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Old 24th July 2012, 12:13 PM   #1181
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Join Date: Nov 2009
Location: UK, Manchester
cheers!

I have a quick question or even more an issue with my recently ordered TA2020 assembled board.
Although it works on very moderate volume in a car, it goes into proection mode once I increase the volume just a bit...it's like it turns off for some 0.5s or even less. This happens with both channel loaded, if only one is used, it could play very loud! Tried with 14v 1A PS at home, same behaviour...

Is this a problem of PS as it's about 2A 12v in the car as far as I know and simply it could be not enough for the chip as written in different threads here on the forum, or this could be some other issue?

what I noticed is that with 3300uf cap between VDD and GND it goes in protection mode playing even more silent...stock cap is 330uf and I removed it at all leaving only 0.1uf mkt.

Last edited by dtses; 24th July 2012 at 12:28 PM.
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Old 24th July 2012, 10:01 PM   #1182
Trileru is offline Trileru  Romania
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Join Date: Dec 2010
Hello everyone. I want to get a small tripath amp, in an aluminum casing. I found some on ebay but I don't know exactly which one to get. I want one that I can change the caps for better ones. I will be using it for testing, maybe build some monitors for my office. Also I have a pair of Fostex FE206EN that I will put in a Dallas II enclosure for my tube amp but I will leave that for winter

I found 2 form factors that the ta2020 comes in:
http://img.alibaba.com/img/pb/942/35...356942_075.jpg and http://www.hllyhifi.com/images/TP-2020-0.jpg
Is there a "preferred" one? I want one because it's cheap small and has good quality to the sound. I would get a kit but I like both enclosures and don't want to have that on my head at the moment. Also is it worth looking at other chips? I saw some that used the ta2024, is it better?
2*15W TA2024 Tripath Class-D Digital Audio Amplifier | eBay
Any advice would be appreciated. Thank you.

later edit

i found these that looks nice inside
http://www.ebay.com/itm/TA2020-SA-36...ht_3977wt_1051

http://www.ebay.com/itm/MUSE-M20-EX2...item1c1d3749ce
anyone got this form factor? looks a bit cramped inside, not much room for modding.

Last edited by Trileru; 24th July 2012 at 10:21 PM.
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Old 27th July 2012, 06:10 PM   #1183
Bare is offline Bare  Canada
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Join Date: Dec 2001
Location: vancouver
These in either flavour WILL require modifications to make them sound Good.
In which case the Ali case may not fit the necessary parts replacements ie the Inductors are the First that need replacing All I'm saying Is don't be buying based on the external appearances
Have you looked up the Lepai Ta2020 Amplifier? There is a Huge thread on it in these forums and it's usually cheaper than the ones you have linked.
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Old 27th July 2012, 06:18 PM   #1184
Trileru is offline Trileru  Romania
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This is the actual thread for lepai ta2020 I got the smaller one and I'll get a larger one because I have another set of bi amped speakers. Thank you for the info.
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Old 27th July 2012, 10:35 PM   #1185
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Join Date: May 2012
Quote:
Originally Posted by Bare View Post
Have you looked up the Lepai Ta2020 Amplifier? There is a Huge thread on it in these forums and it's usually cheaper than the ones you have linked.
uhhh this is the Lepai Ta2020 thread
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Old 28th July 2012, 02:00 AM   #1186
Bare is offline Bare  Canada
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Oooops Sorry There are soooo many threads here... I get confused :-)
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Old 28th July 2012, 02:40 AM   #1187
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Join Date: Jun 2012
so ive read and no clear answer

that weird noise it makes when turn on/off. some say the new models (A+) dont make this. but i just got my lepai lp-2020A+ and it does in fact make the noise.

what is that noise? anyway to get rid of it? dangerous for my speakers?

thanks in advance
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Old 28th July 2012, 06:14 PM   #1188
Bare is offline Bare  Canada
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Location: vancouver
I understand that one needs a relay delay circuit to eliminate the POP sound at turn on and turn off.
Yes, it is bad for speakers.
But that is related to the cost of speakers imo, for example with a $5 driver not a big issue.. just bad noises.
A $500+ Driver? then the Lepai goes into the trash bin without a second thought.
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Old 28th July 2012, 06:51 PM   #1189
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Join Date: Jun 2012
Quote:
Originally Posted by Bare View Post
I understand that one needs a relay delay circuit to eliminate the POP sound at turn on and turn off.
Yes, it is bad for speakers.
But that is related to the cost of speakers imo, for example with a $5 driver not a big issue.. just bad noises.
A $500+ Driver? then the Lepai goes into the trash bin without a second thought.
thanks for the info..

very noob here..

how can i incorporate a relay delay? how hard is it? i thought the A+ already came with it.
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Old 28th July 2012, 07:57 PM   #1190
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I think better and more simple choice to buy slightly pricier, but far better amps like Sure, SMSL, or MUSE, rather than Lepai. $20-$40 (without power adapter) - the same price league as Lepai. They use TA2020, TA2021, TA2024 chips.
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