UcD400 Q & A - Page 64

richie00boy · 11th March 2005, 08:02 AM

Shouldn't be a problem, and if you got a good, proper isolation transformer with a centre tapped (balanced) output then you can connect it in balanced mode to the UcD

SSassen · 11th March 2005, 12:44 PM

I was wondering when we'll see the uCD700/1000? I'm working on a new subwoofer design that needs at least 500-watts of power in 4-ohms. I'm currently using the Thommessen SW6.0 amplifier which starts clipping if pushed to the limit.

If I look at the specs of the uCD400 module it will not handle the load and I have not seen any other digital amp that has a higher power rating. I'll just be using the amp, and a Thommessen Subway X active crossover to feed it.

Regards,

Sander Sassen

ghemink · 11th March 2005, 12:50 PM

Quote:

Originally posted by SSassen
I was wondering when we'll see the uCD700/1000? I'm working on a new subwoofer design that needs at least 500-watts of power in 4-ohms. I'm currently using the Thommessen SW6.0 amplifier which starts clipping if pushed to the limit.

If I look at the specs of the uCD400 module it will not handle the load and I have not seen any other digital amp that has a higher power rating. I'll just be using the amp, and a Thommessen Subway X active crossover to feed it.

Regards,

Sander Sassen

You can use two UcD400 modules in bridge configuration to get 800W in 4 Ohm, I plan to do that.

Gertjan

ewildgoose · 11th March 2005, 01:41 PM

Note also that the UCD is 400W into 4 ohms... You can also look at the Zappulse modules which have a somewhat higher power rating for around the same price (and they sound pretty good as well). You can bridge those just like the UCD and get scary power levels...

richie00boy · 11th March 2005, 02:33 PM

You can't bridge a 4 ohm load on UcD400 and get 800W. The current limit on the UcD400 is 15 amps. With a 4 ohm load this equates to 900W peak, or 450W RMS.

As Ed has said, take a look at LC Audio ZAPpulse amps, they have oodles of power capacity.

UrSv · 11th March 2005, 02:43 PM

The new modules had that increased to 20 A AFAIK. That gives 800 W.

Jan-Peter · 11th March 2005, 03:05 PM

Quote:

The new modules had that increased to 20 A AFAIK. That gives 800 W

But this 20A is piek not effective.............!!

Regards,

Jan-Peter

UrSv · 11th March 2005, 03:16 PM

Yes.

20*20*4/2 = 800 W RMS

or

20*20*4 = 1600 W peak.

richie00boy · 11th March 2005, 03:28 PM

Quote:

Originally posted by UrSv
The new modules had that increased to 20 A AFAIK. That gives 800 W.

I thought that the old limit was 10A and this has now been increased to 15A.

UrSv · 11th March 2005, 04:08 PM

Quote:

Originally posted by richie00boy

I thought that the old limit was 10A and this has now been increased to 15A.

Jan-Peter should confirm but as far as I remember the old one was 15 and the new 20 A.

Edit, found post 440 where JP lists the changes:
http://www.diyaudio.com/forums/showt...560#post556560

11th March 2005, 08:02 AM	#631
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Shouldn't be a problem, and if you got a good, proper isolation transformer with a centre tapped (balanced) output then you can connect it in balanced mode to the UcD __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

11th March 2005, 02:33 PM	#635
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	You can't bridge a 4 ohm load on UcD400 and get 800W. The current limit on the UcD400 is 15 amps. With a 4 ohm load this equates to 900W peak, or 450W RMS. As Ed has said, take a look at LC Audio ZAPpulse amps, they have oodles of power capacity. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

11th March 2005, 02:43 PM	#636
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	The new modules had that increased to 20 A AFAIK. That gives 800 W. __________________ UrSv Those who say it can't be done should not stop those who are doing it.

11th March 2005, 03:16 PM	#638
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	Yes. 20204/2 = 800 W RMS or 20204 = 1600 W peak. __________________ UrSv Those who say it can't be done should not stop those who are doing it.

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11th March 2005, 12:44 PM	#632
SSassen diyAudio Member Join Date: Mar 2005 Location: Purmerend	I was wondering when we'll see the uCD700/1000? I'm working on a new subwoofer design that needs at least 500-watts of power in 4-ohms. I'm currently using the Thommessen SW6.0 amplifier which starts clipping if pushed to the limit. If I look at the specs of the uCD400 module it will not handle the load and I have not seen any other digital amp that has a higher power rating. I'll just be using the amp, and a Thommessen Subway X active crossover to feed it. Regards, Sander Sassen

11th March 2005, 01:41 PM	#634
ewildgoose diyAudio Member Join Date: Jan 2004 Location: London	Note also that the UCD is 400W into 4 ohms... You can also look at the Zappulse modules which have a somewhat higher power rating for around the same price (and they sound pretty good as well). You can bridge those just like the UCD and get scary power levels...

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