Coaxial Cables: Our Top Picks and a Complete Guide to Choosing the Right One and Understanding Sound Quality Differences
Coaxial cables (coaxial) influence the quality of audio and video transmission. At first glance, they all seem the same, but the internal structure and materials dramatically change sound resolution and noise immunity.
This article thoroughly explains how to choose the right coaxial cable without failure, satisfying both beginners and enthusiasts, along with carefully selected recommended models.
What is a Coaxial Cable?
A coaxial cable is a type of shielded electrical cable used for telecommunications, characterized by a structure where the "center conductor" and "outer conductor" share the same axis. This unique structure makes it resistant to external electromagnetic noise, allowing it to stably transmit high-frequency signals over long distances.
Basic 4-Layer Structure
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Inner conductor (core wire): The central copper wire that actually carries electrical signals (audio and video).
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Insulator: A layer that encloses the inner conductor and prevents contact with the outer conductor. The material affects signal transmission efficiency.
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Outer conductor (shield): Composed of braided wire or metal foil. It acts as a "shield" to block external noise and protect the signal.
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Outer sheath (jacket): The outermost cover that protects the entire cable. It affects durability and flexibility.
Why is it good for audio and video?
Coaxial cables are precisely manufactured so that their "impedance (characteristic electrical resistance)" remains constant from the design stage. This allows them to faithfully transmit fast and delicate signals, such as digital audio signals and TV video signals, without "reflection" or "distortion."
Main Applications
Coaxial cables are widely used in various settings, from homes to professional environments, due to their high transmission efficiency and noise immunity. The main applications are as follows:
1. Digital Audio Transmission (S/PDIF)
Used in high-end audio and home theater systems to connect CD players, network receivers, and DACs (D/A converters).
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Connector type: Primarily "RCA plug" or "BNC plug"
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Advantages: Compared to optical digital (Toslink) cables, signal attenuation is less, making it attractive for enjoying more powerful and solid sound quality.
2. For TV broadcast reception
Used to transmit terrestrial, BS, and CS broadcast signals received by an antenna to a TV or recorder.
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Connector type: "F-type plug (screw-on/push-on)"
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Advantages: Can efficiently transmit high-frequency signals, enabling stable viewing with reduced image distortion and noise.
3. Video transmission and surveillance cameras
Also used in professional video production (SDI transmission) and for transmitting security camera footage to monitors in homes and stores.
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Connector type: Primarily "BNC plug"
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Advantages: Image quality does not degrade easily even over long distances, and the locking connection (in the case of BNC) provides reliability, preventing accidental disconnection.
How to Choose a Coaxial Cable: 3 Important Points
To correctly transmit digital signals, check the following points:
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Choose "75Ω" impedance For digital audio (S/PDIF) and video transmission, 75Ω is the global standard. If this deviates, signal reflection (jitter) will occur, causing sound quality degradation.
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Conductor material (OFC or silver-plated)
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OFC (Oxygen-Free Copper): Natural and flat. Ideal for those who want to faithfully reproduce the original sound.
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Silver-plated/Pure silver: Good high-frequency extension, suitable for those who prefer a vibrant sound with high resolution.
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Shielding strength Digital signals are susceptible to high-frequency noise. Choosing cables with a "double or triple shield" structure, such as braided shielding or aluminum foil, will enhance the quietness of the background.
Understanding the Japanese Standard "JIS"
The most familiar standard in Japanese video and communication fields is the JIS standard. For example, CANARE's classic cable "L-3C2VS" follows this naming convention.
How to Interpret JIS Standard Names
Understanding the structure of the name allows you to tell at a glance whether the cable is suitable for your equipment.
|
Item |
Example Value |
Content |
|
Outer diameter of insulation |
3 |
Approximate outer diameter (mm) of the insulation (part wrapping the core wire) |
|
Characteristic impedance |
C |
C = 75Ω (for video), D = 50Ω (for wireless/communication) |
|
Insulator material |
2 |
2 = Polyethylene (PE), 4 = Foamed Polyethylene |
| Braided shield | V |
V = Single braid, W = Double braid |
Key Point! Most AV and broadcast equipment in Japan is designed in accordance with this JIS standard. For example, connectors (BNC plugs) are also categorized as "for 3C" and "for 5C," so matching the standard is the general rule.
Differences with Overseas Manufacturers (Belden, etc.)
Meanwhile, internationally renowned overseas manufacturers such as Belden use their own model numbers (1694A, 1505A, etc.).
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Not JIS standard: Belden is an American manufacturer, so its designs and nomenclature are primarily based on US military standards (MIL standards) or proprietary naming.
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Compatibility check required: You need to check the specifications (e.g., Belden's 1694A is equivalent to JIS 5C) and confirm the impedance and outer diameter to select the appropriate connector.
Onkodo's Carefully Selected Coaxial Cable Recommendations
CANARE L-3C2VS Digital Coaxial RCA Cable
Features: This is a 75Ω coaxial cable compliant with JIS standards. Its main feature is the use of stranded wire for the core, making it extremely soft and easy to handle. It boasts high Japanese reliability, having been loved for many years in professional settings such as broadcasting stations.
Points: Ideal for digital audio (S/PDIF) connections. The cable's flexibility allows for smooth wiring even in confined spaces behind equipment. It offers high quality and excellent cost-performance, making it a recommended standard choice for everyone.
Cable：CANARE L-3C2VS
Price: From 3,200 yen
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MOGAMI 2964 Digital Coaxial RCA Cable
Features: This is a 75Ω coaxial cable featuring Mogami's unique double-shielded construction. The high-purity OFC conductor minimizes transmission loss and noise. Despite its slim 4.8mm outer diameter, it offers high bending resistance and extremely flexible handling.
Points: Its overwhelming cost performance and accurate, uncolored sound are its greatest appeals. Its flexibility and ease of use make it ideal for wiring in confined spaces behind equipment. It is a highly trusted reference cable for both professionals and amateurs when in doubt.
Cable：MOGAMI 2964
Price: From 2,650 yen
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ONKODO 1505A Low-Loss Digital Coaxial BNC Cable
Features: A 75Ω coaxial cable using the world-standard Belden 1505A. It features a 20AWG solid core conductor and a double-layered shield of aluminum foil and high-density braid, boasting high transmission efficiency that suppresses signal attenuation and thoroughly blocks external noise.
Points: Ideal for word clock and DAC connections where precise synchronization is required. It brings out clear sound contours and rich sonic information. The astonishing cost-performance of professional-grade performance, meticulously assembled by ONKODO, is a major draw.
Cable：BELDEN 1505A
Price: From 2,680 yen
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CANARE L-3C2VS Digital Coaxial BNC Cable
Features: A 75Ω professional coaxial cable compliant with JIS standards. Due to its "stranded (S)" core wire structure, it lacks the typical stiffness of coaxial cables, making it extremely flexible. It is a reliable Japanese product standardly adopted by broadcasting stations and studios.
Points: Its outstanding flexibility makes it durable and resistant to bending, even when wiring in confined spaces behind equipment or in mobile environments. With its secure locking BNC plug, it is ideal for critical connections such as professional video transmission and word clock synchronization where no errors are permissible.
Cable：CANARE L-3C2VS
Price: From 2,950 yen
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Summary: Achieve the Best Experience with the Perfect Coaxial Cable for You
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For guaranteed reliability: Choosing a JIS-compliant manufacturer like Canare ensures that specifications are clear from the model number, and compatible connectors are easy to find, preventing mistakes.
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For unique sound and image quality: Adopting an international brand like Belden, after carefully examining its specifications (such as 75Ω impedance), is also a valid approach.
Coaxial cables are the "unsung heroes" that maximize the potential of digital audio and video systems.
By simply changing one cable, you might notice subtle nuances in sound that were previously inaudible or see clearer images. First, get a cable that suits your environment and experience the difference.
