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Class D Switching Power Amplifiers and Power D/A conversion

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Old 13th June 2010, 02:20 PM   #631
Shik is offline Shik  Denmark
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Sleep jumper what?
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Old 13th June 2010, 02:40 PM   #632
Shik is offline Shik  Denmark
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If you are referring to the jumper next to the jack plug, it was already placed in the position next to the edge of board.
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Old 13th June 2010, 02:46 PM   #633
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Quote:
Originally Posted by Shik View Post
Sleep jumper what?
Thought so.

See the build instructions

They are the two "double naked pins" with accompanying little black jumpers, which is basically just a short circuit. The one nearest the chip needs to be jumpered or the amp is in SLEEP mode.
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Old 13th June 2010, 03:37 PM   #634
Shik is offline Shik  Denmark
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Ok, got it working, thanks Saturnus!

I've just tested it on my home speakers (B&W CM7) and when I crank it up on my iPod there is some distortion, like it is too much for the speakers.
I'm looking forward to test it in my build soon.
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Old 13th June 2010, 04:45 PM   #635
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Quote:
Originally Posted by Shik View Post
Ok, got it working, thanks Saturnus!

I've just tested it on my home speakers (B&W CM7) and when I crank it up on my iPod there is some distortion, like it is too much for the speakers.
I'm looking forward to test it in my build soon.
Probably a ground on the inputs that is connect wrong somewhere.
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Old 13th June 2010, 05:52 PM   #636
Shik is offline Shik  Denmark
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Ground on the inputs? I just got an iPod connected with jack plug, but it is only when I crank the volume pretty high.
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Old 13th June 2010, 06:32 PM   #637
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I have now decided the woofer and im doubting between two tweeters.
Woofer is going to be a P.Audio WN-8R. Tweeter options are Monacor DT-25 or Wavecor TW030WA02

So the problem is which tweeter matches better with the woofer? Crossover frequency is going to be around 2000Hz and is going to be a butterworth-type filter to dampen the woofers peak at around 2000Hz. Looking at the frequency response graphs i assume i don't need any other filters to flatten the freq. response? Ofcourse if I use the wavecor tweeter I need to take in account that it has 4ohm impedance.

P. Audio WN-8R:
Click the image to open in full size.
Monacor DT-25:
Click the image to open in full size.
Wavecor TW030WA02:
Click the image to open in full size.

It would be very nice if someone could give me some guiding in choosing the right tweeter and crossover so i could start ordering them. If you have any better tweeter options im up for them too.
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Old 14th June 2010, 08:37 PM   #638
Shik is offline Shik  Denmark
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Now I have tested in my own build, I still got distortion (overstyring?) in the woofers when cranking volume up.
How can I parallel connect 2 woofers (playing mono) and still have stereo in tweeters?
I will also receive another TA2020 amp tomorrow, maybe I can use 2 then.
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Old 14th June 2010, 09:24 PM   #639
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Quote:
Originally Posted by Shik View Post
How can I parallel connect 2 woofers (playing mono) and still have stereo in tweeters?
Don't.
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Old 14th June 2010, 09:41 PM   #640
Shik is offline Shik  Denmark
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Okay, what do you suggest I should do then?
I will be getting another amp as mentioned tomorrow.
I have 2 woofers and 2 tweeters.

Any comments on the distortion?
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