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Old 23rd February 2010, 02:19 PM   #11
pra3718 is offline pra3718  India
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I have tried lot-off variations and still stick with

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Previous project 7.1 ( 7 chips=tda2030a & 1 chip=tda7294 )
It sounds very good & error-free. I build all this on the floor.
1) Transformer 2 Nos (12-0-12, 24-0-24)
2) Power supply 2 Nos ( One is for 2030 & another for 7294 )
3) Two big heat sink ( One is for 2030 & another for 7294 )
4) One big PCB & 7 Chips size 8" x 4" approx
5) PCB for 7294 size 4" x 4" approx
6) 4 channel crossover to run front amps & speakers
7) Low pass equalizer to run sub-7294.
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Old 9th March 2010, 02:45 PM   #12
ryan750 is offline ryan750  Philippines
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lowering the supply voltages would not reduce "volume" it would just make your amp clip sooner.
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Old 10th March 2010, 10:17 AM   #13
pra3718 is offline pra3718  India
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Quote:
lowering the supply voltages would not reduce "volume" it would just make your amp clip sooner.
there is good difference between 18 +/- , 35 +/- to powering tda7294 subwoofer.
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Old 10th March 2010, 10:52 AM   #14
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Hi, good luck for the big project. And be "very careful of proper grounding", when driving so many amps in same enclosure.
I'll suggest to use 3 transformers,
- One(24-0-24) for Sub + center
- One each for all left channels and one for all right channels. And let the 3 grounds be totally isolated.
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Old 10th September 2012, 05:58 PM   #15
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Is 18-0-18 , 5A trafo good for powering 6 channels of tda2050 amp ????????????
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Old 11th September 2012, 01:18 AM   #16
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theoritically may be ok for 5 channels. you need another 3A for subwoofer. But practically, 5A will be sufficient for all 6 ch.
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Old 12th September 2012, 10:46 AM   #17
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Hi, Kuldeep sir,
this 18-0-18 , 5A trafo can also work good with 6 channel lm1875 ??????????
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Old 12th September 2012, 01:37 PM   #18
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Ya. LM1875 & Tda2050 have similar power rating...
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Old 12th September 2012, 01:40 PM   #19
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By the way i have something which may interest you - LM1875/TDA2050 PCB
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Old 12th September 2012, 02:50 PM   #20
pra3718 is offline pra3718  India
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Hi Kuldeep

Do you purchase chips LM1875, LM3886, LM4780 locally ? Can you post your supplier name ?
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