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TOPIC: Fyi: 1ohm load (asymetric)

Fyi: 1ohm load (asymetric) 2 years 10 months ago #12367

  • ctrlaudio
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For your information, we have tested a subwoofer wired for a 1 ohm load and tortured it for many hours with (continuous) pure tones between 5 and 30hz without any problem. I know well these ICEpower modules and they are workhorses but i was still surprised it could sustain such a load.

In true RMS (continuous, not music) we reached 53w in stereo 4ohms asy, 69w in stereo 1 ohm asy and 87w in BTL 4ohms. Of course real life condition (music) is a lot more.

I wouldnt try less than 3ohms load in BTL or non-asymetric 1ohm, though. :ohmy:
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12368

  • John Ashman
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Is this the 150W amp module? By "asymetric" do you mean one channel driven? The reason I ask is that I was torn between running one 8 ohm woofer per channel and two (for a 4x12" sub enclosure).
Last Edit: 2 years 10 months ago by John Ashman.
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12385

  • devteam
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Ok, good to hear!
With this said, for reference sake to all end users out there, all this is quite outside the specs of the module. i.e. long term, the damage to the module is unknown and miniDSP just wanted to highlight that it could potentially be trouble for us to claim warranty repairs from IcePower when we ship back modules running that kind of "torture". Just want to put it in "Black and White" so there is no assumption made here. :-)

Thanks for your understanding,

DevTeam
MiniDSP, building a DIY DSP community one board at a time.
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12389

  • ctrlaudio
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DevTeam is absolutely right.

The ICEpower documents are clearly stating that minimum asymetric load should be 2/6 ohms on the 125ASX2 module.

But since we're working with ICEpower modules for several years now (commercial project R&D), i wanted to share my experience about it. But long-term or unventilated or complicated load could lead to different results, of course.

With this said, i'm still waiting to see a failure on an ASP or ASX series module due to 1ohm load. I'm running a 1.2ohm load on my ASP1000's for about 5 years now and they are running perfectly.
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12390

  • ctrlaudio
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You might be a little short in term of absolute power here... If you plan to make some DSP corrections in the 20-60hz, you'll need power to do so.

I can't wait to try the 250asx2 plateamp version.
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12396

  • devteam
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@ Ctrlaudio,

Do you mean this one? ;-)
www.minidsp.com/products/plate-amplifiers/pwr-ice250

Just updated online, we will start shipments next week. User manual will be the same as PWR-ICE125. Just need to change the title. :-)

DevTeam
MiniDSP, building a DIY DSP community one board at a time.
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The following user(s) said Thank You: John Ashman

Fyi: 1ohm load (asymetric) 2 years 10 months ago #12401

  • John Ashman
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EXCELLENT!!!! I can now build my Sting Arrays.
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12409

  • Jim the Oldbie
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John Ashman wrote:
EXCELLENT!!!! I can now build my Sting Arrays.

OK, +1 karma point for Coolest Speaker Name of the Month. B)

-- Jim
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12416

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devteam wrote:
@ Ctrlaudio,

Do you mean this one? ;-)
www.minidsp.com/products/plate-amplifiers/pwr-ice250

Just updated online, we will start shipments next week. User manual will be the same as PWR-ICE125. Just need to change the title. :-)

DevTeam

Great news. Just ordered one.

I have a 250asx2 module bought few years ago from B&O that i was about to swap into a PWR-ICE125 to make some tests and comparisons but the actual module is much better B)

If i'm allowed to do so, i'll post results of the tests on the forum including actual in-room max SPL measurements PWR-ICE125 v.s. PWR-ICE250

Jon
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12417

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devteam,

maybe you can't discuss it public, but i'll ask anyway: do you plan to use the new ICEmatch series from ICEpower in the upcoming years ?

Haven't tested ICEmatch yet but it looks interesting to pair up with miniDSP product (multiway).

Jon
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Fyi: 1ohm load (asymetric) 2 years 10 months ago #12418

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oh, i just noticed a new ASX series module: 600ASX

700w @ mono 4 ohms

maybe an interesting alternative to the ASP series.
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