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Class D Switching Power Amplifiers and Power D/A conversion

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Old 22nd August 2011, 09:12 PM   #2251
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Originally Posted by osny View Post
The speaker is broken, or it is possible to fix?
Technically yes, but it requires sending it to a workshop that can fix it, and it will certainly be more expensive than a new driver.
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Old 22nd August 2011, 09:56 PM   #2252
osny is offline osny  Sweden
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Technically yes, but it requires sending it to a workshop that can fix it, and it will certainly be more expensive than a new driver.
Too bad ist a brand new
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Old 23rd August 2011, 07:05 AM   #2253
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Too bad ist a brand new
Then why don't you contact the dealer?
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Old 23rd August 2011, 09:33 AM   #2254
osny is offline osny  Sweden
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Then why don't you contact the dealer?
Import from USA, I don't feel like waiting for a new one, and ofc I would have to pay for it..
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Old 23rd August 2011, 10:38 AM   #2255
Falken is offline Falken  Sweden
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Hi!

Finally the woofers HP-10W arrived from Ljudia
( cancel order from Pluselektronik )

Mikael
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Old 23rd August 2011, 11:10 AM   #2256
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Import from USA, I don't feel like waiting for a new one, and ofc I would have to pay for it..
Even in the States they have consumer protection laws. I'm not completely sure but if something is broken on arrival and it's not due to delivery, they have to replace it free of charge if it's returned to them. If it's during delivery it got broken then it's the delivery company's insurance that has to cover it.
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Old 23rd August 2011, 12:24 PM   #2257
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This is the right level for direct connection to a very low output device like an iPod or most smart phones. It shouldn't need a step-up trafo.
but won't the step-up still up the volume?

and if so - will it create distortion when put on max?
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Old 23rd August 2011, 12:43 PM   #2258
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but won't the step-up still up the volume?

and if so - will it create distortion when put on max?
Yes, on both count. Actually it'll just make the chip shut-down at maximum volume.
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Old 23rd August 2011, 01:16 PM   #2259
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Yes, on both count. Actually it'll just make the chip shut-down at maximum volume.
fine - no step-up then
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Old 23rd August 2011, 03:06 PM   #2260
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just because nothing really happens at the roskilde forum (guess I should have seen that one coming) i decided to copy-paste my note, because i really need an answer

"So we've decided to build half a boominator (with a variant in the piezo's). Since one of the demands were that the box could last the entire week (or at least on one or two recharges), I have to make sure my calculations are right. Previosly in the thread you, saturnus, calculated it for someone, with the exact amp that we're using, with these numbers.

On 4 ohm the amp draws 350 mA on max volume, and if we use a traction batteri, with 22 Ah (the lowest we can go, without it being either too expensive or too small an amount)we would be able to hold for

22*2/0,35 = 125 hours

you also wrote that with 8 ohm it'll be twice as long, in other words about 250 hours which equals to about ten days are my calcuations correct or am I doing something wrong

the variant in piezo's are one of these two models

QLM-1005 - Ljudia - Multimedia Hemelektronik Karaoke PA anläggning DJ utrustning Ljus utrustning

Rila SA38 Piezo - Ljudia - Multimedia Hemelektronik Karaoke PA anläggning DJ utrustning Ljus utrustning

Can they be used ? "
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