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Old 4th September 2010, 04:32 PM   #11
sangram is offline sangram  India
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Maybe you need more efficient speakers if all you want is more loudness. I know you've been going at it for a while, and my advice is exactly the same as earlier. the money you've spent in building all these cheap and low peformance chipamps would have been better spent by building a good one to start with.

Buy cheap, buy twice
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Old 4th September 2010, 04:53 PM   #12
pra3718 is offline pra3718  India
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Another question is Can I use single Mute portion to multiple chips ?
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File Type: gif Mute.GIF (1.9 KB, 330 views)
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Old 4th September 2010, 05:04 PM   #13
sangram is offline sangram  India
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I don't see why not. Allow for a bit of current through the mute circuit though, even though it's not mentioned. 1 or 2mA is usually fine. Ensure your divider doesn't starve the pin of current as you add more chips.
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Old 4th September 2010, 05:05 PM   #14
pra3718 is offline pra3718  India
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Low performance chipamps gives experience to choose good one.
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Old 4th September 2010, 06:50 PM   #15
sangram is offline sangram  India
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Then don't complain about the price
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Old 4th September 2010, 06:57 PM   #16
aditya is offline aditya  India
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guys i didnt think you guys would miss out some thing sooo important... goss... WHNE YOU FREAKING BRIDGE THE TDA7265 YOUR VOLTAGES SHOULDNT BE ABOVE 16 0 16 ON THE PINS,, DO U EVEN READ THE DATA SHEETS PROPERLY

AND WHEN YOU USE THE TDA7265 IN NORMAL STEREO MODE... U GET A LOW SIDE DROP FROM 200Hz. AND WHEN YOU BRIDGE 7265 U GET IT AT 20Hz LIKE LM1875,

if you want to get more power try getting TDA7292 its same pin out , ie drop in replacement and is rated at 40 + 40 watt and has low on 20Hz side unlike TDA7265 .... at 200Hz drop start

Last edited by aditya; 4th September 2010 at 07:22 PM.
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Old 4th September 2010, 08:02 PM   #17
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Quote:
Originally Posted by pra3718 View Post
4. LM3886 Build=Easy, Mute=Yes, Loudness=Very Good, Price=Very-Very Expensive
5. TDA7294 Build=Not Easy, Mute=Yes, Loudness=Very Good, Price=Very Expensive
If you have already built those two and they have met your expectations, what is the hustle about trying others?

One point seems to be missing in your list: how did you like the sound of each chip? Or didn't you notice any differences except for the loudness?
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Old 4th September 2010, 10:26 PM   #18
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i'm using the mute pin for standby on the TDA7265. I forget how exactly but I remember the data sheet showed what voltage difference you wanted for on vs mute vs standby.
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Old 5th September 2010, 02:08 PM   #19
pra3718 is offline pra3718  India
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You are right sangram, I am looking chip easy to build, high power & quality performance and cheap. which is possible ? possibly no.

Thanks Aditya for your advice for TDA7292. I was not aware of it.

Today, I started to build tda7265 but I found my general dotted pcb's holes & tda7265 pin not align. Stuck-up. tda7265 pin alignment match with lm3886 and not with tda7294 & my general dotted pcb. Till today, I could not etch pcb right-way. I know all theory how to etch. But ... I will try one more time.

Thanks & Best Regards.
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Old 5th September 2010, 05:30 PM   #20
aditya is offline aditya  India
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Quote:
Originally Posted by pra3718 View Post
You are right sangram, I am looking chip easy to build, high power & quality performance and cheap. which is possible ? possibly no.

Thanks Aditya for your advice for TDA7292. I was not aware of it.

Today, I started to build tda7265 but I found my general dotted pcb's holes & tda7265 pin not align. Stuck-up. tda7265 pin alignment match with lm3886 and not with tda7294 & my general dotted pcb. Till today, I could not etch pcb right-way. I know all theory how to etch. But ... I will try one more time.

Thanks & Best Regards.

i think you made a mistake in reading wht i had typed, use TDA7292, check in out through gooogle.
its is same pin out as TDA7265,

tda7294 is mono and may be a bit advance for you , as its got stdby and mute pins seperate,

i have pcb lay out for tda7265 which works fine if you want i could post it here... then just do a photo transfer,,,

i have PGA2311 volume control kit with 8 input selection for 2000/- if your interested let me know
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