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Old 16th September 2009, 05:57 AM   #1
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Default CDPro2 9V modification

I assembled a CDPro2 transport from hifidiy.net. It sounds great on the start but as a DIYer, you always look for modification. The power supply is using two stages LM317. One 5V for CDPro2 (digital circuit), One 5V for onboard digital circuit and one 9V for CDPro2.

I changed the 5V power supply for CDPro2 to DEXA. The background becomes more quiet. Now my question is - would there be great improvement by changing the 9V supply? Bearing in mind that this 9V is only for the drive motor.

Catbag
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Old 20th September 2009, 07:58 AM   #2
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It seems no one has tried to modify the 9V for CDPro2 here, isn't it?
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Old 21st September 2009, 09:17 AM   #3
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My experience is that different 9V supplies can make a difference to the performance. I went from a plain vanilla LM317 reg to a full blown 1.2A shunt reg kindly designed by a friend of mine (I couldn't cope with doing that!). The improvement was fairly subtle but worth having. The bass was cleaner and felt a little more extended.

The 9V drives the motor and laser servos as far as I know so high current and good transient performance are what to look for.

Simon
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