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Old 5th June 2011, 08:40 PM   #1
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Default ICEpower 50asx2 modules

Classic audio parts is currently selling new ICEpower 50asx2 modules with no support at $100. Are these units "plug-in-play"? Or would I be better off buying something like a "class D audio" SDS-258 kit, which is designed for an amateur?
Class D Audio SDS-258 Kit
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Old 5th June 2011, 11:16 PM   #2
hoka is offline hoka  Netherlands
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These look like winners to me, I have the 200asx and like them very much, if they will ship to Holland I will buy a few!
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Old 6th June 2011, 12:23 AM   #3
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Thanks for your comment hoka.

I think they would be fairly easy to hook up a stereo amp.

Do you have any experience in hooking the 200asx as a MONO amp (Bridge Tied Load)?
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Old 6th June 2011, 07:05 AM   #4
hoka is offline hoka  Netherlands
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The 200 is a mono amp so there is no bridging or anything just connect power and in and output and off you go!
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Old 1st January 2012, 06:29 PM   #5
yoke is offline yoke  Croatia
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does any one have some drowing,pictures, how to transfer icepower from 2x50W to 1x170 ?
how to conect input ?
how to conect speaker ?

thanks
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Old 1st January 2012, 08:20 PM   #6
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The module comes in two different versions, stereo or so-called BTL (bridged).

You could brigde the stereo-version the same way all amps are bridged, but it would not give optimum performance regarding distortion.
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Old 1st January 2012, 10:24 PM   #7
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Here's the manual for the 50ASX2:

http://www.icepower.dk/files/solutio...asheet_1_2.pdf


I've been playing with the 125ASX2 (I've got extras if people are interested), and they are nice. The input impedance isn't exactly flat though, so a volume pot before the amp can be problematic. See this thread:

ICEPower 125ASX2 Measurements and Mods
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Old 2nd January 2012, 06:24 AM   #8
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That's why ICEpower recommend an input buffer before the ASX2 module I guess.

I have tested all of the ASX2 modules, and they are very nice, especially considering they are plug-and-play, don't need extra cooling, and they are quite inexpensive.... if you can get them. I still have a few 125ASX2 lying around.
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Old 2nd January 2012, 10:35 AM   #9
yoke is offline yoke  Croatia
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Thanks for the answers

will use 50axs for bass driver in 2.5way


I'am still not shure how to transfer it from stereo to BTL

here is the graph for BTL

Click the image to open in full size.

So to make this amp to work in BTL mode I have to have ;

- balanced XLR input ?
- speaker are connected on Ch2 output ?

and one thing that is not mention nowhere ;
I have to disorder some jumper on PCB (sorry don't have the picture of the amp right now, but will post it tomorrow) that transform amp from 2x50W to 1X170W ?

Last edited by yoke; 2nd January 2012 at 10:38 AM.
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Old 2nd January 2012, 07:31 PM   #10
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Yoke -

You need a phase inverter, something second nature for us old guys who are familiar with tubes. If you had a balanced input, you already have an inverted phase, but if you are doing single ended inputs, you'll want to build one. I built one from a dual op-amp. The input signal goes to the non-inverting input of one amp, and the inverting input of the other amp. I've got the amps setup for a gain of 2. so one amp output goes to channel input 1 and the other amp output goes to channel input 2 on the ICEPower amp.
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