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Class D Switching Power Amplifiers and Power D/A conversion

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Old 9th May 2012, 11:16 AM   #2761
blossom is offline blossom  New Zealand
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At tuning frequency the air in the port will be moving out at the same time as the speaking is moving out i believe roughly. You should do some googling perhaps start with wikipedia, base reflex enclosure, shouldnt take you to long to learn how this all works.

Last edited by blossom; 9th May 2012 at 11:22 AM. Reason: correcting errors
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Old 9th May 2012, 12:53 PM   #2762
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Quote:
Originally Posted by blossom View Post
At tuning frequency the air in the port will be moving out at the same time as the speaking is moving out i believe roughly. You should do some googling perhaps start with wikipedia, base reflex enclosure, shouldnt take you to long to learn how this all works.
In theory the drivers actually does not move at all at the port tuning frequency, only the volume of air in the port moves.

Barbfa's point in that you should not couple left and right signals into the same volume of air as you risk very strange behaviour when the stereo signal is not identical especially in the bass region in either channel. This is very evident on especially older and other high quality recordings whereas less of an issue if your only source is poorly produced, especially newer recordings.

Therefore I recommend that when you are building a half-boominator that you do not have holes in the center brace but instead treat each as a seperate speaker with it's own reflex port..
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Old 9th May 2012, 02:55 PM   #2763
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Since there is no HP-10W available. Are these a good alternative until HP-10W are in stock? They will be like 1-2 months to get and i need something right now ^^

MGR F-2010W - Ljudia - Multimedia Hemelektronik Karaoke PA anläggning DJ utrustning Ljus utrustning
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Old 9th May 2012, 02:59 PM   #2764
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Originally Posted by rallyrally View Post
Since there is no HP-10W available. Are these a good alternative until HP-10W are in stock? They will be like 1-2 months to get and i need something right now ^^

MGR F-2010W - Ljudia - Multimedia Hemelektronik Karaoke PA anläggning DJ utrustning Ljus utrustning
In stock

The only viable substitute is the superior P.Audio SN-10MB Series II.
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Old 9th May 2012, 03:18 PM   #2765
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In stock

The only viable substitute is the superior P.Audio SN-10MB Series II.
And Eminence Basslite S2010 but that requires real tweeters and a real crossover plus a slightly changed cabinet design.

And can I just say that Intertechnik is a fine webstore. Never had any complaints.
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Old 9th May 2012, 03:26 PM   #2766
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Originally Posted by PressureFM View Post
In stock

The only viable substitute is the superior P.Audio SN-10MB Series II.
Quote:
Originally Posted by Saturnus View Post
And Eminence Basslite S2010 but that requires real tweeters and a real crossover plus a slightly changed cabinet design.

And can I just say that Intertechnik is a fine webstore. Never had any complaints.

Yeah. Pretty expensive for a boombox that might break or get stolen when i think about it. I was thinking on a 1500 SEK (~170EUR) budget. Already spent 70EUR on the AMP6.

Oh well. Now that i got a quality amp i guess i need decent speakers too.
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Old 9th May 2012, 03:29 PM   #2767
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And Eminence Basslite S2010 but that requires real tweeters and a real crossover plus a slightly changed cabinet design.

And can I just say that Intertechnik is a fine webstore. Never had any complaints.
Just curious but can't you only get the Eminence Basslite S2010 in the US? Ninja'd myself, found them at BlueAran.

Also, fun is about to start.
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Old 9th May 2012, 04:00 PM   #2768
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HP-10W on its way

I cant figure out how to calculate the size of the box. I really suck at building stuff. My friend is helping me but i dont know how large the box should be.

Help please? I've downloaded WinISD but doesnt make any sense to me.

Im using:
2x HP10W
2x Piezo
Amp6-Basic
7,2Ah battery


Is 3" reflexports enough by the way?
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Old 9th May 2012, 04:14 PM   #2769
Hafde is offline Hafde  Denmark
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This looks like some nice gadget, to have installed in the lid?

Batteriindikator 12v för solcell, golfbil, elbil, husvagn mm på Tradera.

just too bad that it is not for sale anymore, and i cant find it anywhere else
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Old 10th May 2012, 10:47 AM   #2770
LukasL is offline LukasL  Denmark
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Hey folks!
I am having a bit trouble finding the right resistors.
Can I use a 47 ohm, 2W carbon film resistor with the monacor MPT-001?

10ps Japan RM (RMG) resistor carbon film audio grade 2W 47ohm|eBay
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