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Class D Switching Power Amplifiers and Power D/A conversion

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Old 21st September 2013, 01:16 PM   #31
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Join Date: Sep 2009
Location: Romania,Calarasi
Hello guys, i recently buyed one amp with power supply from sure-hifi (ebay) and i saw there was a warning there (DO NOT power the amplifier board when there's signal input, or the chip will be burnt out. It's suggested to plug RCA jack first, stop signal input and then power the amplifier board. Finally, Begin signal input after 1 second) dose anyone had this problem? this sounds absurd to me.That means, the amp is very unstable.
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Old 4th October 2013, 11:22 PM   #32
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Join Date: May 2008
Location: croatia
this bundle tas5630 and power supply 350w title says 300w x2 and in same title power supply 350w ..wtf but ok should be around 100w rms per channel..and when i found that line about burning amp when playing music and disconnect from mains i ordered it in matter of seconds they bougt me on that ...try to guess what will i first do when amp comes in my hands
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Old 15th December 2013, 01:06 PM   #33
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Don't order TI TAS5630, its sound quality is not good. I've ordered 4 IRS2092 2x250W boards and sound quality is much better. It uses dual +/- power supply and at high voltage values (+-60V) with low resident noise and lower THD+N (only 0.007% at 100W). The sound quality is very very good. I use a 2KW toroidal transformer and two Nichicon 100.000uF capacitors in power supply stage.
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Old 16th December 2013, 09:14 AM   #34
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Join Date: Dec 2003
Location: Randers, Denmark
Quote:
Originally Posted by authlxl View Post
Our tas5630 amp revised many times now, works stable, all the chip are TAS5630B now,many friend ask us for the reason why not develop tas5631b PWM input amp, we think it is same chip indeed, only add low frequency pass filter ahead.we think PWM is analog not digital indeed.if use tas5631b, we have to add one i2s to PWM chip , cost higher.
Good suggestions are appreciated, Many thanks!
But cost of I2S to PWM are probably cheaper than a good DAC. I once owned the panasonix SA-XR55 (don't no which TAS chip). Analouge input was bad sounding, but digital spdif was really good.
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