Best Audio Converters for Earphones, Mobiles & Computers

With the growing popularity of different types of audio devices like phones, computers, headphones, and more, there is a need for audio converters to allow compatibility between devices that use different audio jack standards. Audio converters, also known as audio adapters, fill this need by changing the type of audio connector (such as 3.5mm, or 2.5mm) to allow audio sources and headphones/earphones with different jack sizes to be used together. The audio adapter parts can be manufactured by CNC machining and injection molding techniques.

In this article, we will introduce four of the best audio converter options from DDHiFi, a renowned headphone adapter manufacturer. We’ll look at the features, specifications, and uses for each converter.

Production Process of Audio Adapter Transparent Shells/Housings

The main manufacturing process of the PC plastic shell of the headphone converters is injection molding, which includes these basic steps.
1. Design a 3D digital model of the shell using 3D design software based on product functionality and structural requirements.
2. Based on the digital model of the casing, use CNC machine tools to create precise plastic molds in cast iron or steel.
3. Use tools to polish the inner and outer surfaces of the mold, making the surface smooth and free of burrs.
4. Choose suitable PC plastics, such as non-toxic PCs.
5. Fix the modified mold onto the injection molding machine arm system.
6. Transport PC plastic particle raw materials to the melting equipment, heat and melt them into the plastic slurry.
7. In the closed state of the mold, the plastic slurry enters the predetermined mold chamber under high pressure.
8. The inside and outside of the mold are cooled together with the plastic, and the plastic gradually solidifies into shape.
9. After completing the cooling process, the product and the mold should be removed together for subsequent deburring processing.
10. The manufacturing process is completed by checking whether the product’s external dimensions meet the design requirements.

Where to Buy Audio Converters/Adapters?

DDHiFi is a well-established brand that specializes in producing high-quality audio adapters and accessories. With a focus on innovation, durability, and customer satisfaction, DDHiFi has earned a reputation for delivering exceptional products that meet the needs of audiophiles and music enthusiasts alike. Their products are designed to provide a seamless listening experience, ensuring that you get the most out of your audio equipment.

– High-Quality Materials: DDHiFi uses premium materials, such as stainless steel, copper, and gold, to ensure durability and corrosion resistance in their products.

– Compact and Lightweight Design: Many of DDHiFi’s adapters are designed to be compact and lightweight, making them easy to carry and use on the go.

– Wide Range of Products: DDHiFi offers a wide range of adapters and accessories, catering to different audio needs and applications.

– Durable and Long-Lasting: DDHiFi’s products are built to last, with a focus on durability and longevity to ensure that they withstand regular use.

– Easy to Use: DDHiFi’s adapters are designed to be easy to use, with simple and intuitive designs that make it easy to connect and disconnect your audio devices.

– Compatible with Multiple Devices: DDHiFi’s adapters are compatible with a wide range of devices, including cell phones, headphones, amplifiers, and computers.

– Affordable Prices: DDHiFi’s products are priced competitively, making them an affordable option for audiophiles and music enthusiasts.

– Excellent Customer Service: DDHiFi is known for providing excellent customer service, with a focus on customer satisfaction and support.

Best Audio Converters for Earphones, Mobile & Computers

DDHiFi DJ35A – 2.5mm Balanced Adapter

The DDHiFi DJ35A is a simple but effective 2.5mm female to 3.5mm male audio converter adapter. It allows headphones or earphones with a 2.5mm balanced connector to be used with devices that only have a standard 3.5mm audio jack like smartphones.

Advantages of DJ35A:

  • Compact design that won’t stick out too much from your audio source
  • Made from high-quality stainless steel and PC materials to be durable
  • Gold-plated copper connectors provide excellent conductivity
  • Affordable price for a basic yet reliable adapter

The DJ35A is perfect for use with smartphones, tablets, or other mobile devices. Its compact size means it won’t stick out too much when plugged in. Audio quality is also maintained through the use of higher-end materials.


Dimensions 0.51 x 0.35 x 0.33 inches
Uses Cell Phone
Materials Stainless steel (metal shell), PC (transparent shell), copper (plug)
Type Earphone Jack Adapter for 2.5mm to 3.5mm
Female Port 2.5mm
Plug 3.5mm
Weight about 2.5g

DDHiFi DJ35AG – 2.5mm Balanced F to 3.5mm M Adapter

The DJ35AG is a step up from the basic DJ35A adapter with a larger housing made of stainless steel and gold-plated connectors. It allows the same 2.5mm to 3.5mm conversion but with improved build quality and conductivity.

Advantages of DJ35AG:

  • High-quality stainless steel and transparent PC housing
  • Gold-plated copper connectors for minimal resistance
  • Slightly larger size fits more securely in audio jacks
  • Great for use with higher-end headphones and equipment

The DJ35AG is well-suited for linking audiophile-grade headphones and equipment with 3.5mm inputs, maintaining optimal audio quality through the chain.


Dimensions 1.26 x 0.51 x 0.33 inches
Uses Headphone, Amplifier
Materials Stainless steel (metal shell), PC (transparent shell), gold plated copper (plug)
Connector Type Stereo Audio
Color Gold
Female port 2.5mm
Plug 3.5mm

DDHiFi DJ35AR – Rhodium Plated 2.5 F to 3.5 M Adapter

For audiophiles looking for a premium audio adapter, the DJ35AR from DDHiFi utilizes rhodium plating. Rhodium is more expensive and rarer than gold, making for even better connectivity.

Advantages of DJ35AR:

  • Rhodium-plated connectors for unbeatable conductivity
  • Compact size that won’t interfere with bigger amplifiers
  • Stainless steel housing for stellar build quality
  • Great for serious headphone setups with high-impedance cans

The DJ35AR excels in desktop headphone amplifier applications thanks to its use of rhodium plating which leaves no loss in the audio path.


Dimensions 0.39 x 0.51 x 0.33 inches
Weight about 3.3g
Uses Desktop headphone amplifiers
Materials Stainless steel (metal shell), PC (transparent shell), rhodium-plated copper (plug)
Female port 2.5mm
Plug 3.5mm

DDHiFi DJ65A(AL) – 3.5mm Female to 6.35mm Male Adapter

For connecting headphones with 1⁄4″ (6.35mm) connectors to devices using 3.5mm ports, the DJ65A(AL) converter from DDHiFi is one of the best options.

Advantages of DJ65A(AL):

  • High-quality OCC cable and gold galvanized connectors
  • Stainless steel housing built to last
  • Perfect for use with studio monitor headphones
  • Maintains audio quality in the adapter link

The DJ65A(AL) is well-suited for applications like connecting larger headphones to a computer or portable amplifier with 3.5mm out.


Dimensions 0.40 x 0.59 x 0.72 inches
Female port 3.5mm
Materials OCC cable, Stainless steel (body), Gold galvanized copper (plug)
Plug 6.35mm
Weight about 8.6g

DDHiFi creates some of the best audio adapters and headphone jack converters on the market thanks to the use of high-quality materials like stainless steel, gold, and rhodium plating. Whether you need a basic adapter like the DJ35A or a more advanced solution like the DJ35AR, you can find an option suited to your specific needs. They are a top choice for any audiophile or music lover needing a headphone jack conversion.

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