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Class D Switching Power Amplifiers and Power D/A conversion

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Old 17th May 2011, 07:10 PM   #1521
rubennn is offline rubennn  Denmark
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Originally Posted by Wubbaz View Post
What retailer is this? Hifiladen?
Ljudia.se
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Old 17th May 2011, 07:50 PM   #1522
rubennn is offline rubennn  Denmark
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I'm actually considering using this IMG stageline SPA-10PA as a substitute. Parametres are pretty close (Vas is a little lower). I haven't quite figured out how you get WinISD to spit out the exact tuning frequency or the exact cabinet size, but I plotted the data from the datasheet into WinISD and chose 24,4 L box size with 2 speakers in it and a tuning frequency of 82 hz. This is what came out:
Click the image to open in full size.

Looks pretty neat? As far as I know you want 4+ dB rise at around 130-140 hz, yes?

And the price is pretty decent too.... Not like the HP-10W (close though), but I'm worried that I won't be able to finish it before the festival if they get them back in week 23. Anyone want to comment on this?
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Old 17th May 2011, 08:27 PM   #1523
Smoothy is offline Smoothy  Sweden
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How about the very expansive P.audio S10-64W? In my very untrained eyes it looks if anything like a beater choice. It would probably demand some smaller design changes.

Im in a desperate need for some speakers to my build so Im in for anything.
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Old 17th May 2011, 08:43 PM   #1524
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Originally Posted by rubennn View Post
(...) Not like the HP-10W (close though), but I'm worried that I won't be able to finish it before the festival if they get them back in week 23. Anyone want to comment on this?
Its doesnt take THAT long to build.. I spent around 2 days for the woodworking part.. What took the longest was getting a nice finish and playing around with the electronics..

Quote:
Originally Posted by Smoothy View Post
How about the very expansive P.audio S10-64W? In my very untrained eyes it looks if anything like a beater choice. It would probably demand some smaller design changes.

Im in a desperate need for some speakers to my build so Im in for anything.
If price is no option, you should go with the P.audio SN10MB series II those are the ones Saturnus recommends for his signature version and are audiophile quality.. However, quite expensive..
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Old 17th May 2011, 08:50 PM   #1525
Smoothy is offline Smoothy  Sweden
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. If price is no option, you should go with the P.audio SN10MB series II those are the ones Saturnus recommends for his signature version and are audiophile quality.. However, quite expensive..

Cant finde those in stock anywhere that delivers to Sweden, have you seen those guys?

on another note, can you use AMP6 with speakers connected to only one channel or do it take damage from that?
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Old 17th May 2011, 08:51 PM   #1526
rubennn is offline rubennn  Denmark
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Its doesnt take THAT long to build.. I spent around 2 days for the woodworking part.. What took the longest was getting a nice finish and playing around with the electronics...
It's also because we can't know for sure if they get them in week 23. At least I wouldn't count on it. So that's why I'm looking at this alternative.

Ljudia states that they will get them back in July/August.

I'd rather have something than nothing
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Old 18th May 2011, 08:39 AM   #1527
rubennn is offline rubennn  Denmark
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Okay here's a screenshot of a comparison between the HP-10W and the SPA-10PA. I'm gonna order this now. Not much of a difference between them (at least not in WinISD)
Click the image to open in full size.
ImageShack.us
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Last edited by rubennn; 18th May 2011 at 08:47 AM.
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Old 18th May 2011, 11:07 AM   #1528
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Problem with SP-10A is they start to roll off at 2.5KHz so you can't use them with piezos.
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Old 18th May 2011, 11:32 AM   #1529
Smoothy is offline Smoothy  Sweden
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Starts to feel like Im spamming this thread but i still have some questions.

The AMP6 is out of stock and no one knows when it will be back. Do you think that SURE´s amplifiers would do the job in the boominator? For example they do have a 2x25W model 2 X 25Watt Class-D Audio Amplifier Board - TPA3123 (AA-AB018)_Audio Amplifier Boards_Audio Amplifier and other Audio Boards_Audio, Video Equipments_Sure Electronics' Webstore

the also have a 2x100W model but Im afraid it will eat up the batteries to fast.

Any input on this?

And if you go with the SPA-10PA, what would be the piezos choice?

Last edited by Smoothy; 18th May 2011 at 11:56 AM.
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Old 18th May 2011, 12:15 PM   #1530
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I also have a few more questions for my boominator.
How big and long should the bass reflex port be, and what grills are the best for the hp-10w?
Links are very welcome.
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