About the Vertex AQ Roraima Mains Leads

The Vertex AQ mains leads, named Roraima, are usually the first Vertex leads that you will put into your system. We recommend that you study the Systematic Approach to understand how the Roraima mains leads should be used in a system context, but in essence the Roraima should be first because often mains faults are not only intrusive in obvious sound quality terms, but they also limit system transparency, masking potential improvements you might make later in other parts of the system.

roraima full white smallA Standard Roraima mains lead

The Roraimas are available in three main technology/performance levels which are summarised below:

1. Standard Roraimas – silver-plated OFC conductors and standard acoustic absorption in the module.
2. Silver Roraimas – solid-core silver conductors/Teflon tube insulation, standard acoustic absorption in the module.
3. HiRez Roraimas – solid-core silver conductors/Teflon tube insulation, enhanced acoustic absorption and EMI absorption/earth noise reduction in the modules, EMI absorptive tubing over the conductors/Teflon.

See side menu for full details of each type and variants.

The Basic Function of the Leads

The Roraima mains leads are all essentially the same in their general construction. They all comprise a high quality lead with a large box someway along its length. They are designed to carry out the three following functions:

1. To provide low impedance connections for live, neutral and ground to effectively deliver power and reduce ‘standing’ Radio Frequency noise.
2. To reduce the levels of structural vibration within the cable and the components to which they are connected.
3. To lower RFI levels within the mains supply and ground returns (‘plus’ and HiRez versions).

When we Describe Performance

When we describe the increasing performance of each item in a range (eg, Standard – Silver – HiRez), the description is given in the context of a system setup where each particular level is appropriate and cost effective. Where the performance of the entry-level product in that range is described, we are describing it in comparison to a typical ‘non-treated’ system. Where the higher performance products are being described, we are then giving that description in the context of a system that is reasonably well provisioned with Vertex equipment throughout the rest of the system. In other words, the hypothetical system is not being hampered by major faults in other areas, which would be the limiting factor. Rather, the system is well sorted and has ample latent performance headroom to realize the gains that the next product up the range is capable of delivering.

Silver Conductors and Teflon Tube Insulation

One of the main performance differentiators between the Standard cables and the Silver/HiRez cables is the conductors and insulation used. The Standard cables use silver-plated stranded copper with extruded PTFE insulation. The Silver/HiRez cables use solid-core silver in a ‘Teflon tube’ that means the dielectric is mostly air. Where these differences become very important is the way they enable us to deal effectively with the RFI noise problem. The superior surface of the silver and the use of Teflon (and air) as the insulator, lowers the impedance in the radio frequency range. And then we use this to our benefit when we consider our system configuration – if we employ our RFI filters and EMI absorption techniques, such as found in our Jayas and Tagas, the lower RF impedance of the better cables allows us to more effectively drain the RFI out of the main hifi components, back to those filter points.

So when considering an upgrade to the Silver or HiRez mains leads it is important to understand the role of the improved conductors and insulation, and how to use these benefits hand-in-hand with the correct use of Jaya filters, Tagas and Aletheia PSUs. You will find these reasons discussed further in the section for the Silver Roraimas.

Larger Modules and Enhanced Acoustic Absorption

The Standard and Silver Roraima cables have a module that measures 180mm x 105mm x 45mm (LxWxD). The HiRez cable has a module of the same width and depth but is 220mm long and this effectively enables us to include significantly more acoustic labarynth, and to construct it so that it’s more ‘complex’ and thus it has many more alternate acoustic paths to break down acoustic vibration more effectively.

A note about Routing and Positioning

Because of the physical construction of our cables you need to consider much more carefully the positioning and routing issues. And when deciding what length you may require, take account of the need to position the heavy acoustic absorption module in an appropriate position, probably on the floor.  This typically adds 0.5m to your requirement.


HR and HRplus Roraima cropped narrow medHiRez Roraima and HiRez Plus Roraima mains leads