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Class D Switching Power Amplifiers and Power D/A conversion

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Old 8th June 2012, 10:17 AM   #2891
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It's the one Phaedas (Michael) used in his orange one, so hop on over to the facebook page and ask there, and it's a safe bet he'll answer (we're co-admins of that page).
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Old 8th June 2012, 10:47 AM   #2892
Hafde is offline Hafde  Denmark
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Thanks a bunch!
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Old 8th June 2012, 11:05 AM   #2893
Hafde is offline Hafde  Denmark
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Saturnus, as discussed on the facebook page. would it be an incredibly stupid idea to move the Basreflex lower, and then install a handle at the top so that they are seperate. and still install the piece of wood to stiffen the sides, where the port would normally be?

(i know that any changes to the design, is considered as a downgrade of the quality)

but instead of doing like Phadreas orange Boominator
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Old 8th June 2012, 11:50 AM   #2894
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There is room for both you know. There aren't many handles that are more than about 95mm in height. And since there's 135mm from the port to the top there should be plenty of room for both without having to move the port.
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Old 8th June 2012, 01:38 PM   #2895
kblnig is offline kblnig  Denmark
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I have been thinking about installing an amp9 as a supplement to the amp6 (as Camp friost did it). I am unsure about the advantages and disadvanteges by the amp9 compared to the amp6.. I know this has been discussed before, but i couldn't find where, so here is my question

an amp9@24V will consume 4 times the power as the amp@12V (neglecting quiescent currents and other small losses). How does this correlate to the perceived loudness? (I am guessing that the SPL will only double while the power quadruples)
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Old 8th June 2012, 02:09 PM   #2896
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Quote:
Originally Posted by kblnig View Post
an amp9@24V will consume 4 times the power as the amp@12V (neglecting quiescent currents and other small losses). How does this correlate to the perceived loudness? (I am guessing that the SPL will only double while the power quadruples)
Sort of correct. It will appear to more forcefully but not quite twice as loud but will use 5 times the power (other losses included).
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Old 8th June 2012, 02:13 PM   #2897
kblnig is offline kblnig  Denmark
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So the SPL will be ~ twice as high or the perceived loudness will be twice as high :P? (or both)

btw thanks as always Saturnus
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Old 8th June 2012, 02:22 PM   #2898
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Quote:
Originally Posted by kblnig View Post
So the SPL will be ~ twice as high or the perceived loudness will be twice as high :P? (or both)

btw thanks as always Saturnus
SPL is a dB scale which is logarithmic. Saying that it's twice as high is confusing. What do you mean by that?

It will NOT be percieved as twice as loudness though. A full 10 times more power (+10dB in SPL) is required for that.
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Old 8th June 2012, 02:28 PM   #2899
kblnig is offline kblnig  Denmark
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Alright i get you point - Should have said raised by 3db i guess! so in summarry the gain in perceived loudness will be minimal compared to the extra power required! - i May reconsider if the amp9 is worth the effort then! - Thank you saturnus
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Old 8th June 2012, 02:34 PM   #2900
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Originally Posted by kblnig View Post
Alright i get you point - Should have said raised by 3db i guess! so in summarry the gain in perceived loudness will be minimal compared to the extra power required! - i May reconsider if the amp9 is worth the effort then! - Thank you saturnus
That wouldn't be correct either. It's +6dB increase in SPL when you double voltage or quadruble power (same thing).
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