Internal wiring cables

Internal wiring cables for specific audio applications

Internal wire connects components, contact assemblies, circuit boards, loudspeaker parts or tonearm elements inside a device. Unlike a finished interconnect, it is normally a material used to build or repair a particular connection. The result depends on the circuit, routing, insulation and termination quality. Choosing by brand or conductor metal alone is therefore insufficient: first establish the electrical function and the mechanical conditions within the equipment.

This category includes Van den Hul CS-12, MCS-150MS variants and MSS-7. They address different wiring applications and are not interchangeable simply because they are flexible. A fine conductor near a moving tonearm bearing and a wire used in a loudspeaker connection operate under different conditions. Confirm the exact model, colour, selling unit and equipment requirements before ordering materials for the repair or assembly.

Identify the circuit before choosing wire

One audio device can contain low-level signal connections, power circuits, control wiring and outputs feeding a load. Their requirements differ. In a low-level path, the return conductor, screening and position relative to interference sources matter. A circuit carrying substantial current also requires consideration of conductor size, resistance, heating and terminal suitability. The broad description audio wire does not establish an acceptable operating condition for every internal connection.

Use the service documentation or the device design as the reference. Before removing an original wire, record its route, connection points, supports and identification. Increasing its thickness without checking the terminals, or moving it to a different part of the enclosure, may introduce a new problem. Internal audio wiring material should not automatically be treated as mains cable either; the requirements of that particular circuit need separate confirmation.

CS-12 and fine tonearm wiring

The official Van den Hul Hi-Fi Tips and Hints document mentions CS-12 HF among wires used for internal loudspeaker wiring and gives that version a cross-section of 2.96 mm². This value belongs to the identified version. Before ordering the catalogue's CS-12, match the full specification to the required part rather than transferring data between similar product names.

The manufacturer's phono cartridge documentation identifies MCS-150 M and MSS-7 as tonearm wiring options. The shop lists MCS-150MS in separate product variants, so the commercial designation should be matched with supplier documentation. Flexibility and suitability for a restricted space are central to this application. A larger conductor is not a universal upgrade when the wire forms part of a sensitive moving assembly.

Why tonearm movement changes the requirements

Internal tonearm wiring passes through limited space and should not introduce unwanted resistance to movement. A stiff or poorly routed wire can pull at certain positions even when an electrical continuity check shows no fault. Inspect the behaviour throughout the intended range of travel. The route and service length need to suit the actual tonearm construction, rather than a generic arrangement copied from a superficially similar mechanism.

Replacing internal tonearm wire is different from replacing the external connection between a turntable and phono stage. The external cable has its own connectors, screening and mechanical protection. One fine insulated conductor is not a ready-made screened phono lead. If the task concerns the external connection, identify the turntable output, grounding arrangement and cartridge requirements before selecting the construction of the complete cable assembly.

Cross-section, outside diameter and flexibility

Conductor cross-section describes the area of conductive material. Outside diameter includes insulation and determines whether the wire fits through an opening or channel. These are separate measurements. A conductor with the required cross-section may not fit because of its insulation, while a small outside diameter does not prove sufficient conductor size for a given current. Check both values together with the termination arrangement.

Flexibility depends on conductor construction and insulation as well as overall thickness. A fixed jumper and a section beside a moving part have different mechanical requirements. Stranded construction does not establish unlimited resistance to every type of repeated bending. Provide appropriate supports, a smooth route and protection from sharp edges. Pay particular attention to the point where the conductor leaves its insulation next to a terminal or solder joint.

Insulation and routing inside the enclosure

Insulation must suit the electrical conditions, temperature, contact with neighbouring parts and assembly method. A material name or a halogen-free description does not independently confirm every required property. Routes near hot components, moving mechanisms or metal edges need suitable protection in the design. An improvised extra wrap is not a substitute for selecting the right wire and routing it appropriately within the device.

The enclosure lid should not pinch the wire, and servicing a neighbouring part should not pull on its contacts. Allow a justified service loop without excessive surplus length. Unnecessary loops can obstruct access and change the relationship between signal wiring and other circuits. Photographs of the original assembly and an accurate drawing help preserve the intended layout during repair, especially where several similar connections meet at one point.

Screening and the signal return path

A single insulated wire should not automatically be described as a screened cable. If a circuit requires screening, the screen construction and its connections belong to the design. Inside equipment, the location of interference sources, the signal return path and enclosure connections all matter. Replacing one wire without understanding those relationships does not guarantee the removal of hum. A faulty contact or circuit arrangement may be the actual cause.

Do not rely on colour alone to identify an existing conductor. Previous repairs may have changed the colours, and a different device may use another scheme. Compare markings with documentation and test results. Consistent colour coding is useful in a new assembly, but it supports the wiring drawing rather than replacing it. Maintain clear identification wherever several similar conductors are terminated close together.

Preparing ends and making terminations

The preparation method depends on the exact wire and contact. Poor stripping can damage a very fine conductor before soldering begins. Do not apply one process to every material merely because the products share a shop category. Check the manufacturer's insulation preparation and assembly guidance, together with the terminal size, solder pad or miniature clip requirements. The chosen wire needs to work with the actual connection hardware.

A termination should not carry the entire mechanical load without the support intended by the design. After assembly, inspect the nearby insulation and check for unintended bridges or loose strands. In a tonearm, also confirm that the contact clips suit the cartridge pins. Excessive insertion force is not a way to correct the wrong connector size and may damage adjacent parts of the delicate assembly.

Calculating lengths and the order contents

Measure the actual route of each conductor, not just the straight distance between two points. Include a reasonable allowance for end preparation and service access. If four separate conductors are needed, one metre in a single colour is not equivalent to a completed four-wire set. Check the selling unit, available variants and whether contacts are included. This is especially important for wire sold by length.

A small schedule showing assembly location, length, colour and contact type makes the order easier to verify. When repairing several identical devices, keep a tested sample or an assembly drawing to reproduce the result consistently. The wire itself is only part of the work: appropriate contacts, supports, tools and checks are also required. Comparing price per metre alone does not describe the full process of restoring the connection.

Checks after installation

Before normal operation, verify the wiring against the diagram, continuity, the absence of unintended shorts and the mechanical arrangement. For moving assemblies, repeat the relevant checks at different working positions. After closing the enclosure, confirm that the route has not shifted and no insulation is trapped. Electrical tests and initial power-up should follow the equipment service procedure, particularly when internal power circuits have been involved.

A practical repair planning example

To restore a connection from a loudspeaker terminal panel to its original internal assembly, first record polarity, routing and termination types. Check whether the selected insulation fits the available space and whether the wire can be supported clear of moving parts. Calculate each conductor's length with servicing access in mind. After replacement, compare the completed circuit with the original drawing and test the connections. This preserves the intended function instead of turning a straightforward repair into an unverified redesign.

Frequently asked questions

Does silver wire guarantee better sound? The material alone does not establish the result in a particular system. Correct circuitry, suitable parameters, sound assembly and freedom from defects remain essential.

Is thicker wire better for a tonearm? Not necessarily. Free movement, installation space and contact compatibility must be maintained.

Can individual wires replace an external phono cable? Such an assembly requires separate design of screening, connectors and mechanical protection. Internal wire is not a finished substitute.

What information is needed for selection? Identify the device, circuit purpose, required length, available space, contact hardware and original wiring specification.