There are three areas on the bottom face. The top one is the ventilation area with an arch shaped appearance. Then the second one is a box shaped part with the ventilation area on the side. Lastly, there is the base which has a relatively small area.
Please be careful as the ventilation area in the bottom should not be covered, as this will impair the cooling of the PS3. if you place the PS3 in an audio rack, please choose one that has an open back and allow more than 25cm clearance above the PS3. In the future the heating characteristic of the Cell chip will likely decrease, so the installation of the PS3 will become easier. Do not place anything around the ventilation area.
The optimum installation for sound quality can be achieved by placing the PS3 horizontally in an open space. For example, try a cabinet which has a rigid and secure top, if you do so, the sound will become more 'open'.
1. Addition of feet
The first modification is the addition of feet. Although there are small feet at each corner of the base, larger additional feet are required next to the original ones. These additional feet should be made of rubber and be more than 4mm high. The sound is improved by having a gap of more than 4mm, between the PS3 base and the rack surface.
The characteristic of rubber material used for the feet affects the sound quality. Material with high damping reduces noise and offers a high S/N ratio. Rubber material with higher elasticity can deliver a more lively, or active sound.
The feet shown in the picture at each corner (appear white) are the ones used for the TA-DA9100ES, but cut into quarters. Since a non-repulsion rubber is employed, the sound is improved with higher damping and less noise.
Double layered Sorbothane, is to be recommended as an alternative material. In this case to prevent the feet sticking to the surface, it is advisable to cover them with Teflon tape.
If possible, it's better to replace the original feet, as their location is near an area of structural strength. By doing so, the sound will become more defined.
2. Reinforcement of the base with glass epoxy PCB
Three pieces of this material are attached laterally and one piece is attached longitudinally on the base. As a result, the bottom part of the case is effectively reinforced.
This material should be 20mm wide single sided printed circuit board, made of glass epoxy before etching. In addition, there should be a 35micron thick copper layer on the opposite side.
For the laterally attached bards use two that measure 240mm in length and one in the middle that is 125mm in length.
The longitudinally attached board is placed on the box shaped part, in a central position, but closer to the side wall of the base as shown.
Please use double sided self-adhesive tape to fix these materials.
With this reinforcement, the 'boomy' sound characteristic of the low to mid frequency range is reduced. Furthermore, the bass definition and perception of rhythm is improved.
Unfortunately, I can't disclose the type of glass epoxy PCB and tape, as it used for development work. So, please experiment with your own sourced versions of these materials and you may be surprised at the results.
If you make a mistake, it's possible to remove the board material by carefully heating the tape with a hair dryer and gently peeling it back.
Different types of self-adhesive tape make a greater difference than the material of the PCB itself. So, please place a small piece of adhesive tape anywhere on the PS3 - this way you will understand the audio characteristic of the tape
3. Small width Teflon tape
The small piece of tape, which can be seen between the two long pieces of material around the centre of the base, is deliberately attached there. This is Teflon tape, the size is 6x55mm, the type number ASF110 and it's made by Chuko-Kasei. The overall thickness is 0.08mm, whilst the thickness of the Teflon is 0.05mm and the adhesive is 0.03mm. Since this tape is also used on the top and side, it is better to buy 20mm width type, so pieces can be attached side by side, if 40mm width is required.
Actually, the price of this tape is expensive, at around 10,000Yen per 10m roll. I saw that it was available in Akihabara, but might be obtained from a DIY shop such as 'Tokyu-Hands'.
"Tokyu Hands" is the diy shop which there is only in Japan. It resembles "home-depo" in a Japanese foreign territory. However, Teflon tape is an audio tuning item peculiar to Japan. An overseas diy shop will not handle a tuning item for audio . Overseas all of you please talk with an audio shop. kanai