putting 8 UCD in one case

ackcheng · 1st October 2006, 04:06 PM

Hi,

I am planning to put 8 x UCD180s in one for my HT project. They will be powered up by 2 sets of SPS80.

Any comment on how i should wire them up? I plan to place them vertical parellel to each other. Is this OK

ssanmor · 2nd October 2006, 09:43 AM

Only one comment...
For UcD180 use, the SPS80 PSU must be configured to +/-45V approx. Please tell us at time of ordering so we can do this modification (for free, of course). Ackcheng did, of course

If I were you, I would wire the modules with not too thick wire (1.5mm2 is ok) twisting the three leads (+, GND and -) together, and run the input leads as separate from the supplies and high current wires as possible, but that's common stuff, you know.

classd4sure · 2nd October 2006, 09:57 AM

Would you please care to explain your dislike of "too thick a wire"? Do you find it ruins the audio in some way, or did you simply recommend that because he's trying to wire 4 channels per supply?

Thanks

djQUAN · 2nd October 2006, 09:59 AM

probably that too thick is too difficult to twist together.

classd4sure · 2nd October 2006, 10:00 AM

It can be a real pain if you use solide core, stranded Litz is alright though

ackcheng · 2nd October 2006, 10:03 AM

Will certainly separate the power supply from the output. But I don't understand why UCD design the module with the power supply and output right next to each other?

classd4sure · 2nd October 2006, 10:04 AM

To keep loop area minimal, all inputs /outputs are taken from the same side, it actually reduces EMI.

The small signal high impedance inputs are still slightly apart from the high power connections

ackcheng · 2nd October 2006, 10:05 AM

I am going to use balanced input. I guess the ground of the audio signal should be separated from the chassis ground as well?

classd4sure · 2nd October 2006, 10:07 AM

Honestly, I found it doesn't make much a difference either way. Right now I have one connected to chassis and the other floating, it's been like that for a month and I haven't bothered to fix it... sounds the same. Might be different with a case though.

It won't hurt to try both, but I guess it'll depend on your source/ground loops etc too

ssanmor · 2nd October 2006, 10:09 AM

I would use not too thick wire because for the kind of power level you will get wit UcD180 you don't need too much section, the run will be too short to have any significant resistance, anyway.
And running / twisting 3 x 1.5mm2 flexible wire is much easier ;-)

1st October 2006, 04:06 PM	#1
ackcheng diyAudio Member Join Date: Dec 2003 Location: hong Kong	putting 8 UCD in one case Hi, I am planning to put 8 x UCD180s in one for my HT project. They will be powered up by 2 sets of SPS80. Any comment on how i should wire them up? I plan to place them vertical parellel to each other. Is this OK

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Need some help putting these speakers together	seth556	Multi-Way	1	21st May 2008 10:25 AM
Need help putting 6Z4 into PSU Designer	sbelyo	Tubes / Valves	5	2nd April 2008 12:38 AM
Putting an 8 ohm L-Pad for 6-ohm driver?	nobb	Parts	0	3rd June 2007 07:20 PM
225 hcca putting out dc	Clipped	Car Audio	20	6th March 2007 04:29 AM
need help putting a system together	optomos	Car Audio	2	4th April 2005 06:20 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd October 2006, 09:43 AM	#2
ssanmor diyAudio Member Join Date: Jan 2002 Location: Madrid	Only one comment... For UcD180 use, the SPS80 PSU must be configured to +/-45V approx. Please tell us at time of ordering so we can do this modification (for free, of course). Ackcheng did, of course If I were you, I would wire the modules with not too thick wire (1.5mm2 is ok) twisting the three leads (+, GND and -) together, and run the input leads as separate from the supplies and high current wires as possible, but that's common stuff, you know.

2nd October 2006, 09:57 AM	#3
classd4sure Account Disabled Join Date: Feb 2004	Would you please care to explain your dislike of "too thick a wire"? Do you find it ruins the audio in some way, or did you simply recommend that because he's trying to wire 4 channels per supply? Thanks

2nd October 2006, 09:59 AM	#4
djQUAN diyAudio Member Join Date: May 2004 Location: manila	probably that too thick is too difficult to twist together.

2nd October 2006, 10:00 AM	#5
classd4sure Account Disabled Join Date: Feb 2004	It can be a real pain if you use solide core, stranded Litz is alright though

2nd October 2006, 10:03 AM	#6
ackcheng diyAudio Member Join Date: Dec 2003 Location: hong Kong	Will certainly separate the power supply from the output. But I don't understand why UCD design the module with the power supply and output right next to each other?

2nd October 2006, 10:04 AM	#7
classd4sure Account Disabled Join Date: Feb 2004	To keep loop area minimal, all inputs /outputs are taken from the same side, it actually reduces EMI. The small signal high impedance inputs are still slightly apart from the high power connections

2nd October 2006, 10:05 AM	#8
ackcheng diyAudio Member Join Date: Dec 2003 Location: hong Kong	I am going to use balanced input. I guess the ground of the audio signal should be separated from the chassis ground as well?

2nd October 2006, 10:07 AM	#9
classd4sure Account Disabled Join Date: Feb 2004	Honestly, I found it doesn't make much a difference either way. Right now I have one connected to chassis and the other floating, it's been like that for a month and I haven't bothered to fix it... sounds the same. Might be different with a case though. It won't hurt to try both, but I guess it'll depend on your source/ground loops etc too

2nd October 2006, 10:09 AM	#10
ssanmor diyAudio Member Join Date: Jan 2002 Location: Madrid	I would use not too thick wire because for the kind of power level you will get wit UcD180 you don't need too much section, the run will be too short to have any significant resistance, anyway. And running / twisting 3 x 1.5mm2 flexible wire is much easier ;-)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)