Best Audio Cables for Clean Sound in 2026

The QianLink 2-Pack AUX Cable is a practical solution for anyone who relies on auxiliary audio connections. Whether you're connecting your phone to a car stereo, linking a portable speaker to your laptop, or using headphones with various devices, this cable delivers the connectivity and audio quality you need. The bundle of two 6.6-foot cables makes it perfect for home, office, and on-the-go use.

What sets this product apart is its attention to audio fidelity and durability. The 24K gold-plated connectors and enameled wire core work together to minimize signal loss and ensure clean, interference-free sound transmission. The pure copper shell adds an extra layer of reliability, making this more than just a basic connector. Users consistently report improved sound quality compared to standard cables, with noticeably reduced noise and better audio clarity.

Build quality is impressive for the price point. The double-braided nylon exterior provides excellent protection against fraying and wear, while the cable's 20,000+ bend lifespan rating means it will withstand years of regular use. The tangle-free design is a genuine convenience feature, making storage and transport hassle-free. The cable maintains its shape and doesn't coil unpredictably like cheaper alternatives.

The main consideration is the 6.6-foot length, which some users find longer than expected for typical auxiliary cable applications. If you prefer a more compact option, this may not be ideal. Additionally, the nylon braiding can attract dust in outdoor environments, though this is primarily a cosmetic concern rather than a functional issue.

Overall, the QianLink AUX Cable represents excellent value for users seeking reliable, high-quality auxiliary connections. With strong build quality, genuine audio improvements, and universal compatibility, it's a smart choice for anyone tired of poor-quality cables. Highly recommended for daily use across multiple devices.

Cable Length: 6.6 feet (2 meters)

Connector Type: 3.5mm TRS Male-to-Male Auxiliary

Quantity: 2 cables per pack

Outer Material: Double-braided nylon

Connector Material: 24K gold-plated connectors with pure copper shell

Wire Core: Enameled copper

Bend Lifespan: 20,000+ cycles

Color: Grey

Weight: 0.06 kg per pack

Compatibility: Any device with 3.5mm auxiliary jack including cars, home stereos, speakers, iPods, iPads, headphones, and Echo devices

Car Audio Systems: Compatible with factory and aftermarket car stereos featuring 3.5mm auxiliary input ports. Ideal for smartphones and portable music devices.

Home Audio: Works with powered speakers, amplifiers, receivers, and home theater systems. Perfect for connecting streaming devices to existing audio equipment.

Portable Devices: Fully compatible with iPhones, iPads, iPods, Android phones, tablets, and laptops with standard 3.5mm headphone jacks.

Smart Speakers: Works with Echo Dot, Google Home, and other smart speakers with auxiliary input capabilities.

Headphones and Earbuds: Compatible with wired headphones and earbuds that use 3.5mm connectors.

Gaming Devices: Supports gaming consoles and portable gaming devices with 3.5mm audio outputs.

The KabelDirekt Optical TOSLINK Cable is a premium digital audio solution designed for home theater enthusiasts, gamers, and anyone seeking pristine audio transmission. This 6-foot fiber optic cable connects TVs, soundbars, gaming consoles like PS4, PS5, and Xbox Series X/S, plus Blu-ray players and streaming devices to amplifiers, receivers, and high-fidelity audio systems with professional-grade reliability.

What sets this cable apart is its fiber optic construction, which eliminates electromagnetic interference entirely while delivering 100% signal transmission with zero loss. The 24K gold-plated connectors resist corrosion and oxidation, ensuring your connections remain clean and stable for years. Each cable undergoes rigorous multi-stage testing during manufacturing, reflecting KabelDirekt's commitment to quality and durability that justifies the investment.

The fully flexible PVC jacket makes installation straightforward in tight spaces behind entertainment centers or wall-mounted systems. Whether you're upgrading a basic soundbar setup or building a reference-grade home theater, this cable handles the job without introducing noise, hum, or signal degradation that cheaper alternatives often produce.

The main limitation is the fixed 6-foot length, which may require additional cables for longer runs or multiple room setups. Fiber optic cables also demand slightly more careful handling than standard copper cables to avoid kinks or sharp bends that could compromise performance. However, these minor considerations are offset by superior audio fidelity and the included 36-month warranty.

For anyone with TOSLINK-equipped devices seeking reliable, interference-free digital audio transmission at an accessible price, this KabelDirekt cable delivers exceptional value and performance that will satisfy both casual listeners and demanding audiophiles alike.

This optical TOSLINK cable works with any device featuring TOSLINK optical ports labeled OPT In, OPT Out, S/PDIF In, or S/PDIF Out. Common compatible devices include most modern televisions, soundbars, AV receivers, and amplifiers that support digital audio transmission.

Gaming console compatibility spans multiple generations: PlayStation 3, PS4, PS5, Xbox One, Xbox Series X, and Xbox Series S all feature TOSLINK outputs for surround sound gaming. Blu-ray players, DVD players, and streaming devices with optical outputs also work perfectly. Ensure your specific device has an optical port before purchasing, as some newer devices have shifted to HDMI eARC or wireless audio solutions.

Installation is straightforward: locate the TOSLINK optical port on both your source device (TV, console, player) and your audio destination (soundbar, receiver, amplifier). Simply insert the cable connectors firmly into each port until you hear a click, indicating a secure connection.

The flexible PVC jacket allows routing behind entertainment centers, through wall conduits, or along cable management systems. Avoid sharp bends or kinks that could damage the fiber optic core. Once connected, enable digital audio output in your source device settings if needed, and your audio equipment should automatically detect the signal within seconds.

The UGREEN 3.5mm to RCA cable is a versatile audio adapter designed for anyone who needs to connect portable devices like smartphones, tablets, or MP3 players to home stereo systems, amplifiers, car audio receivers, or professional audio equipment. At just 6.6 feet in length, this cable bridges the gap between modern auxiliary connectors and traditional RCA inputs found on most audio gear.

What sets this cable apart is its focus on audio fidelity and durability. The gold-plated connectors and high-quality copper conductors work together to minimize signal loss and interference, delivering crisp, clear stereo sound without the radio frequency or electromagnetic noise that plagues cheaper cables. The slim connector design is thoughtfully engineered to fit snugly even on devices with protective cases, eliminating the frustration of incompatibility.

Build quality is impressive for the price point. The flexible PVC jacket is rated for over 10,000 bends without breaking, making this a cable that will outlast most devices it connects. The tangle-free design keeps the cable organized in drawers or bags, and the red and white color-coded connectors make setup intuitive even for non-technical users.

The main limitation is that this is a stereo-only cable, so it won't work for surround sound applications. Additionally, some heavy-duty phone cases may require removal before the slim connectors fit properly. These are minor trade-offs for the overall value and performance.

Overall, the UGREEN 3.5mm to RCA cable is a reliable, well-made audio solution that delivers professional-grade sound quality at an everyday price. Whether you're connecting your phone to a car stereo, setting up a home audio system, or managing audio in a professional environment, this cable handles the job with confidence.

Connector Type: 3.5mm auxiliary to dual RCA male connectors
Cable Length: 6.6 feet (also available in 3, 10, and 15-foot options)
Connector Material: Gold-plated connectors with high-quality copper conductors
Cable Jacket: Flexible PVC, tangle-free design
Durability Rating: 10,000+ bend lifespan
Color Coding: Red and white connectors for easy identification

Compatibility: iPhone, iPad, iPod, Samsung Galaxy phones, Android devices, MP3 players, laptops, tablets, home amplifiers, receivers, car audio systems, and any device with 3.5mm auxiliary jack or RCA inputs
Certifications: CE certified
Model: UGREEN 10584
Weight: 0.01 kg

Who Should Buy This Cable? This UGREEN cable is ideal for anyone with a smartphone, tablet, or portable audio player who wants to connect to a home stereo system, car audio receiver, or professional audio equipment. It's perfect for music lovers, DJs, content creators, and anyone who values audio quality without breaking the bank.

When to Use It: Use this cable to stream music from your phone to your car stereo during commutes, connect your tablet to a home amplifier for better sound, or integrate portable devices into a professional audio setup. The 6.6-foot length works well for most home and car applications.

Length Considerations: The 6.6-foot version suits most car and home setups. Choose the 3-foot option for compact spaces or desktop setups, the 10-foot version for larger living rooms or studios, or the 15-foot option for professional installations requiring extended cable runs.

Installation Tips: Ensure both the 3.5mm jack and RCA ports are clean before connecting. The slim connectors fit most phone cases, but remove the case if you experience resistance. Color-coding makes connections simple: red to red, white to white for stereo audio.

The JSAUX RCA to 3.5mm cable is a straightforward audio connectivity solution designed for anyone needing to bridge the gap between modern portable devices and traditional RCA-equipped audio equipment. Whether you're connecting a smartphone to a home stereo receiver, linking a tablet to powered speakers, or integrating an MP3 player into a car audio system, this cable handles the job reliably.

What sets this cable apart is its thoughtful engineering for audio fidelity. The dual-shielded construction with gold-plated connectors minimizes electromagnetic interference that can introduce hum or noise into your audio signal. The oxygen copper wire core further supports clean signal transmission, resulting in noticeably clearer stereo playback compared to budget alternatives. The color-coded red and white RCA connectors eliminate guesswork during setup, ensuring proper left and right channel alignment every time.

Build quality is impressive for the price point. The double-braided nylon exterior feels substantial and resists tangling, while the cable is rated for over 10,000 bend cycles. The connectors feature reinforced grips that make insertion and removal smooth without feeling loose or unreliable. At 6.6 feet, the length provides genuine flexibility for positioning equipment without excessive slack or strain.

The main limitations stem from its analog-only design. This cable won't work with newer devices that lack 3.5mm jacks or with digital audio formats. Additionally, outdoor durability may be compromised in extreme weather, though typical indoor and light outdoor use poses no concerns. Some users with very noise-sensitive audio setups may still detect minor interference depending on their specific equipment.

For the price and feature set, the JSAUX RCA to 3.5mm cable represents solid value. It excels at its core function of delivering clean, reliable audio between devices, backed by genuine durability that should provide years of service. Recommended for home theater enthusiasts, car audio upgraders, and anyone seeking a trustworthy audio interconnect cable.

Cable Specifications
Length: 6.6 feet (2 meters)
Connector Type: RCA male to 3.5mm male
Configuration: Stereo Y-splitter (one 3.5mm jack to two RCA plugs)
Cable Material: Double-braided nylon exterior
Wire Core: Oxygen copper
Connectors: Gold-plated with dual shielding
Weight: 2.2 ounces
Color: Grey

Performance Ratings
Bend Lifespan: 10,000+ cycles
Wattage Rating: 20 watts
Certifications: CE, FCC, RoHS compliant
Usage: Indoor and outdoor

Compatibility
Audio Sources: Smartphones (iPhone, Samsung Galaxy, Google Pixel, LG), tablets (iPad, Amazon Fire), MP3 players, laptops
Audio Destinations: Stereo receivers, amplifiers, powered speakers, televisions, car audio systems, DVD players
Specific Tablet Support: All Amazon Fire models from 5th generation through 13th generation, including Fire Kids and Fire Max variants

Who Should Buy This Cable
This cable is ideal for anyone with devices featuring a 3.5mm headphone jack who wants to connect to audio equipment with RCA inputs. Common use cases include connecting smartphones or tablets to home stereo receivers, linking portable audio players to amplifiers or powered speakers, integrating car audio systems with modern devices, and setting up home theater configurations.

Who Should Look Elsewhere
If your devices use only USB-C or Lightning connectors without a 3.5mm jack adapter, you'll need a different solution. Users requiring digital audio transmission, surround sound capability, or very high-end audiophile performance may want to explore alternatives. Those exclusively using wireless audio should consider Bluetooth speakers or receivers instead.

Cable Length Considerations
The 6.6-foot length suits most home entertainment setups and car installations. If you need shorter runs (under 3 feet), consider a more compact option. For distances exceeding 6.6 feet, you may experience slight signal degradation, so a longer cable or active amplifier would be preferable.

Installation Tips
Always power down all equipment before connecting or disconnecting the cable. Ensure connectors are fully seated for optimal audio quality. Keep the cable away from power cords and electrical sources to minimize interference. The color-coded connectors make it impossible to reverse channels, but double-check your receiver settings if audio seems off.

The Nanxudyj 6ft 90-degree auxiliary cable is a no-compromise audio solution designed for anyone tired of dealing with tangled cords, signal degradation, and broken connectors. Whether you're connecting a car stereo, PlayStation controller, PC speakers, or gaming headset, this universal 3.5mm cable delivers reliable performance at an unbeatable price.

What sets this cable apart is its thoughtful engineering. The 90-degree right-angle connector eliminates painful cable bending in tight spaces, a common problem in cars and behind entertainment centers. The triple-shielded pure copper core ensures pristine audio transmission without the crackling static and interference that plague cheaper alternatives. Users consistently report crystal-clear sound quality whether streaming music, podcasts, or gaming.

Build quality is impressive for the price. The nylon braiding feels premium and resists tangling, while reinforced connectors have been tested to survive 20,000+ bends without fraying or breaking. The 6-foot length provides genuine flexibility without excessive bulk, and the included cable ties keep everything organized. At just 0.03 kg, portability is effortless.

The main limitation is compatibility. Modern iPhones and many newer Android flagships lack 3.5mm jacks, requiring a separate adapter. Additionally, protective phone cases may interfere with the 90-degree connector in some situations. These are industry-wide constraints rather than product flaws.

Verdict: This is a best-in-class auxiliary cable that combines smart design, superior audio quality, and exceptional durability. The 90-degree connector alone solves real-world problems, while the triple-shielded construction and nylon braiding justify long-term confidence. Backed by a 24-month warranty and proven across thousands of five-star reviews, it's the cable you should buy.

Physical Specifications: Length: 6 feet (72 inches), Weight: 0.03 kg, Connector Type: 90-degree right-angle 3.5mm male-to-male TRS, Material: Nylon braided with woven cotton exterior, Color: Black, Shape: Round

Technical Specifications: Connector Gender: Male-to-male, Number of Pins: 3, Frequency: 60 Hz, Maximum Voltage: 5 volts, Cable Type: Shielded auxiliary with pure copper cores and triple shielding, Tested for 20,000+ bends

Compatibility: Universal 3.5mm jack devices including car stereos, home speakers, PS4/PS5 controllers, Xbox controllers, PC/laptops, tablets, MP3 players, Beats headphones, Samsung Galaxy phones, Google Pixel phones, Kindle Fire tablets, and wireless Bluetooth speakers. Modern devices without 3.5mm jack require separate adapter.

Package Contents: 1x Nanxudyj 6ft 90-degree 3.5mm auxiliary cable, 2x reusable fastening cable ties, Warranty: 24 months

Car Owners: If you connect your phone or media player to your car stereo, the 90-degree connector eliminates the frustrating cable bending that damages standard cords. Fits perfectly in tight dashboard spaces without adding bulk.

Gamers: PlayStation and Xbox controller users benefit from the right-angle design, which prevents strain when the cable rests against your body during extended gaming sessions. Triple shielding eliminates audio lag and interference.

Audio Enthusiasts: The pure copper cores and triple shielding deliver lossless audio quality that cheap cables simply cannot match. Perfect for connecting studio monitors, home theater systems, or quality headphones.

Budget-Conscious Buyers: At under $5, this cable offers premium build quality and performance typically found in cables costing three times as much. The 24-month warranty and thousands of positive reviews confirm its reliability.

Who Should Skip It: If your primary device is a modern iPhone or recent flagship Android without a 3.5mm jack, you'll need to purchase a separate USB-C or Lightning adapter. This cable works only with devices featuring native 3.5mm audio jacks.

The Amazon Basics Toslink Digital Optical Audio Cable is a no-frills, high-performance solution for anyone looking to connect their soundbar, Blu-ray player, game console, or other audio device to a TV or home audio system. This 6-foot cable is perfect for typical entertainment center setups and delivers professional-grade digital audio transmission at an unbeatable price point.

The standout feature here is the fiber-optic construction paired with gold-plated connectors. Fiber-optic technology completely eliminates electromagnetic interference that plagues traditional copper cables, resulting in cleaner, more accurate multi-channel audio. The gold-plated connectors resist corrosion and ensure consistent signal quality over years of use, while the buffer tubing provides additional durability and protection during installation.

Build quality is solid for the price. The lightweight, flexible PVC exterior makes routing the cable behind furniture effortless, and the tangle-free design keeps your setup looking organized. The removable rubber protective caps are a thoughtful touch that extends cable lifespan when the connection sits unused. Just remember to remove these caps before plugging in for the first time, as they are designed purely for storage protection.

The main limitation is that this cable only comes in a 6-foot length, so if you need a longer run, you will need to look elsewhere. Additionally, while fiber-optic cables are superior for audio transmission, they are slightly more fragile than standard copper cables and should not be bent at extreme angles. For most users, these minor drawbacks are negligible given the exceptional performance and affordability.

Overall, the Amazon Basics Toslink cable is a smart, reliable choice for upgrading your home theater audio setup without breaking the bank. It delivers professional sound quality, durable construction, and hassle-free installation in a compact package that ranks among the best fiber-optic cables available today.

Cable Type: Fiber Optic (Toslink)
Length: 6 feet
Connector Type: TOSLINK Male-to-Male
Connector Finish: Gold-plated
Exterior Material: Polyvinyl Chloride (PVC)
Weight: 2.72 ounces
Item Shape: Round
Special Features: Tangle-free, removable protective caps, corrosion-resistant connectors
Compatibility: Soundbars, TVs, Blu-ray players, game consoles, audio systems, CD players
Model Number: 7GSW
Manufacturer: Amazon

Who Should Buy This Cable? Anyone setting up a home theater system, upgrading their soundbar connection, or connecting gaming consoles to their TV should consider this cable. It is ideal for budget-conscious buyers who refuse to compromise on audio quality and durability.

When to Use Toslink Cables: Toslink (fiber-optic) cables are best used for digital audio connections where electromagnetic interference is a concern. They excel in environments with multiple electronic devices, such as entertainment centers with numerous components.

Installation Tips: Locate the Toslink digital audio output on your TV or audio source device, typically labeled as 'Optical Out' or 'Digital Out.' Remove the protective caps from both ends of the cable before connecting. Insert the male connectors firmly into the Toslink ports until you hear a click. Avoid bending the cable sharply, as this can damage the fiber-optic core inside.

Compatibility Check: Before purchasing, verify that your TV, soundbar, or audio receiver has a Toslink optical input port. Most modern televisions, soundbars, Blu-ray players, and gaming consoles include this connection type as standard.

The Syncwire 3.5mm Nylon Braided Aux Cable is a premium audio connector designed for anyone who refuses to compromise on sound quality or durability. Whether you're connecting your smartphone to a car stereo, linking headphones to a tablet, or routing audio to home speakers, this universal cable works seamlessly with any device featuring a standard 3.5mm aux port.

What sets this cable apart is its engineering excellence. The 24K gold-plated connectors eliminate signal loss and noise interference, delivering the clear, stereo sound quality that audiophiles and casual listeners alike appreciate. The nylon braided exterior isn't just for looks, it's a functional upgrade that survives over 15,000 bend cycles, making it several times more durable than standard rubber cables. Real-world testing confirms users experience zero static or crackling, with audio remaining consistent across cars, speakers, and headphones.

The design balances practicality with premium feel. At 3.3 feet, the cable is long enough to connect devices placed in various positions without excessive slack, yet compact enough to store without hassle. The braided construction prevents the tangling nightmare common with cheaper alternatives, while double shielding guards against electromagnetic interference that degrades audio in noisy environments like vehicles.

The main limitation is incompatibility with certain protective cases like Lifeproof and OtterBox models, requiring case removal for connection. Additionally, a small percentage of users noted the physical length felt marginally shorter than expected, though functionality remained unaffected. These minor drawbacks are far outweighed by the cable's performance and longevity.

For the price, this represents exceptional value. Backed by a 3-year warranty and responsive customer service, the Syncwire aux cable is the smart choice for anyone tired of replacing flimsy, unreliable audio connectors. It's an investment in consistent, high-quality audio that actually lasts.

Physical Specifications: Connector Type: 3.5mm Stereo Jack (Male-to-Male), Cable Length: 3.3 feet (1 meter / 39.37 inches), Color: Black, Design: Nylon Braided with Double Shielding, Item Shape: Round

Durability & Performance: Bend Lifespan: 15,000+ cycles, Connectors: 24K Gold-Plated, Shielding: Double Layer for interference protection, Tangle-Free: Yes, Braided exterior prevents kinking

Compatibility: Universal 3.5mm aux port compatibility including iPhone, iPad, iPod, Android smartphones, tablets, laptops, MP3 players, car stereos, home stereos, speakers, headphones, and all audio devices with standard 3.5mm jack. Compatible brands: Sony, Samsung, HTC, Motorola, LG, Nokia, Beats, and many others

Package Contents: One 3.5mm Premium Aux Cable, 3-Year Warranty Card, User Guide, Customer Service Support

Model Information: Brand: Syncwire, Model: SW-SC017, Manufacturer: Leaderment International Group Co., Ltd, UPC: 711841538484

Who Should Buy This Cable? Anyone needing a reliable, long-lasting audio cable will appreciate the Syncwire's build quality and performance. It's perfect for daily car use, home audio setups, portable speakers, and anyone who's frustrated with cheap cables that tangle, break, or produce static.

Length Considerations: The 3.3-foot length works well for most situations, including connecting phones to car stereos, linking devices to nearby speakers, and headphone use. If you need significantly longer reach, consider whether a 6-foot alternative might suit your setup better.

Case Compatibility Note: Before purchasing, verify your phone case isn't a Lifeproof or OtterBox model, as these protective cases may prevent proper cable connection. You'll need to remove the case temporarily to use this cable.

Value Assessment: At this price point, you're getting premium materials (24K gold connectors, nylon braiding, double shielding) and proven durability that typically costs significantly more. The 3-year warranty demonstrates manufacturer confidence in longevity.

Best Use Cases: Optimal for car audio systems, home stereo connections, portable speaker linking, headphone replacement cords, and any permanent or semi-permanent audio installation where reliability matters.

The UGREEN 3.5mm aux cable is a straightforward solution for anyone who needs reliable audio connectivity without sacrificing sound quality. Whether you're connecting your smartphone to a car stereo, linking a tablet to portable speakers, or patching together a home audio setup, this cable delivers the goods at a price that won't strain your wallet.

What sets this cable apart from generic alternatives is its engineering. The silver-plated wire core improves conductivity compared to standard copper, resulting in clearer treble and more defined bass. The double-layer shielding effectively eliminates external interference and ground noise that cheaper cables often introduce. Real-world testing by users with high-end audio gear confirms this advantage, with reviewers noting zero static even in challenging environments like car interiors where interference is common.

Build quality is exceptional for the price point. The nylon braided jacket is both protective and flexible, passing over 10,000 bending tests to ensure longevity. The 24K gold-plated connectors and sturdy brass shells resist corrosion and oxidation, meaning this cable will maintain its performance years into the future. The slim step-down connector design fits snugly into standard aux ports without forcing or damaging your devices.

The main limitation is that this is a standard 3.5mm TRS cable without microphone support, so it won't work for hands-free calling on devices that require TRRS connectors. Additionally, a small percentage of users reported quality control issues on longer variants, though the 3ft model shows consistent quality across reviews. You'll also need devices with functioning audio input/output ports for this cable to be useful.

Overall, the UGREEN 3.5mm aux cable represents excellent value for anyone seeking durable, high-fidelity audio connectivity. It outperforms generic alternatives, resists physical wear, and delivers clean audio across a wide range of devices. Highly recommended for daily use, travel, and professional audio applications.

Physical Specifications

Length: 3 feet (0.9 meters)
Connector Type: 3.5mm TRS male to male
Cable Jacket: Nylon braided with reinforced brass shells
Connector Material: 24K gold-plated with brass construction
Color: Black
Shape: Round

Audio Specifications

Frequency Response: 192 kHz
Data Transfer Rate: 24 bits per second
Wire Core: Silver-plated copper
Shielding: Double-layer for interference elimination
Connector Design: Slim step-down for universal fit

Durability Testing

Bending Cycles: 10,000+ tests passed
Tangle Resistance: Yes
Corrosion Resistance: Yes (gold-plated connectors)

Compatible Devices

Smartphones: iPhones, Android devices with standard 3.5mm aux ports
Tablets: iPads, Amazon Fire tablets, Android tablets
Audio Devices: Headphones, earphones, speakers, soundbars, amplifiers
Vehicle Systems: Car stereos and in-dash audio systems without Bluetooth
Computing: Laptops, desktop computers, portable DACs
Gaming: Steam Deck and other portable gaming devices

Important Compatibility Notes

This cable requires devices with functional audio output (line-out) or input (line-in) ports. It does not support microphone functions and is not compatible with 4-pole TRRS connectors used for hands-free calling. Verify your device has a standard 3.5mm auxiliary port before purchasing. The cable does not require audio converters or adapters for standard aux connections.