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Old 18th November 2009, 10:42 AM   #1
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Default Tda2030 vs lm1875

Which one is best sound quality wise and power wise?
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Old 18th November 2009, 11:45 AM   #2
pra3718 is offline pra3718  India
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Yes LM1875.

If I have already tda2030a in my drawer or for low investor, tda2030a is good sound for the PRICE )

I will use four IC 1:Tweeter 2:Mid 3&4:Woofer (Bridge) i.e. 18x2+35 = 70Watts per channel. (Please Note that TDA2030A works as power op.amp.) & Same for another channel. It would be better option then 2.1. tda2030a sounds good with correct grounding & good 8 Ohms speaker mounted on floor standing enclosers.
Calculate the project cost :=

12-0-12 5A transformer = xxxxx.xx
tda2030a x 8 = xxxxx.xx
& required Component = xxxxx.xx

OR

LM1875 (off-course is a winner)
18-0-18 5a transformer = xxxxx.xx
LM1875 x 2 = xxxxx.xx
& required Component = xxxxx.xx
Passive crossover with expensive inductors & capacitors.

For above two project, my choice would be tda2030a. BUT if I have money then I would go with lm1875 tri-amp.
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Old 18th November 2009, 12:00 PM   #3
ratza is offline ratza  Romania
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The LM1875 wins by far. I haven't looked at both datasheets, but the TDA2030 sounds way too compressed, has very poor dynamics. When I pulled it of the board and replaced it with the LM, the TDA ended in the trash bin.
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Old 18th November 2009, 12:24 PM   #4
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Quote:
Originally Posted by ratza View Post
The LM1875 wins by far. I haven't looked at both datasheets, but the TDA2030 sounds way too compressed, has very poor dynamics. When I pulled it of the board and replaced it with the LM, the TDA ended in the trash bin.
U mean i have a 2.1 channel computer speakers. They cantain tda2030a and pt2353. Can i change tda2030a with lm1875???????????????????????????????????????????? ???????? with out any problem or distortion in sound???????/
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Old 18th November 2009, 12:30 PM   #5
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Quote:
Originally Posted by pra3718 View Post
Yes LM1875.

If I have already tda2030a in my drawer or for low investor, tda2030a is good sound for the PRICE )

I will use four IC 1:Tweeter 2:Mid 3&4:Woofer (Bridge) i.e. 18x2+35 = 70Watts per channel. (Please Note that TDA2030A works as power op.amp.) & Same for another channel. It would be better option then 2.1. tda2030a sounds good with correct grounding & good 8 Ohms speaker mounted on floor standing enclosers.
Calculate the project cost :=

12-0-12 5A transformer = xxxxx.xx
tda2030a x 8 = xxxxx.xx
& required Component = xxxxx.xx

OR

LM1875 (off-course is a winner)
18-0-18 5a transformer = xxxxx.xx
LM1875 x 2 = xxxxx.xx
& required Component = xxxxx.xx
Passive crossover with expensive inductors & capacitors.

For above two project, my choice would be tda2030a. BUT if I have money then I would go with lm1875 tri-amp.
plzzzzzzzzzzzz can u provide me best professional and 100% error free quality schematic for tda2030a single and bridge????/ and if pcblay out is there its wonderrrrrrrrrrrrr fulllllllllllllll? Thank u so much i like ur project. and i also wana make the same if u can provide me the best quality schematic. and plz tell me the speaker size for mid and tweeter i mean 8 ohm in 5 inch or 4 inch. and also size of woofer speaker?????????
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Old 18th November 2009, 12:48 PM   #6
ratza is offline ratza  Romania
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Quote:
Originally Posted by livenicely View Post
Can i change tda2030a with lm1875?
Absolutely, without any other changes. The sound will get much much better.
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Old 18th November 2009, 01:20 PM   #7
pra3718 is offline pra3718  India
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Quote:
Can i change tda2030a with lm1875?
I would check ZOBEL & output diodes if exist.
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Old 18th November 2009, 02:28 PM   #8
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Originally Posted by pra3718 View Post
I would check ZOBEL & output diodes if exist.
Due to the pt2353 i think there is no zobel and i am not sure about diods but if they are as in typical application of tda2030a in datasheet can be removed with lm1875 becoz it is the only difference other than the difference in values of component in lm1875 and tda2030a typical schematic
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Old 18th November 2009, 03:15 PM   #9
ratza is offline ratza  Romania
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The diodes can be left there, they do not harm at all.
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Old 18th November 2009, 03:30 PM   #10
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Can i use tda2030a pcb for lm1875????????????
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