Shop Open Box Items!
All Products
Explore every product Big Jeff Audio has to offer in one convenient place. From subwoofers, amplifiers, and speakers to head units, enclosures, wiring, batteries, and accessories, we carry everything you need to build, upgrade, or maintain your car audio system. Shop top brands, find expert-recommended gear, and get the parts and equipment that keep your system sounding its best — whether you’re daily driving, competing, or building the ultimate show car.
Official Big Jeff Audio HAIR TRICKS Heat Shrink 0 Gauge 20 Pack Black and Red
Big Jeff Audio5.0 / 5.0
1 Review
Made and printed in the USA Will fit 1/0 AWG, 1 AWG & 2 AWG Available in Black and Red Official Big Jeff Audio HAIR TRICKS Heat Shrink 0 Gauge...
View full detailsOfficial Big Jeff Audio BASSHEAD Heat Shrink 0 Gauge 20 Pack Black and Red
Big Jeff Audio5.0 / 5.0
1 Review
Made and printed in the USA Will fit 1/0 AWG, 1 AWG & 2 AWG Available in Black and Red Official Big Jeff Audio BASSHEAD Heat Shrink 0 Gauge 20...
View full detailsDS18 2-Way Car Alarm Security & Remote Start System LCD 3000ft Range
DS182-Way Car Alarm & Remote Start System – Receive real-time vehicle status alerts directly on the LCD remote Long Range Control – Up to 3,000 ft...
View full detailsOfficial Big Jeff Audio BASSHEAD Heat Shrink 4 Gauge 20 Pack Red and Black
Big Jeff AudioMade and printed in the USA Will fit 4 AWG & 6 AWG Available in Red and Black Official Big Jeff Audio BASSHEAD Heat Shrink 4 Gauge 20 Pack Red...
View full detailsMechman Indicator Light Harness for 88-95 GM Vehicles Female Plug to Male Plug Adapter H106
Mechman AlternatorsSeamlessly connect late model GM alternators to CS130 or CS144 vehicle harnesses. Essential for high-output alternator installations on specific G...
View full detailsDS18 Pair of 18KHz @ 4 ohms or 9KHz @ 8 ohms 6DB/OCT Bass Blockers | BB2.2UF/50V
DS18Precision Filtering: Operates at 18KHz @ 4 ohms or 9KHz @ 8 ohms, with a 6dB/octave slope for effective frequency management. Enhanced Sound Clari...
View full detailsDS18 10pk of 18KHz @ 4 ohms or 9KHz @ 8 ohms 6DB/OCT Bass Blockers | BB2.2UF/50V
DS18Precision Filtering: Operates at 18KHz @ 4 ohms or 9KHz @ 8 ohms, with a 6dB/octave slope for effective frequency management. Enhanced Sound Clari...
View full detailsMechman 2-Pin Harness - For Chrysler\Jeep\Dodge 91102R Transpo regulator P102
Mechman AlternatorsFacilitates seamless connection of Mechman alternators to 91102R Transpo regulator. Compatible with specified Chrysler/Dodge/Jeep alternators for ...
View full details2-Pin RVC Bypass Module For Factory 2005 and Newer GM Vehicles Mechman P103
Mechman AlternatorsThe 4-pin regulator style alternator must be used for this to function properly. This method does not apply to stock 2-pin style alternators. Keep...
View full detailsKicker V-Series Complete 8 AWG 2 Channel Amplifier Installation Wire Kit 47VK8
KickerComplete Kit: Includes all necessary components for a full amplifier hookup. Fuse Protection: Includes a MANL fuse holder and a 60A nickel-plated ...
View full detailsThe Install Bay by Metra Red Nylon 22/18 Gauge Butt Connector (100 Pack) RNBC
AmmoTennaThe Install Bay by Metra Red Nylon 22/18 Gauge Butt Connector (100 Pack) RNBC This listing includes: (100) Red Nylon 22/18 Gauge Butt Connector ...
View full details40ah 6 Cell Bank DIY set with Lithium Economy Style Buss Bars JM-40AHBUSS
Jims Machineworx5.0 / 5.0
1 Review
This is a do it yourself set with Lithium Economy Style Buss bars to create a 40ah 6 cell bank. Includes everything you need except the batteries....
View full detailsMechman For Ford Newer 6G Alternator to Older 4G Adapter Harness H111
Mechman AlternatorsMade for Ford Newer 6G Alternator to Older 4G Adapter Harness Plug-and-play installation for easy setup Weatherproof and epoxy-sealed for durabili...
View full detailsHarness H108, Made for Toyota Oval 3-Pin Alternator Mechman GM 4-Pin Alternator
Mechman AlternatorsSpecifically designed to adapt a GM 4-pin alternator for Toyota oval 3-pin wiring setup Plug-and-play installation for easy integration Ensures re...
View full detailsAdapter Harness H110, Compatible with Ford 3G/4G Female (Fits GM Oval Male)
Mechman AlternatorsCompatible with Ford vehicles equipped with 3G or 4G alternators. Plug-and-play installation for easy integration Durable construction and weathe...
View full detailsHarness H105, For Ford 6G Alternator Connection Fits Mechman GM 4-Pin Alternator
Mechman AlternatorsConverts GM 4-Pin alternator (Male) to (Female) For Ford 6G Harness Plug-and-play installation for easy integration Durable construction and weath...
View full detailsMechman GM Oval 4-Pin Alternator to CS130 / CS144 Vehicle Harness H101
Mechman AlternatorsConverts oval GM 4-Pin alternator to CS130/144 vehicle harness. Plug-and-play installation for easy integration. Mechman GM Oval 4-Pin Alternator ...
View full detailsMechman Indicator Light Harness for 1996-2004 GM Truck w/Oval Style plugs H104
Mechman AlternatorsEnhanced Visibility: The Mechman H104 Indicator Light Harness is specifically designed for 1996-2004 GM trucks with oval-style plugs, providing a ...
View full detailsKicker KS Series Pair of 6.5" 100W RMS 4-Ohm 2-Way Coaxial Speakers / 51KSC6504
KickerImmersive Audio Experience - Enjoy concert-like volume with KICKER's KSC650 2-Way Speakers, providing smoothness and subtlety to please even the m...
View full detailsMechman GM 4 Pin Plug Pigtail w/Excite Wire P101
Mechman AlternatorsPlug-and-Play Design: The pigtail plugs directly into any oval-shaped 4-pin GM alternator plug, making installation quick and hassle-free. Excite ...
View full detailsDS18 Pro 1.5" Replacement Diaphragm for PRO-TWX3 and Universal 4-Ohm / TWX3TIVC
DS18High-Quality Replacement: 1.5" titanium diaphragm designed as a replacement for PRO-TWX3TI tweeters. Enhanced Sound Clarity: Titanium construction...
View full detailsKicker KS Series 6.5" 4 Ohm 125 Watts Component Speaker system 51KSS6504
KickerConcert-Like Volume - Enjoy concert-level volume with KICKER KS-Series 6.5" Component Car Speakers. High-End Audio Experience - Silk-dome tweeters...
View full detailsAudiopipe Installation Solution Soldering Iron Replacement Tip KD-100SS
Installation SolutionDirect Replacement Compatibility: Designed specifically for use with the Audiopipe 79B100SS soldering iron, ensuring proper fit, heat transfer, an...
View full detailsInstall Bay 20 FT Nine Conductor 9 Wire Twisted Multi-Use Speed Wire MC918-20
Metra Electronics5.0 / 5.0
1 Review
Contains 9 individually jacketed wires enclosed in a protective blue jacket. 20 Ft. 9-Conductor 18 Gauge Twisted Multi-Conductor Speaker / Multi-U...
View full detailsDS18 Vehicle Dual Quick Charger USB Ports With LED Display Volt Meter VMU2.R
DS184.0 / 5.0
1 Review
High-Quality Performance: DS18 12V Meter with Dual Quick Charger USB Ports offers efficient charging and real-time car battery voltage reading. Du...
View full detailsMechman H113-L-3 Toyota/Lexus 4-Pin Lithium Voltage Boost Harness +1.1V to +1.4V
Mechman AlternatorsMechman 1.7V Voltage Boosting Harness for Toyota 4 Pin Regulators H113-L-3 This Listing Includes: (1) Mechman voltage boosting harness for Toyo...
View full detailsTru Spec Vented Prefab Single 15" Subwoofer Enclosure for Sundown SA Series 15v2
Tru Spec4.0 / 5.0
1 Review
Made for Sundown SA-15v2 with double flush baffle Box External Dimensions: 30.00" × 16.50" × 17.22" Precisely built to manufacturer's specificatio...
View full detailsTru Spec Vented Prefab Dual 12" Subwoofer Enclosure for Sundown SA Series 12v2
Tru Spec5.0 / 5.0
1 Review
Made for Sundown SA-12v2 with flush baffle Total woofer displacements factored in: 0.24 cuft Net Internal Volume: 3.50 ft3 Tuning Frequency: 35 H...
View full detailsMechman H113-L-2 Toyota/Lexus 4-Pin AGM Voltage Boost Harness +0.8V to +1.0V
Mechman Alternators0.8V TO 1.0V VOLTAGE INCREASE: Raises alternator charging voltage for compatible high-voltage AGM battery applications. TOYOTA-STYLE 4-PIN CONNECT...
View full detailsMechman MM-VC1 2005 Newer GM/Chevy 2-Pin RVC Voltage Controller
Mechman AlternatorsThe Mechman MM-VC1 offers a professional and straightforward installation for controlling 2005> GM 2-pin equipped alternators. Ideal solution f...
View full detailsInstall Bay Yellow Nylon Butt Crimping Connectors 100 Pack 10-12 Ga YNBC
Install BayYellow Nylon Butt Crimping Connectors 100 Pack Metra Install Bay 10-12 Ga YNBC This listing includes: (100) Yellow Nylon Butt Crimping Connectors ...
View full detailsAudiopipe 8" BDC3 Subwoofer Combo 250W RMS w/ 800W 1 Ohm Monoblock Amplifier
AudiopipePowerful Subwoofer: Delivers 250W RMS for deep, impactful bass that enhances your audio experience. High-Performance Amplifier: The 800W 1 Ohm Mon...
View full detailsMechman 370-Amp Billet Alternator for Dodge Ram Diesel Trucks / B11378370B
Mechman AlternatorsHigh Output Power: Delivers an impressive 370 amps of power, ensuring your Dodge Ram diesel truck's electrical system can handle high-demand acces...
View full detailsMechman 320 Amp High Output Alternator For 98-05 Lexus GS/IS 300 3.0L 13791320
Mechman AlternatorsS Series 6-phase alternators offer exceptional output in a compact, durable design - Highly efficient with lower horsepower per Kw compared to con...
View full detailsMechman H104 Voltage Boost Harness 96-04 GM +1V Increase for Lithium Batteries
Mechman AlternatorsThe Mechman H104-L Voltage Boost Harness is tailored for 1996-2004 GM Trucks and SUVs with an oval GM alternator plug. Features a longer blue wire...
View full detailsDS18 3" LCD Marine & Powersports 4 CH 25W RMS BT DAB+ Head Unit W/ Camera Input
DS18Ultimate control center for any marine audio system, the DS18 MRX300 offers versatile features and robust performance. Features 3 independent audi...
View full detailsAxxess 20FT Universal Extension Harness For LOC T Harnesses W/ Molex Plug LOC-EXT
Metra5.0 / 5.0
1 Review
Extend Speaker Harnesses: Easily extend speaker harnesses to aftermarket amplifiers using factory speaker wires. Universal Compatibility: Compatib...
View full detailsAxxess LOC T-Harness For 2014-2020 Chevy & GMC Full System or Subwoofer LOC-GMH2
AXXESS Integrate5.0 / 5.0
1 Review
Easy Subwoofer Integration: Seamlessly connect a subwoofer or complete audio system to your vehicle with this vehicle-specific Active LOC T-harnes...
View full detailsAxxess LOC T-Harness For 2013-2022 Chrysler/Jeep/Dodge/Ram System or Subwoofer
Axxess5.0 / 5.0
1 Review
Seamless Audio Integration: Easily add a subwoofer or complete audio system to your vehicle with this vehicle-specific Active LOC T-harness by Axx...
View full detailsAxxess LOC T-Harness For 2021 & Up* Chrysler/Jeep/Dodge/Ram System or Subwoofer
Axxess5.0 / 5.0
2 Reviews
Seamless Audio Integration: Easily add a subwoofer or complete audio system to your vehicle with this vehicle-specific Active LOC T-harness by Axx...
View full detailsAxxess LOC T-Harness For 2011-2020 Ford Full System or Subwoofer / LOC-FDH2
Axxess5.0 / 5.0
1 Review
Seamless Audio Integration: Easily enhance your vehicle's audio system with this vehicle-specific Active LOC T-harness by Axxess. Versatile Compat...
View full detailsAxxess LOC T-Harness For 2018-2021 Toyota Full System or Subwoofer LOC-TYH2
Axxess5.0 / 5.0
1 Review
Seamless Audio Integration: Easily connect a subwoofer or complete audio system with this vehicle-specific Active LOC T-harness by Proscenium. Enh...
View full detailsAudiopipe 12" 500W Max Dual Voice Coil 4-Ohm Ultra Shallow Mount Subwoofer
AudiopipeSlim Design: Fits effortlessly under the seat of quad cab Ford, GM, and Ram trucks, maximizing space without compromising performance. Peak Power:...
View full detailsBass Head Embroidered Beanie One Size Fits all
Big Jeff Online IncThe perfect beanie has arrived! This embroidered beauty has a snug fit that ensures you're going to feel cozy and warm whatever you're doing. • ...
View full detailsAxxess Active Line Out Converter with Bass Enhancement Processor AX-BRC-PRO
AxxessElevate Your Audio Experience: Enhance your car's sound system with this advanced active LOC and bass enhancement processor. Seamless Integration:...
View full detailsAXXESS 4-Channel Active Line Output Converter with Bass Boost
AXXESSEnhanced Sound Quality: Upgrade your car audio with this 4-channel active LOC, integrating aftermarket amplifiers with OEM source units. Advanced ...
View full detailsAxxess 4-Channel Active Line Output Converter with Bass Boost AX-LOC2.4-PRO
AxxessVersatile Functionality: Enables integration of aftermarket amplifiers with OEM source units, expanding audio options. Advanced Features: Highligh...
View full detailsAxxess 2-Channel Active Line Output Converter with Bass Boost AX-LOC2.2-PRO
AxxessVersatile Functionality: Enables integration of aftermarket amplifiers with OEM source units, expanding audio options. Advanced Features: Highligh...
View full details