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Old 24th March 2005, 11:38 AM   #1
diyAudio Member
Join Date: Mar 2005
Location: Gothenburg
Default ICE 1000A Q's

Hello guys!
I'm new here, and registered because I was hoping that maybe someone here could help me with power supply to my two ICE modules, 1000A.

As for now, I have ordered two transformers. They are made for me the way I want them. 800V, 230V primary lining, and two different secondary linings (one for feed, one for the driving curcuit).

As the modules want +120V (wants 135V max I believe), I designed the first secondary lining to 83V (83V x 1.414 x 1.04 - 2 = 120V).

The second secondary lining I'm not sure of, as I do not know if there is any stabiliser circuit on the module. Anyone know if there is?
I have designed it to 12V AC, which will give appr. +-15V DC.

What Voltage should I go for?

Rectifier bridges will be used of good Quality, and RIFA PEH will be used to the powerbank....

Thank you very much for your help.
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Old 25th March 2005, 06:53 AM   #2
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Join Date: Oct 2004
You can download all the spec's from
That's the product sheet and the data sheet
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Old 25th March 2005, 09:34 AM   #3
wytco0 is offline wytco0  United Kingdom
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Join Date: Apr 2004
Location: Hastings
I didnt realise these ICE modules were available, where can they be purchased?
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Old 30th March 2005, 04:23 PM   #4
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Join Date: Dec 2003
Location: Orange County, CA
Default ICE1000A

There is no stabilized circuit on the 1000A low voltage input. It needs a regulated 12V to 15V. Also, in series with the + and - inputs, wire a 1N4002 diode. This is because if you do not do this and one module goes, it will destroy everything else connected to the 15V supply.

You see, when an ICE module fails, the high voltage supply sort of "burps" out on the +15V line for a short time. If you have a blocking diode on the 15V supply, fine. However, if you do not, then all else connected to the 15V line is toast.

In developing a product using these, we lost all the modules in an amp several times and all the drive electronics until we made these diodes standard. I have mentioned this to the ICE Power folks and they said they will see abount incorporating them on the board in a future revision. However, for now, be advised that for now, you MUST put 1N4002 (any 1A 200V or better rectifier diode will do) diodes in series with the +15V and -15V lines.

Also, the 500A and 250A modules run on 12V, while the 1000A runs on 15V. WHat I have done is set my regulators at 12.6V and put the diodes in series with the low voltage suplies of each module. Running the 1000A on 12V has had so observable effect as the amp's output will clip far before you even come close to the supply rails on the input section.

By the way, when picking a transformer secondary voltage, you must assume 130V or 260V AC input depending on your country. I have seen the line at 250V when I was in Portugal and 120V to 123V is common here in SOuthern California. DOn't max out the supply voltage on an unregulated supply to get another 1/4 db of output then fry the amp when a high line condition comes along.

I sized my secondary to give 113V DC when the line voltage is 120VAC to operate the 100A and for 75V DC for the 500A.
Dan Fraser
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Old 30th March 2005, 04:46 PM   #5
PierreG is offline PierreG  Canada
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Join Date: Oct 2004
Originally posted by wytco0
I didnt realise these ICE modules were available, where can they be purchased?

You can find icepower 1000a modules here:
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Old 30th March 2005, 05:05 PM   #6
diyAudio Member
Join Date: Mar 2005
Location: Gothenburg
Thank you for your reply, Dan. I came to the conclusion that I needed a stabilized voltage input.
The transformers will leave 15V AC, and after rectifiers and stabilizers it will be at +-14V.
The main voltage will be at 118-120V, which is 5-7V under maximum recommended voltage. It says in the brochure that absolute maximum is 135V, so it should be on the safe side.

BTW, thank you for the advice about the diode, a cheap insurance.

Best Regards
Mattias Andersson
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Old 9th May 2005, 06:24 AM   #7
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Join Date: May 2005
Location: USA
Default ICEPower 1000A Finished Yet ???


Did you finish your ICEPower 1000A amp yet? If so how did it turn out?

From their spec sheet it looks like it would make a good woofer or subwoofer amp. It starts to roll off at 1K on the top end.

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Old 9th May 2005, 06:50 AM   #8
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Join Date: Mar 2005
Location: Gothenburg
Unfortunately I haven't finished the project yet. I'm in the middle of moving to a new apartment and finishing the mock up for my summer car, so there haven't been much time.

My amps will be in an subwoofer application, together with Subwoofers from TC Sounds. The woofers are 10" (40mm linear excursion) and the cabinet is a closed box of appr. 25-30 litres together with a Linkwitz Transform curcuit.
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