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Old 29th September 2005, 09:37 AM   #1
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Default IC's for 2.1CH O/P

I want to build a 2.1CH System. The wattage for the SW channel should be twice the main channel wattage. So if Left and Right are 50Wrms, each, I want the SW to be 100Wrms.

Is there a single 4Channel amplifier that will allow me to do so?
I am looking at 50+50+100

What other choices do you recommend? Can I bridge (or parallel) two channels in TA4100A from Tripath to get what I want? Or is 2 X LM4780 a better choice?

bimbla.
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Old 29th September 2005, 09:41 AM   #2
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Notice that 100 W (instead of 50W) will only get you 3 dB more, hardly noticable!
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Old 29th September 2005, 12:02 PM   #3
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Default 2.1ch AMP

I intend to have Satellite/ Subwoofer type of an arrangement.
Anyway, for 50Wrms( each) satellites (L & R), what wattage do you recommend for the subwoofer?

I will have a compressor for the .1 channel (also for l & R if reqd.)

regards,

Ravindra.
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Old 29th September 2005, 06:14 PM   #4
Nisbeth is offline Nisbeth  Denmark
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2 x LM4780 are probably the easiest solution


/U.
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Old 20th October 2005, 03:20 AM   #5
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use tda7294 better use tda7293.

fantastic chips at cheap prices.

great sound,clean reproduction and excellent freq. response.

use bridging techniques to get an amp for SW.use monoblocks for others.
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Old 28th November 2005, 09:15 AM   #6
mic_ael is offline mic_ael  Philippines
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hi sagarverma!

i know this 2 chips are very good, cheap and great sounding. can u post some schematic of this chips? i want to build this amp, but i have no idea how to work without using the mute or standby pin.. by the way, can i use TDA7295 as replacement to tda7294?..
im newbie, hope u can help me tanx!
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Old 28th November 2005, 11:20 AM   #7
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hi mic

send me your email id i will send u the tda7294 file.its a .ps file and it opens in acrobat.
it contains everything,pcb+components.
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Old 28th November 2005, 02:48 PM   #8
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hi mic:
alternately u can download datasheets of TDA7293 and 7294 and go through them as they have bridge and hi efficiency application guidelines, also you should have a look an AN1192 from national website there are lots of learning items in this application note.
Alternately do have a search at google fro bridge, paralle application of TDA7293.
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Old 28th November 2005, 10:54 PM   #9
mic_ael is offline mic_ael  Philippines
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thank guys!

i saw some scheme from, http://jeanyvesmartin.com/ but i dont no what is all mean i cant understand . i want to use his layout, but i want to use tda7293/tda7295 as replacement... my question is can i use this 2 chips tda7293/7295 in his pcb layout whithout changing or adding some components? is this thing work?... tda7294 is hard to find here in the phil!.. hope u can help me.

thanks again guys
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