Last night I home-visited "Simcity", a friend in Hong Kong who is a fans of CH Precision.
Here is his system : Sonis Faber Amati Futura bi-amped by two CH M1, P1 for his Air Force One, C1 as dac for a Denon cdp acting as cd transport and a X1 supplying C1 & P1. The hifi racks are Artesania Exoteryc.
I visited him a few months ago and noticed that the cd playback last night was never so good. I asked him to share a few tricks/tweaks with me.
He told me that they looked nonsense and risky but they worked!
Here they are :
1. The chassis of CH is made similar to those of Goldmund. Actually both C & H were once Goldmund employees. There are vertical tunnels at the 4 corners, through them stainless steel spiked rods can be inserted, for anchoring the components on racks or for stacking them up. These wells are covered by circular aluminum alloy screwable plates with rubber O-rings when not in use.
My friend demoed to me that installing or remove all or some of the plates affected sonic performance. In his system, all M1 plates had to be installed whereas all X1 plates had to be removed to get good sound. For the C1, he removed one of the 4 plates.
Was the effect our hallucination? Haha.
2. There are small telfon cups on each levels of Artesania Exoteryc rack in direct contact to and support the bottom plates of hifi components.
There are several varieties : thin black felt on top, thick felt and no felt :
My friend told me that the heaviest M1 needs the thick felt cups whereas the other two cups are for less heavy CH components.
Of course the positioning of the cups needs adjustment by his ears.
3. The X1 can accommodate 2 plug-in cards so as to supply 2 CH components.
The M1 can accommodate 2 cards for true bi-amping.
However my friend tested and found that installing 2 cards would worsen the sonic performance. This is particularly serious for the M1 so he removed the 2nd card.
For the X1, he now uses it either for his C1 or P1. His each listening sessions are now either CD or LP.
4. I posted a thread before and mentioned that Taiko Audio Setchi D2 groundbox is a particularly good tweak for CH products.
https://www.whatsbestforum.com/threads/yet-another-groundbox-but-this-setchi-is-quite-special.24081/
I also mentioned that replacing the included 9V battery with Energizer Lithium 9V battery improved the sonic effect a lot.
https://www.whatsbestforum.com/threads/infinite-imagination-tweaking-the-battery-of-setchi-groundboxes.27993/#post-589851
Last night we replaced the batteries of his 2 Setchis with Energizer Lithium batteries. My frd had his jaw on the floor in less than 1 minute!
5. I leave this controversial and risky tweak to the last.
Please think twice before testing or using this tweak. It can be dangerous!
I mentioned several times before that most protection circuits inside audio components worsen the sonic performance.
If you look into the control menu of the M1, you will find an inconspicuous item of "protection circuit".
It can be disabled. The sonic diff is very audible.
Dare to try this tweak? Haha
Enjoy!
Here is his system : Sonis Faber Amati Futura bi-amped by two CH M1, P1 for his Air Force One, C1 as dac for a Denon cdp acting as cd transport and a X1 supplying C1 & P1. The hifi racks are Artesania Exoteryc.
I visited him a few months ago and noticed that the cd playback last night was never so good. I asked him to share a few tricks/tweaks with me.
He told me that they looked nonsense and risky but they worked!
Here they are :
1. The chassis of CH is made similar to those of Goldmund. Actually both C & H were once Goldmund employees. There are vertical tunnels at the 4 corners, through them stainless steel spiked rods can be inserted, for anchoring the components on racks or for stacking them up. These wells are covered by circular aluminum alloy screwable plates with rubber O-rings when not in use.
My friend demoed to me that installing or remove all or some of the plates affected sonic performance. In his system, all M1 plates had to be installed whereas all X1 plates had to be removed to get good sound. For the C1, he removed one of the 4 plates.
Was the effect our hallucination? Haha.
2. There are small telfon cups on each levels of Artesania Exoteryc rack in direct contact to and support the bottom plates of hifi components.
There are several varieties : thin black felt on top, thick felt and no felt :
My friend told me that the heaviest M1 needs the thick felt cups whereas the other two cups are for less heavy CH components.
Of course the positioning of the cups needs adjustment by his ears.
3. The X1 can accommodate 2 plug-in cards so as to supply 2 CH components.
The M1 can accommodate 2 cards for true bi-amping.
However my friend tested and found that installing 2 cards would worsen the sonic performance. This is particularly serious for the M1 so he removed the 2nd card.
For the X1, he now uses it either for his C1 or P1. His each listening sessions are now either CD or LP.
4. I posted a thread before and mentioned that Taiko Audio Setchi D2 groundbox is a particularly good tweak for CH products.
https://www.whatsbestforum.com/threads/yet-another-groundbox-but-this-setchi-is-quite-special.24081/
I also mentioned that replacing the included 9V battery with Energizer Lithium 9V battery improved the sonic effect a lot.
https://www.whatsbestforum.com/threads/infinite-imagination-tweaking-the-battery-of-setchi-groundboxes.27993/#post-589851
Last night we replaced the batteries of his 2 Setchis with Energizer Lithium batteries. My frd had his jaw on the floor in less than 1 minute!
5. I leave this controversial and risky tweak to the last.
Please think twice before testing or using this tweak. It can be dangerous!
I mentioned several times before that most protection circuits inside audio components worsen the sonic performance.
If you look into the control menu of the M1, you will find an inconspicuous item of "protection circuit".
It can be disabled. The sonic diff is very audible.
Dare to try this tweak? Haha
Enjoy!
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