D1.5 User Manual 10
3.3 Positioning your D1.5 SACD/CD player/transport
Your D1.5 SACD/CD unit’s four feet are tted with elastomer rings, ensuring both scratch-protection for the
surface on which the unit sits, as well as secure, non-slip positioning. That means that it is best to lift the D1.5
slightly when placing or repositioning it.
However, we have built a far more advanced mechanical grounding system into all CH Precision products. To use
this coupling system, simply take the following steps:
1. Place the D1.5 on the stable support on which you intend to use it. Make sure cooling air is able to freely ow
around the unit and that you have enough space above the unit to remove the top-caps and insert/adjust the
support spikes.
2. Gently lift the unit’s corners in turn and insert one of the polymer support disc under each foot (an AirWedge
or similar lifting bladder is ideal for this purpose). The foot’s elastomer ring should locate into the groove in
the support disc when they are properly positioned. With all four, polymer support discs in place, ensure that
they are all properly located and that the unit is stable. The polymer discs allow the unit to be positioned
easily and precisely.
3. Unscrew the D1.5’s four top covers using the provided suction cup. Be careful not to scratch their delicate
nish.
4. Insert an aluminum alloy/polymer adjustment spike into each of the shafts revealed.
5. Using the short screwdriver provided, gently rotate each spike clockwise. First you will feel it engage the
thread at the base of the shaft adjustment shaft, then you will feel resistance as it contacts the polymer disc
and starts to lift the D1.5.
6. Once you feel resistance on all four spikes, turn each one the same amount – two turns for example – to lift
the unit’s feet completely clear of the supporting discs. Check that the unit is stable and that the loading on all
four spikes is the same.
7. It is now important to level the D1.5 precisely, using a precision spirit level. This has a direct impact on the
unit’s musical performance, so take your time and get it just right.
8. Depending on the supporting surface, you may well achieve better results by removing the polymer support
discs so that the spikes contact the surface directly. This is very much a case of trial and error, but in general,
direct spiking works best on lossy, dispersive surfaces (wood-based, carbon-bre, composite or constrained
layer supports) while hard, reective surfaces such as granite, glass or marble will sound better with the
polymer discs acting as an interface.
When removing the discs to listen to the direct spike option, remember that the spikes
protrude below the D1.5’s feet. If you try to slide or reposition the unit, you may damage the
supporting surface, while direct spiking may also mark it.
9. Once you have decided on your preferred spiking arrangement (with or without the polymer discs) make sure
that you check that the D1.5 is still perfectly level and that the loading/resistance on the four spikes is equal.
10. If no CH Precision unit is to be stacked on top of the D1.5, replace the four top covers. Otherwise, insert the
four polymer stacking caps that are also provided. If placing another CH Precision unit on top of the D1.5, do
so with extreme care and ensure that the two are precisely aligned, in order to prevent damage to the D1.5’s
top-plate.
