Starkrimson® Ultra Amplifier Modules -- 250/500W into 8/4ohm

[JayGilb]

View attachment 212038

Is the heat sink designed to be in physical contact with the chassis ? ie - is it electrically isolated ?

 

[orchardaudio]

Is the heat sink designed to be in physical contact with the chassis ? ie - is it electrically isolated ?

The heatsink itself does not touch the chassis but it is electrically isolated using a 3M 8810 thermal pad.

 

[schubert]

I just ordered units for a dual mono ultra, that's why I'm asking. What's the lead spacing on the cap boards?

 

[orchardaudio]

I just ordered units for a dual mono ultra, that's why I'm asking. What's the lead spacing on the cap boards?

Thank you for your support. I think it is 10mm, if you ordered the kit the capacitors come with the kit. If it's not the kit here is the part number.
Nichicon / UKW1H472MRD
or
Nichicon / UVK1H472MRD

 

[schubert]

I was thinking of using KG instead of KW - will the case accommodate 50mm tall caps?

 

[orchardaudio]

I was thinking of using KG instead of KW - will the case accommodate 50mm tall caps?

There is not much room there with the 40mm caps, I don't know if 50 will fit but I doubt it.

 

[schubert]

ok good to know - thanks

 

[schubert]

I received the modules & power supplies promptly and in good order - thanks. One question, though......there's this nifty little 9V power supply included. I see where it could go, but........what's it for?

 

[orchardaudio]

I received the modules & power supplies promptly and in good order - thanks. One question, though......there's this nifty little 9V power supply included. I see where it could go, but........what's it for?

It is used for wiring the on/off button. Please see the provided instructions.

Going forward please email me. This is not the place to have these conversations.

 

[orchardaudio]

For those who are intersted as I see Amir is doing max power tests at 1% distortion for some of his latest reviewes. Here is what it is for the Starkrimson Ultra modules.

With 4ohm load it is not possible to get to 1% distortion because the over current protection kicks in before that happens. Hence I am only posting this test for 8 ohm load.

 

[David_M]

For those who are intersted as I see Amir is doing max power tests at 1% distortion for some of his latest reviewes. Here is what it is for the Starkrimson Ultra modules.

With 4ohm load it is not possible to get to 1% distortion because the over current protection kicks in before that happens. Hence I am only posting this test for 8 ohm load.

View attachment 258066

So the amp won't get to 1% THD+N running a 4-ohm load. So, what is the maximum available power at 4 ohms and at what THD+N does it occur at?

 

[orchardaudio]

So the amp won't get to 1% THD+N running a 4-ohm load. So, what is the maximum available power at 4 ohms and at what THD+N does it occur at?

You can see the posted charts for what distortion is at 500W. The amp overcurrent at 20A peak which equates to 14.14Arms or 800Wrms into 4 ohm.