia Twitter - https://twitter.com/luckyishere123 Instagram - https://www.instagram.com/luckyishere Google - https://plus.google.com/b/109756584178283626519/+luckyishere12345 Team Sundown Audio India Enclosure Tuned @ 29Hz 2 FI SP4 15" 2 Crescendo Audio BC3500D strapped Shok Industries Ref 1/0 Mechman 312A Alternator 6 Amaron 80Ah Lead Acid Batteries CDT Mids and Highs Beyma CD-10Fe Massive Audio D800.4 The SP4 v2 Series is the latest in the progression of Fi subwoofers geared towards thundering daily drivers. Starting with a monster 4″ voicecoil for increase thermal capacity, we built the rest of the sub around that. With a proprietary US made steel water jet and machined in house on one of our CNC machines, there is no shortage of motor force in the FEA derived design. With a solid pole and open motor geometry, there is plenty of thermal capacity in the SP4. A single 10″ high grade magnet provides the Gauss while 4 Fi designed 10″ heavy progressive spiders keep things under mechanical control. Utilizing a special 144 tinsel count leadwire there are no losses with power transfer to the coil. The 2017 SP4 v2 Series is designed for monster daily driving systems requiring high linearity and extreme power handling. The SP4 v2 Series raises the bar for the industry…again. Crescendo audio BC 3500D Stable down to .5ohm on strong electrical Up to 18.5v capable on BC3500/BC5500. Remote Bass/Gain knob with Clipping Indicator. Custom tooled, proprietary Multi-piece Thermal optimized Heatsink with patent pending interlocking slide-out CNC engraved top plate. 2 stage copper anodized removable top plate. Silver plated high end hard-wired Tiffany RCA inputs and oversized 1/0 Power/Ground Inputs for efficient current transfer. Overbuilt Power supply with heavy copper traces and Military spec PCB/heavy duty standoffs for extreme vibration resistance. Manufactured using some of the highest quality and most reliable electrical components, with many 3% tolerance components throughout. Full 4-Stage Intelligent protection Circuitry 1 Year/1ohm comprehensive warranty with 2 year/.5ohm optional extended warranty available.