Car Audio or Theater: Metra 82-6600 5-1/4 or 6-1/2-Inch Front Door Speaker Adapter for Select 1995-up Chrysler/Dodge/Jeep Vehicles - Metra Electronics Corp

Musical Instruments: Neutrik NA4LJX 1/4-Inch Neutrik SpeakON Adapter - Neutrik

CE: Belkin Speaker and Headphone Splitter - Belkin

Wireless: RainbowMOBO (TM) 8-pin to 30-pin Charging + Sync with 3.5mm Audio Adapter Converter for iPhone 5 / 5S / 5C / iPad 4 & mini & iPod Touch 7th (Rainbow Black) - RainbowMOBO

Musical Instruments: Hosa Cable BNP116BK 1/4 inch To Banana Plug Speaker Adaptor - Hosa

Car Audio or Theater: Jeep Wrangler (Tj, Rubicon, Unlimited) Front Dash Speaker Adapter 1997-2006. Converts 4 By 6 Inch Factory Speakers to 5.25 Inch Aftermarket Speakers (4x6" to 5.25"). - CIP

Wireless: Anker? 40W 5-Port Family-Sized Desktop USB Charger with PowerIQ? Technology for iPhone 5s 5c 5; iPad Air mini; Galaxy S5 S4; Note 3 2; the new HTC One (M8); Nexus and More (White) - Fantasia Trading LLC

Network Media Player: Kensington Car Audio AUX Cable for iPhone/iPod including iPhone 4S - Kensington

CE: Anker? 2nd Gen Astro Pro2 20000mAh 4-Port Aluminum Portable External Battery Charger with 9V/12V Multi-Voltage Port and PowerIQTM Technology for iPad Air mini, iPhone 5s 5c 5; Galaxy S5 S4, Tab 2, Note, Nexus, MOTO X, G, LG Optimus, HTC One and More - Anker

Network Media Player: HMDX Audio HX-P230RD JAM Classic Bluetooth Wireless Speaker (Strawberry) - Homedics HX-P230RD HMDX Jam Bluetooth Wireless Speaker - Red

Car Audio or Theater: Xscorpion HSA-6554 5-1/4"-6-1/2" Speaker Adapter for 2003-up Honda Accord (pair) - Xscorpion

Sports: X Rocker 51259 Pro H3 4.1 Audio Gaming Chair, Wireless - Ace Bayou

Wireless: Anker? Astro E4 13000mAh Dual USB Portable Charger Backup External Battery Power Bank for iPad Air, mini, iPhone 5S, 5C, 5, 4S, Galaxy S5, S4, S3, Note 3, Nexus 4, 5, 7, 10, HTC One, One 2 (M8), Droid DNA, Motorola Droid, MOTO X, LG Optimus, most other smartphones and tablets (Apple adapters 30 pin and lightning, not included) - Black - Anker

Wireless: Importer520 Universal 4 Port Wall USB Travel Home to AC Power Adapter 2.1 Amp Charger For Nokia Mural 6750; iPhone 5s, 5c, 5, 4s, 4; iPad 5, Air, Mini; Samsung Galaxy S5, S4, S3, S2, Note 3, 2; Kindle Fire HD HDX; Google Nexus 4, 5, 7, 10; Motorola Droid Razr Maxx Moto X; HTC One X V S M8; LG G2 G3; Nokia Lumia 920 1020 1520 2520; PS 4; Bluetooth Speakers & Headsets; External Battery Packs and More - White - Importer520

Wireless: Cell Charge 30 Pin to 8 Pin Audio Jack Adapter Converter for iPhone 5/5s/5c (BLACK) - Cell Charge

Network Media Player: Amplitube iRig from IK Multimedia for iPod touch, iPhone, and iPad - IK Multimedia

CE: AmazonBasics Digital Optical Audio Toslink Cable, 6 Feet - AmazonBasics

Sports: Gino Pair Universal 4" Car Speaker Spacer Adapter Bracket Holder Black - Gino

Personal Computer: Syba SD-CM-UAUD USB Stereo Audio Adapter, C-Media Chipset, RoHS - Syba

Wireless: CableJive dockBoss: Instantly upgrade your audio dock. Connect iPhone or Android smartphones and tablets to a pre-iPhone 5 audio dock. Compatible with Bose SoundDock, iHome, JBL, and many other popular audio docks. - CableJive

The above is "4" Speaker Adapter,Car Audio Or Theater: Metra 82-6600 5-1/4 Or 6-1/2-Inch Front Door Speaker Adapt..." recommended related products, Please click on the picture to see product details and 4" speaker adapter reviews!

4" Speaker Adapter Popular Q&A

Q: How to Use Speaker Adapters.
A: 1. Purchase aftermarket speakers and an adapter kit that fits your vehicle. 2. Disconnect the negative terminal from the car battery and remove the original fac... Read More »

Q: How to Build Speaker Adapters.
A: 1. Cut a length of speaker wire. This can be as long as desired. 2. Split the two speaker wires by about two inches on each end. This should make the speaker ca... Read More »

Q: What is a R4 Adapter?
A: An R4 adapter is an adapter for the Nintendo DS. It is the same shape as a Nintendo DS cartridge but it holds a micro SD memory card. The point of it is to save... Read More »

Q: What are 4 saw shark adaptations?
A: Sharp teeth. Their teeth grow back every time they loose them. They are streamlined. Read More »

Q: What size are the front and rear speakers on a 2001 ford explorer...
A: Answer 6" X 8" Read More »