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Old 31st May 2013, 06:36 PM   #1
srinath is offline srinath  United States
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Default TAS 5630 distortion

I keep reading that @ 300 watts its distortion is 10%.
Has anyone pushed it that far and measured it ?

How can it be reduced - like say having a bigger power supply help ? Running it at a lower voltage like closer to 30v 25 amp ?
Or higher voltage like 50v 15 amp ?

It sounds really nice @ low power even with a dinky power supply even with the switches set to high gain. Does not sound over driven at all.

Thanks.
Srinath.
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Old 31st May 2013, 07:14 PM   #2
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10% THD means that the output is reaching near the supply voltage, IE clipping. Lowering the voltage = lower output power = no change in THD at max output.
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Old 31st May 2013, 07:34 PM   #3
srinath is offline srinath  United States
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OK I'll run it closer to the 50.

How does it sound so good when I have a 20 watt if that - wall wart power supply running it @ 30 v.

I guess since its capable of 10 per channel max, it sounds very clean, its clean @ 10 watts, the distortion goes up closer to 100.

Cool.
Srinath.
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Old 1st June 2013, 12:40 AM   #4
xrk971 is offline xrk971  United States
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IIRC, the specs say 0.1% thd when backed off to 250 watts. Just stay away from max power. Who runs an amp at over 80% output anyway? These are selling at amazon with what looks nice nice components for $70 shipping included!
Amazon.com: Assembled TAS5630 +OPA1632DR 300W Stereo Class-D Audio Power Amp Amplifier Board: Everything Else
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Old 2nd June 2013, 01:38 AM   #5
srinath is offline srinath  United States
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What is opa1632 ? volume control ? I actually would like that, but I am stuffing it into a pre existing chassis, like a pioner ct 2121 or an sx424 chassis, it would really need to be a separate volume pot, not one sitting on the board.

Cool.
Srinath.
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Old 4th August 2013, 05:32 PM   #6
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opa1632 is non-differntial to differerential premplifier, because TAS5630 have analog diff. inputs
i have built all (preamp with 1632 + TAS5630) it have strong power potential but i have only 120VA transformer used, so i get only 100W to four non distorted
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Old 6th August 2013, 08:07 PM   #7
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I am running the Sure TAS5630 board with a 48V 600 Watt Meanwell power supply. I am using an ADCOM Pramp/Tuner and it sounds great at the lower volumes I listen at. I did replace the noisy fan in the Power supply with a much quieter case fan (see my review of the power supply at Parts Express for details). It sounds great so far.
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Old 2nd January 2014, 04:48 PM   #8
kpa999 is offline kpa999  Norway
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Default So far, so good...

I have used the same combo (mean well 600w / 48V supply) and the 1 x 600 watts amp board.
I am repairing (or, rather reconstructing) a stage subwoofer (Mackie SRS 1500) with a kaput amlifier board.
The fan in the SMPS makes some noise, but for this application it is of no consequence.

The old PS in the sub was a toroidal 350w transformer, and the old amp was rated 500w @ 3 ohms. So, at least in theory, the new package should be able to deliver more punch than it used to.

It has not been tested live yet, but we have a gig lined up at the end of january, and then we'll find out if it performs as it should. We have one more of these, still in original order, so it is possible to A-B compare the two. All I can say at this point is, it looks really promising. The new amp is actually more silent than the old one - no hum and no background hiss, and it plays at least as loud as it used to.
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Old 6th January 2014, 06:56 PM   #9
kpa999 is offline kpa999  Norway
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Sorry about the photo link. This one works.
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Old 25th March 2014, 04:09 PM   #10
Nikitas is online now Nikitas  Greece
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I don't understand though why TI sells the evaluation boards SO MUCH more expensive...
TAS5630PHD2EVM Texas Instruments | Mouser
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