IC's for 2.1CH O/P

bimbla · 29th September 2005, 09:37 AM

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.

peranders · 29th September 2005, 09:41 AM

Notice that 100 W (instead of 50W) will only get you 3 dB more, hardly noticable!

bimbla · 29th September 2005, 12:02 PM

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.

Nisbeth · 29th September 2005, 06:14 PM

2 x LM4780 are probably the easiest solution

/U.

sagarverma · 20th October 2005, 03:20 AM

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.

mic_ael · 28th November 2005, 09:15 AM

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!

sagarverma · 28th November 2005, 11:20 AM

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.

abid_rehan · 28th November 2005, 02:48 PM

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.

mic_ael · 28th November 2005, 10:54 PM

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

29th September 2005, 09:37 AM	#1
bimbla diyAudio Member Join Date: Jun 2002 Location: Where work is	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.

29th September 2005, 09:41 AM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Notice that 100 W (instead of 50W) will only get you 3 dB more, hardly noticable! __________________ /Per-Anders (my first name) or P-A as my friends call me

29th September 2005, 12:02 PM	#3
bimbla diyAudio Member Join Date: Jun 2002 Location: Where work is	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.

28th November 2005, 11:20 AM	#7
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	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. __________________ Never Underestimate The Bandwidth of A Station Wagon Full Of Magnetic Tapes Hurtling Down The Highway...................Andrew S Tanenbaum

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29th September 2005, 06:14 PM	#4
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	2 x LM4780 are probably the easiest solution /U.

20th October 2005, 03:20 AM	#5
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	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.

28th November 2005, 09:15 AM	#6
mic_ael diyAudio Member Join Date: Nov 2005	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!

28th November 2005, 02:48 PM	#8
abid_rehan diyAudio Member Join Date: Mar 2007	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.

28th November 2005, 10:54 PM	#9
mic_ael diyAudio Member Join Date: Nov 2005	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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