Yushan Cable Risers
We’re always looking for new ways to provide solutions to system problems. We have very clever technologies that form the core of our extensive range of cables but we thought about other ways of applying that technology – and came up with the Yushan Cable Risers!
The Yushans can be used with Vertex cables of course, to add even more performance. But we think the main ‘opportunity’ for customer’s is to use them with non-Vertex cables. Where a large investment has been made in cables from other good brands, it might be an expensive financial decision to trade those in for a new set of Vertex cables. So a set of the Yushan risers can be used to add some of our acoustic and RFI treatment to just about any cable out there.
The Yushan’s come in a set of six riser blocks, with six top clamps and 12 stretch loops. They can be used with any type of hi-fi cable which would normally lie on the floor. These would typically be mains leads and speaker leads, although very long analogue and digital interconnects which may lie on the floor, such as in an active speaker system, will also benefit.
Each cable riser block is a hollow cube containing a complex acoustic labyrinth made out of fast acoustic materials. And importantly this is carefully bonded with an impedance matching glue to the underside of the top surface of the block – this forms the primary acoustic route into the labyrinth. Furthermore, combined into the construction of the labyrinth are two different types of EMI absorptive compounds. Note that the oak insert in the top of the blocks is only 3mm thick so that the labyrinth and the EMI absorbent compounds are very close to the clamped cable.
When a cable is clamped to the block it’s acoustically coupled to the block. And although the cable has insulation layers and outer sleeving, this is all surprisingly acoustically conductive – this is why cable dressing has such an effect on audio quality (see here). So when clamped, acoustic energy within the cable sees a low impedance route into the labyrinth where it’s then broken down by destructive interference. This results in a significantly lower level of acoustic vibration within the cable, and within the circuits at either end of the cable too.
The passive EMI absorption compounds within the block are also close to the conductors, thus they are in the electro-magnetic field that will be there if the cable is carrying radio frequency noise. These high-frequency alternating currents might be coming from the mains, the system itself or from airborne signals such as wifi. The point is that they continually switch from currents in the conductors, to radiated fields, and back again – your leads are antennas constantly receiving and transmitting, and passing these signals back into the circuits of your system of course. If you place properly designed radio absorption compounds within these fields, they continually absorb the energy from these fields – and that drains energy from the alternating currents that are associated with the fields.
Deciding where to position the cable risers should be a process of experimentation. From our general experience we suggest you treat your speaker cables first, then mains leads, then long interconnects (if required). But systems vary in the way they respond, so you should experiment with positions and combinations to find what gives the best results.
But what about sound quality? Well, the Yushans bring an immediate improvement in all areas of the performance. More clarity, definition and better imaging, particularly when the music gets complex. Timing and separation are better and overall the system has much more control – the reduction in intermodulation is clearly evident and the benefit is it’s much easier to follow all the different elements in the mix.